AVCodecContext Struct Reference

#include <avcodec.h>

List of all members.

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Detailed Description

main external API structure

Definition at line 774 of file avcodec.h.

Public Attributes
AVClass *	av_class
	information on struct for av_log set by avcodec_alloc_context
int	bit_rate
	the average bitrate encoding: Set by user; unused for constant quantizer encoding.
int	bit_rate_tolerance
	number of bits the bitstream is allowed to diverge from the reference.
int	flags
	CODEC_FLAG_*.
int	sub_id
	Some codecs need additional format info.
int	me_method
	Motion estimation algorithm used for video coding.
uint8_t *	extradata
	some codecs need / can use extradata like Huffman tables.
int	extradata_size
AVRational	time_base
	This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented.
int	width
	picture width / height.
int	height
int	gop_size
	the number of pictures in a group of pictures, or 0 for intra_only encoding: Set by user.
enum PixelFormat	pix_fmt
	Pixel format, see PIX_FMT_xxx.
int	rate_emu
	Frame rate emulation.
void(*	draw_horiz_band )(struct AVCodecContext *s, const AVFrame *src, int offset[4], int y, int type, int height)
	If non NULL, 'draw_horiz_band' is called by the libavcodec decoder to draw a horizontal band.
int	sample_rate
	samples per second
int	channels
enum SampleFormat	sample_fmt
	audio sample format encoding: Set by user.
int	frame_size
	Samples per packet, initialized when calling 'init'.
int	frame_number
	audio or video frame number
int	real_pict_num
	Returns the real picture number of previous encoded frame.
int	delay
	Number of frames the decoded output will be delayed relative to the encoded input.
int	avcodec_dual_language
	set when bilingual audio data has been detected.
float	qcompress
	amount of qscale change between easy & hard scenes (0.0-1.0)
float	qblur
	amount of qscale smoothing over time (0.0-1.0)
int	qmin
	minimum quantizer encoding: Set by user.
int	qmax
	maximum quantizer encoding: Set by user.
int	max_qdiff
	maximum quantizer difference between frames encoding: Set by user.
int	max_b_frames
	maximum number of B-frames between non-B-frames Note: The output will be delayed by max_b_frames+1 relative to the input.
float	b_quant_factor
	qscale factor between IP and B-frames encoding: Set by user.
int	rc_strategy
	obsolete FIXME remove
int	b_frame_strategy
int	hurry_up
	hurry up amount encoding: unused decoding: Set by user.
struct AVCodec *	codec
void *	priv_data
int	rtp_mode
int	rtp_payload_size
void(*	rtp_callback )(struct AVCodecContext *avctx, void *data, int size, int mb_nb)
int	mv_bits
int	header_bits
int	i_tex_bits
int	p_tex_bits
int	i_count
int	p_count
int	skip_count
int	misc_bits
int	frame_bits
	number of bits used for the previously encoded frame encoding: Set by libavcodec.
void *	opaque
	Private data of the user, can be used to carry app specific stuff.
char	codec_name [32]
enum CodecType	codec_type
enum CodecID	codec_id
unsigned int	codec_tag
	fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
int	workaround_bugs
	Work around bugs in encoders which sometimes cannot be detected automatically.
int	luma_elim_threshold
	luma single coefficient elimination threshold encoding: Set by user.
int	chroma_elim_threshold
	chroma single coeff elimination threshold encoding: Set by user.
int	strict_std_compliance
	strictly follow the standard (MPEG4, .
float	b_quant_offset
	qscale offset between IP and B-frames If > 0 then the last P-frame quantizer will be used (q= lastp_q*factor+offset).
int	error_resilience
	Error resilience; higher values will detect more errors but may misdetect some more or less valid parts as errors.
int(*	get_buffer )(struct AVCodecContext *c, AVFrame *pic)
	Called at the beginning of each frame to get a buffer for it.
void(*	release_buffer )(struct AVCodecContext *c, AVFrame *pic)
	Called to release buffers which where allocated with get_buffer.
int	has_b_frames
	If 1 the stream has a 1 frame delay during decoding.
int	block_align
	number of bytes per packet if constant and known or 0 Used by some WAV based audio codecs.
int	parse_only
int	mpeg_quant
	0-> h263 quant 1-> mpeg quant encoding: Set by user.
char *	stats_out
	pass1 encoding statistics output buffer encoding: Set by libavcodec.
char *	stats_in
	pass2 encoding statistics input buffer Concatenated stuff from stats_out of pass1 should be placed here.
float	rc_qsquish
	ratecontrol qmin qmax limiting method 0-> clipping, 1-> use a nice continous function to limit qscale wthin qmin/qmax.
float	rc_qmod_amp
int	rc_qmod_freq
RcOverride *	rc_override
	ratecontrol override, see RcOverride encoding: Allocated/set/freed by user.
int	rc_override_count
char *	rc_eq
	rate control equation encoding: Set by user decoding: unused
int	rc_max_rate
	maximum bitrate encoding: Set by user.
int	rc_min_rate
	minimum bitrate encoding: Set by user.
int	rc_buffer_size
	decoder bitstream buffer size encoding: Set by user.
float	rc_buffer_aggressivity
float	i_quant_factor
	qscale factor between P and I-frames If > 0 then the last p frame quantizer will be used (q= lastp_q*factor+offset).
float	i_quant_offset
	qscale offset between P and I-frames encoding: Set by user.
float	rc_initial_cplx
	initial complexity for pass1 ratecontrol encoding: Set by user.
int	dct_algo
	DCT algorithm, see FF_DCT_* below encoding: Set by user.
float	lumi_masking
	luminance masking (0-> disabled) encoding: Set by user.
float	temporal_cplx_masking
	temporary complexity masking (0-> disabled) encoding: Set by user.
float	spatial_cplx_masking
	spatial complexity masking (0-> disabled) encoding: Set by user.
float	p_masking
	p block masking (0-> disabled) encoding: Set by user.
float	dark_masking
	darkness masking (0-> disabled) encoding: Set by user.
int	unused
int	idct_algo
	IDCT algorithm, see FF_IDCT_* below.
int	slice_count
	slice count encoding: Set by libavcodec.
int *	slice_offset
	slice offsets in the frame in bytes encoding: Set/allocated by libavcodec.
int	error_concealment
	error concealment flags encoding: unused decoding: Set by user.
unsigned	dsp_mask
	dsp_mask could be add used to disable unwanted CPU features CPU features (i.e.
int	bits_per_sample
	bits per sample/pixel from the demuxer (needed for huffyuv).
int	prediction_method
	prediction method (needed for huffyuv) encoding: Set by user.
AVRational	sample_aspect_ratio
	sample aspect ratio (0 if unknown) Numerator and denominator must be relatively prime and smaller than 256 for some video standards.
AVFrame *	coded_frame
	the picture in the bitstream encoding: Set by libavcodec.
int	debug
	debug encoding: Set by user.
int	debug_mv
	debug encoding: Set by user.
uint64_t	error [4]
	error encoding: Set by libavcodec if flags&CODEC_FLAG_PSNR.
int	mb_qmin
	minimum MB quantizer encoding: unused decoding: unused
int	mb_qmax
	maximum MB quantizer encoding: unused decoding: unused
int	me_cmp
	motion estimation comparison function encoding: Set by user.
int	me_sub_cmp
	subpixel motion estimation comparison function encoding: Set by user.
int	mb_cmp
	macroblock comparison function (not supported yet) encoding: Set by user.
int	ildct_cmp
	interlaced DCT comparison function encoding: Set by user.
int	dia_size
	ME diamond size & shape encoding: Set by user.
int	last_predictor_count
	amount of previous MV predictors (2a+1 x 2a+1 square) encoding: Set by user.
int	pre_me
	prepass for motion estimation encoding: Set by user.
int	me_pre_cmp
	motion estimation prepass comparison function encoding: Set by user.
int	pre_dia_size
	ME prepass diamond size & shape encoding: Set by user.
int	me_subpel_quality
	subpel ME quality encoding: Set by user.
enum PixelFormat(*	get_format )(struct AVCodecContext *s, const enum PixelFormat *fmt)
	callback to negotiate the pixelFormat
int	dtg_active_format
	DTG active format information (additional aspect ratio information only used in DVB MPEG-2 transport streams) 0 if not set.
int	me_range
	maximum motion estimation search range in subpel units If 0 then no limit.
int	intra_quant_bias
	intra quantizer bias encoding: Set by user.
int	inter_quant_bias
	inter quantizer bias encoding: Set by user.
int	color_table_id
	color table ID encoding: unused decoding: Which clrtable should be used for 8bit RGB images.
int	internal_buffer_count
	internal_buffer count Don't touch, used by libavcodec default_get_buffer().
void *	internal_buffer
	internal_buffers Don't touch, used by libavcodec default_get_buffer().
int	global_quality
	Global quality for codecs which cannot change it per frame.
int	coder_type
	coder type encoding: Set by user.
int	context_model
	context model encoding: Set by user.
uint8_t *(*	realloc )(struct AVCodecContext *s, uint8_t *buf, int buf_size)
	encoding: unused decoding: Set by user.
int	slice_flags
	slice flags encoding: unused decoding: Set by user.
int	xvmc_acceleration
	XVideo Motion Acceleration encoding: forbidden decoding: set by decoder.
int	mb_decision
	macroblock decision mode encoding: Set by user.
uint16_t *	intra_matrix
	custom intra quantization matrix encoding: Set by user, can be NULL.
uint16_t *	inter_matrix
	custom inter quantization matrix encoding: Set by user, can be NULL.
unsigned int	stream_codec_tag
	fourcc from the AVI stream header (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
int	scenechange_threshold
	scene change detection threshold 0 is default, larger means fewer detected scene changes.
int	lmin
	minimum Lagrange multipler encoding: Set by user.
int	lmax
	maximum Lagrange multipler encoding: Set by user.
struct AVPaletteControl *	palctrl
	palette control structure encoding: ??? (no palette-enabled encoder yet) decoding: Set by user.
int	noise_reduction
	noise reduction strength encoding: Set by user.
int(*	reget_buffer )(struct AVCodecContext *c, AVFrame *pic)
	Called at the beginning of a frame to get cr buffer for it.
int	rc_initial_buffer_occupancy
	Number of bits which should be loaded into the rc buffer before decoding starts.
int	inter_threshold
	encoding: Set by user.
int	flags2
	CODEC_FLAG2_* encoding: Set by user.
int	error_rate
	Simulates errors in the bitstream to test error concealment.
int	antialias_algo
	MP3 antialias algorithm, see FF_AA_* below.
int	quantizer_noise_shaping
	quantizer noise shaping encoding: Set by user.
int	thread_count
	thread count is used to decide how many independent tasks should be passed to execute() encoding: Set by user.
int(*	execute )(struct AVCodecContext *c, int(*func)(struct AVCodecContext *c2, void *arg), void **arg2, int *ret, int count)
	The codec may call this to execute several independent things.
void *	thread_opaque
	thread opaque Can be used by execute() to store some per AVCodecContext stuff.
int	me_threshold
	Motion estimation threshold below which no motion estimation is performed, but instead the user specified motion vectors are used.
int	mb_threshold
	Macroblock threshold below which the user specified macroblock types will be used.
int	intra_dc_precision
	precision of the intra DC coefficient - 8 encoding: Set by user.
int	nsse_weight
	noise vs.
int	skip_top
	Number of macroblock rows at the top which are skipped.
int	skip_bottom
	Number of macroblock rows at the bottom which are skipped.
int	profile
	profile encoding: Set by user.
int	level
	level encoding: Set by user.
int	lowres
	low resolution decoding, 1-> 1/2 size, 2->1/4 size encoding: unused decoding: Set by user.
int	coded_width
	Bitstream width / height, may be different from width/height if lowres or other things are used.
int	coded_height
int	frame_skip_threshold
	frame skip threshold encoding: Set by user.
int	frame_skip_factor
	frame skip factor encoding: Set by user.
int	frame_skip_exp
	frame skip exponent encoding: Set by user.
int	frame_skip_cmp
	frame skip comparison function encoding: Set by user.
float	border_masking
	Border processing masking, raises the quantizer for mbs on the borders of the picture.
int	mb_lmin
	minimum MB lagrange multipler encoding: Set by user.
int	mb_lmax
	maximum MB lagrange multipler encoding: Set by user.
int	me_penalty_compensation
	encoding: Set by user.
enum AVDiscard	skip_loop_filter
	encoding: unused decoding: Set by user.
enum AVDiscard	skip_idct
	encoding: unused decoding: Set by user.
enum AVDiscard	skip_frame
	encoding: unused decoding: Set by user.
int	bidir_refine
	encoding: Set by user.
int	brd_scale
	encoding: Set by user.
float	crf
	constant rate factor - quality-based VBR - values ~correspond to qps encoding: Set by user.
int	cqp
	constant quantization parameter rate control method encoding: Set by user.
int	keyint_min
	minimum GOP size encoding: Set by user.
int	refs
	number of reference frames encoding: Set by user.
int	chromaoffset
	chroma qp offset from luma encoding: Set by user.
int	bframebias
	Influences how often B-frames are used.
int	trellis
	trellis RD quantization encoding: Set by user.
float	complexityblur
	Reduce fluctuations in qp (before curve compression).
int	deblockalpha
	in-loop deblocking filter alphac0 parameter alpha is in the range -6.
int	deblockbeta
	in-loop deblocking filter beta parameter beta is in the range -6.
int	partitions
	macroblock subpartition sizes to consider - p8x8, p4x4, b8x8, i8x8, i4x4 encoding: Set by user.
int	directpred
	direct MV prediction mode - 0 (none), 1 (spatial), 2 (temporal) encoding: Set by user.
int	cutoff
	Audio cutoff bandwidth (0 means "automatic"), currently used only by FAAC.
int	scenechange_factor
	Multiplied by qscale for each frame and added to scene_change_score.
int	mv0_threshold
	Note: Value depends upon the compare function used for fullpel ME.
int	b_sensitivity
	Adjusts sensitivity of b_frame_strategy 1.
int	compression_level
	encoding: Set by user.
int	use_lpc
	Sets whether to use LPC mode - used by FLAC encoder.
int	lpc_coeff_precision
	LPC coefficient precision - used by FLAC encoder encoding: Set by user.
int	min_prediction_order
	encoding: Set by user.
int	max_prediction_order
	encoding: Set by user.
int	prediction_order_method
	search method for selecting prediction order encoding: Set by user.
int	min_partition_order
	encoding: Set by user.
int	max_partition_order
	encoding: Set by user.
int64_t	timecode_frame_start
	GOP timecode frame start number, in non drop frame format encoding: Set by user.
int	request_channels
	Decoder should decode to this many channels if it can (0 for default) encoding: unused decoding: Set by user.
int	xvmc_vld_hwslice
	XVMC_VLD (VIA CLE266) Hardware MPEG decoding encoding: forbidden decoding: set by decoder.
void(*	decode_cc_dvd )(struct AVCodecContext *c, const uint8_t *buf, int buf_size)
	Closed Caption decoder encoding: forbidden decoding: set by decoder.
void *	dvdv
	DVD Video (Mac OS X Hardware MPEG) decoding (originally by John Dagliesh http://www.defyne.org/dvb/accellent.html) encoding: forbidden decoding: set by decoder.

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Member Data Documentation

AVClass* AVCodecContext::av_class

information on struct for av_log

• set by avcodec_alloc_context

Definition at line 779 of file avcodec.h.

Referenced by avcodec_get_context_defaults2().

int AVCodecContext::bit_rate

the average bitrate

• encoding: Set by user; unused for constant quantizer encoding.

• decoding: Set by libavcodec. 0 or some bitrate if this info is available in the stream.

Definition at line 785 of file avcodec.h.

Referenced by a52_decode_frame(), ac3_decode_frame(), AC3_encode_init(), adx_decode_header(), amr_nb_encode_init(), amr_wb_encode_frame(), amr_wb_encode_init(), apc_read_header(), asf_read_header(), asf_write_header1(), atrac3_decode_init(), audio_encode_example(), av_add_stream(), av_estimate_timings_from_bit_rate(), av_new_stream(), avcodec_string(), avi_write_header(), avisynth_read_header(), MPEG2fixup::BuildFrame(), cin_read_header(), cook_decode_init(), daud_header(), dc1394_read_header(), dca_decode_frame(), decode_frame(), decode_frame_adu(), decode_frame_mp3on4(), decode_wave_header(), dnxhd_encode_init(), dv_extract_audio_info(), dv_extract_video_info(), dv_init_demux(), dv_offset_reset(), dv_produce_packet(), ea_read_header(), encode_init(), encode_mp2_audio(), Faac_encode_init(), ff_aac_ac3_parse(), ff_mpa_decode_header(), ff_parse_specific_params(), ff_wma_init(), ff_xvid_encode_init(), ff_xvid_rate_control_init(), ffm_read_header(), ffm_write_header(), film_read_header(), fourxm_read_header(), g726_init(), get_aiff_header(), get_audio_frame_size(), get_sindex(), get_wav_header(), getFileInfo(), grab_read_header(), gxf_write_header(), gxf_write_mpeg_auxiliary(), H263Container::H263StartEncoder(), idcin_read_header(), AudioOutputDigitalEncoder::Init(), avfDecoder::initialize(), ipmovie_read_header(), libgsm_init(), mmf_read_header(), mov_write_esds_tag(), mov_write_uuidprof_tag(), MP3lame_encode_init(), MPA_encode_init(), mpeg_decode_postinit(), mpeg_mux_init(), mpegps_read_packet(), mpegts_read_header(), mpegts_write_header(), mpegvideo_extract_headers(), MPV_encode_init(), mtv_read_header(), oggvorbis_init_encoder(), ogm_dshow_header(), ogm_header(), pcm_read_seek(), put_wav_header(), qdm2_decode_init(), AudioOutputBase::Reconfigure(), rm_read_header(), rm_write_header(), roq_read_header(), rv10_write_header(), AvFormatDecoder::ScanStreams(), seq_read_header(), AudioOutputBase::SetStretchFactorLocked(), NuppelVideoRecorder::SetupAVCodecVideo(), v4l2_read_header(), vid_read_header(), vid_read_packet(), video_encode_example(), vmd_read_header(), voc_get_packet(), vorbis_header(), wc3_read_header(), NuppelVideoRecorder::WriteHeader(), wsaud_read_header(), wsvqa_read_header(), x11grab_read_header(), and X264_init().

int AVCodecContext::bit_rate_tolerance

number of bits the bitstream is allowed to diverge from the reference.

the reference can be CBR (for CBR pass1) or VBR (for pass2)

• encoding: Set by user; unused for constant quantizer encoding.
• decoding: unused

Definition at line 793 of file avcodec.h.

Referenced by MPEG2fixup::BuildFrame(), ff_rate_estimate_qscale(), ffm_read_header(), ffm_write_header(), MPV_encode_init(), NuppelVideoRecorder::SetupAVCodecVideo(), and X264_init().

int AVCodecContext::flags

CODEC_FLAG_*.

• encoding: Set by user.
• decoding: Set by user.

Definition at line 800 of file avcodec.h.

Referenced by av_parser_change(), avcodec_default_get_buffer(), avcodec_string(), avi_write_header(), MPEG2fixup::BuildFrame(), common_init(), dct_get(), decode_frame(), dnxhd_decode_macroblock(), dnxhd_encode_init(), dsputil_init_mmx(), dv_encode_video_segment(), encode_frame(), encode_init(), encode_q_branch(), estimate_best_b_count(), Faac_encode_init(), ff_h263_decode_frame(), ff_mjpeg_decode_init(), ff_xvid_encode_init(), ffm_read_header(), ffm_write_header(), float_init_altivec(), get_flags(), h261_decode_frame(), halfpel_interpol(), idct_put(), indeo3_decode_frame(), NuppelDecoder::InitAVCodecVideo(), AvFormatDecoder::InitVideoCodec(), iv_decode_frame(), mjpeg_decode_scan(), mkv_write_header(), mkv_write_trailer(), mov_write_ilst_tag(), mov_write_udta_tag(), mp3_write_header(), MP3lame_encode_init(), mpeg_decode_frame(), mpeg_decode_init(), mpegts_add_stream(), MPV_common_init(), MPV_encode_init(), ogg_write_header(), oggvorbis_init_encoder(), AvFormatDecoder::ProcessDSMCCPacket(), remove_extradata(), render_slice(), NuppelVideoRecorder::SetupAVCodecVideo(), sp5x_decode_frame(), svq1_decode_init(), svq1_encode_plane(), svq3_decode_frame(), vc1_decode_init(), video_decode_example(), vorbis_encode_init(), vp3_decode_frame(), write_globalinfo(), and X264_init().

int AVCodecContext::sub_id

Some codecs need additional format info.

It is stored here. If any muxer uses this then ALL demuxers/parsers AND encoders for the specific codec MUST set it correctly otherwise stream copy breaks. In general use of this field by muxers is not recommanded.

• encoding: Set by libavcodec.
• decoding: Set by libavcodec. (FIXME: Is this OK?)

Definition at line 810 of file avcodec.h.

Referenced by avcodec_string(), decode_frame(), decode_frame_adu(), dvbsub_init_decoder(), ff_mpa_decode_header(), AvFormatDecoder::GetTrackDesc(), mpeg1_decode_sequence(), mpeg_decode_postinit(), mpeg_decode_sequence_extension(), AvFormatDecoder::MpegPreProcessPkt(), mpegts_add_stream(), mpegvideo_extract_headers(), AvFormatDecoder::ProcessDSMCCPacket(), rv10_decode_init(), rv20_decode_picture_header(), and vcr2_init_sequence().

int AVCodecContext::me_method

Motion estimation algorithm used for video coding.

1 (zero), 2 (full), 3 (log), 4 (phods), 5 (epzs), 6 (x1), 7 (hex), 8 (umh), 9 (iter) [7, 8 are x264 specific, 9 is snow specific]

• encoding: MUST be set by user.
• decoding: unused

Definition at line 819 of file avcodec.h.

Referenced by encode_blocks(), encode_frame(), encode_init(), ff_xvid_encode_init(), ffm_read_header(), ffm_write_header(), MPV_encode_init(), svq1_encode_plane(), and X264_init().

uint8_t* AVCodecContext::extradata

some codecs need / can use extradata like Huffman tables.

mjpeg: Huffman tables rv10: additional flags mpeg4: global headers (they can be in the bitstream or here) The allocated memory should be FF_INPUT_BUFFER_PADDING_SIZE bytes larger than extradata_size to avoid prolems if it is read with the bitstream reader. The bytewise contents of extradata must not depend on the architecture or CPU endianness.

• encoding: Set/allocated/freed by libavcodec.
• decoding: Set/allocated/freed by user.

Definition at line 832 of file avcodec.h.

Referenced by adpcm_decode_init(), adts_write_header(), alac_set_info(), apc_read_header(), ape_decode_init(), ape_read_header(), asf_read_header(), atrac3_decode_init(), av_close_input_file(), av_find_stream_info(), av_mpeg4_decode_header(), av_parser_change(), avi_read_header(), concatenate_packet(), cook_decode_init(), decode_ext_header(), decode_frame(), decode_header_trees(), decode_init(), decode_init_mp3on4(), decode_stream_header(), dump_extradata(), encode_end(), encode_ext_header(), encode_init(), Faac_encode_close(), Faac_encode_init(), faac_init_mp4(), ff_h263_decode_frame(), ff_mjpeg_decode_init(), ff_rm_read_mdpr_codecdata(), ff_xvid_encode_close(), ff_xvid_encode_init(), flac_decode_init(), flac_encode_close(), flac_encode_init(), flac_header(), flac_write_header(), flic_decode_init(), flic_read_header(), flv_set_video_codec(), flv_write_packet(), fourxm_read_header(), get_aac_sample_rates(), get_codec_data(), get_wav_header(), h263_encode_init(), h264_mp4toannexb_filter(), idcin_decode_init(), idcin_read_header(), NuppelDecoder::InitAVCodecVideo(), matroska_read_header(), mkv_write_codecprivate(), mov_read_avcC(), mov_read_esds(), mov_read_extradata(), mov_read_smi(), mov_read_wave(), mov_write_packet(), mp3_header_compress(), mp3_header_decompress(), mpc7_decode_init(), mpc8_decode_init(), mpc8_read_header(), mpc_read_header(), MPV_encode_end(), mxf_parse_structural_metadata(), nut_read_header(), nut_write_header(), ogg_write_header(), oggvorbis_encode_close(), oggvorbis_encode_init(), put_bmp_header(), put_flac_codecpriv(), put_wav_header(), put_xiph_codecpriv(), qdm2_decode_init(), rm_read_audio_stream_info(), rv10_decode_init(), rv20_decode_picture_header(), sdp_media_attributes(), sdp_parse_fmtp_config(), sdp_parse_fmtp_config_h264(), smacker_read_header(), sonic_decode_init(), sonic_encode_init(), svq3_decode_frame(), theora_decode_init(), theora_header(), tta_decode_init(), tta_read_header(), vc1_decode_init(), vmd_read_header(), vmdvideo_decode_init(), vorbis_decode_init(), vorbis_encode_close(), vorbis_encode_init(), vorbis_header(), vp6_parse_header(), vqa_decode_init(), wma_decode_init(), wmv2_encode_end(), wmv2_encode_init(), write_streamheader(), NuppelVideoRecorder::WriteHeader(), wsvqa_read_header(), X264_init(), and xvid_strip_vol_header().

int AVCodecContext::extradata_size

Definition at line 833 of file avcodec.h.

Referenced by adpcm_decode_init(), adts_write_header(), alac_decode_frame(), apc_read_header(), ape_decode_init(), ape_read_header(), asf_read_header(), asf_write_header1(), atrac3_decode_init(), av_find_stream_info(), av_mpeg4_decode_header(), av_parser_change(), avi_read_header(), concatenate_packet(), cook_decode_init(), decode_ext_header(), decode_frame(), decode_header_trees(), decode_init(), decode_init_mp3on4(), decode_stream_header(), dump_extradata(), encode_ext_header(), encode_init(), Faac_encode_init(), faac_init_mp4(), ff_h263_decode_frame(), ff_mjpeg_decode_init(), ff_rm_read_mdpr_codecdata(), ff_rtp_send_aac(), ff_xvid_encode_init(), flac_decode_init(), flac_encode_close(), flac_encode_init(), flac_header(), flac_write_header(), flic_decode_init(), flic_read_header(), flv_set_video_codec(), flv_write_packet(), fourxm_read_header(), get_aac_sample_rates(), get_codec_data(), get_wav_header(), h263_encode_init(), h264_mp4toannexb_filter(), idcin_decode_init(), idcin_read_header(), NuppelDecoder::InitAVCodecVideo(), matroska_read_header(), mkv_write_codecprivate(), mov_read_avcC(), mov_read_esds(), mov_read_extradata(), mov_read_smi(), mov_read_wave(), mov_write_packet(), mp3_header_compress(), mp3_header_decompress(), mpc7_decode_init(), mpc8_decode_init(), mpc8_read_header(), mpc_read_header(), mxf_parse_structural_metadata(), nut_read_header(), nut_write_header(), ogg_write_header(), oggvorbis_encode_init(), put_bmp_header(), put_flac_codecpriv(), put_wav_header(), put_xiph_codecpriv(), qdm2_decode_init(), rm_read_audio_stream_info(), rv10_decode_init(), rv20_decode_picture_header(), sdp_media_attributes(), sdp_parse_fmtp_config(), sdp_parse_fmtp_config_h264(), smacker_read_header(), sonic_decode_init(), sonic_encode_init(), svq3_decode_frame(), theora_decode_init(), theora_header(), tta_decode_init(), tta_read_header(), vc1_decode_init(), vmd_read_header(), vmdvideo_decode_init(), vorbis_decode_init(), vorbis_encode_init(), vorbis_header(), vp6_parse_header(), vqa_decode_init(), wma_decode_init(), wmv2_encode_end(), wmv2_encode_init(), write_streamheader(), NuppelVideoRecorder::WriteHeader(), wsvqa_read_header(), X264_init(), and xvid_strip_vol_header().

AVRational AVCodecContext::time_base

This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented.

For fixed-fps content, timebase should be 1/framerate and timestamp increments should be identically 1.

• encoding: MUST be set by user.
• decoding: Set by libavcodec.

Definition at line 843 of file avcodec.h.

Referenced by av_find_stream_info(), av_write_header(), avcodec_get_context_defaults2(), avcodec_string(), avi_write_header(), avs_read_packet(), MPEG2fixup::BuildFrame(), compute_frame_duration(), compute_pkt_fields2(), dc1394_read_header(), decode_seq_header(), decode_sequence_header_adv(), decode_slice_header(), decode_vol_header(), decode_vop_header(), dump_stream_format(), dv_extract_video_info(), ea_read_header(), encode_ext_header(), encode_init(), estimate_best_b_count(), ff_flv_encode_picture_header(), ff_h261_encode_picture_header(), ff_parse_specific_params(), ff_rate_control_init(), ff_rate_estimate_qscale(), ff_rm_read_mdpr_codecdata(), ff_set_mpeg4_time(), ff_vbv_update(), ff_xvid_encode_init(), ff_xvid_rate_control_init(), ff_xvid_rate_estimate_qscale(), ffm_read_header(), ffm_write_header(), ffm_write_packet(), find_frame_rate_index(), flv_write_header(), AvFormatDecoder::GetFrame(), gif_read_header(), gif_write_video(), grab_read_header(), gxf_write_header(), gxf_write_media_preamble(), h261_decode_picture_header(), h263_decode_picture_header(), h263_encode_picture_header(), H263Container::H263StartEncoder(), init_pass2(), matroska_read_header(), modify_qscale(), mov_write_header(), mov_write_uuidprof_tag(), mpeg4_encode_gop_header(), mpeg4_encode_picture_header(), mpeg4_encode_vol_header(), mpeg_decode_postinit(), mpegvideo_extract_headers(), mpegvideo_parse(), MPV_encode_init(), msmpeg4_encode_ext_header(), normalized_fps(), ogg_write_header(), oggvorbis_encode_frame(), ogm_dshow_header(), ogm_header(), rm_write_header(), rtp_write_header(), set_frame_distances(), NuppelVideoRecorder::SetupAVCodecVideo(), show_pict_info(), swf_read_packet(), swf_write_header(), theora_header(), txd_read_header(), v4l2_read_header(), video_encode_example(), x11grab_read_header(), X264_init(), xvid_correct_framerate(), and yuv4_generate_header().

int AVCodecContext::width

picture width / height.

• encoding: MUST be set by user.
• decoding: Set by libavcodec. Note: For compatibility it is possible to set this instead of coded_width/height before decoding.

Definition at line 853 of file avcodec.h.

Referenced by aasc_decode_frame(), alloc_blocks(), asf_read_header(), asf_write_header1(), av_write_header(), avcodec_default_get_buffer(), avcodec_default_reget_buffer(), avcodec_encode_video(), avcodec_open(), avcodec_set_dimensions(), avcodec_string(), avi_read_header(), avi_write_header(), avisynth_read_header(), avs_read_packet(), bethsoftvid_decode_frame(), bmp_decode_frame(), bmp_encode_frame(), MPEG2fixup::BuildFrame(), cin_read_header(), cinepak_decode(), cinepak_decode_init(), cinvideo_decode_frame(), cinvideo_decode_init(), codec_reinit(), common_init(), common_init_after_header(), MHIBitmap::CreateFromMPEG(), cyuv_decode_init(), dc1394_read_header(), decode_13(), decode_frame(), decode_i2_frame(), decode_i_frame(), decode_init(), decode_p_frame(), decode_seq_header(), decode_sequence_header_adv(), decode_slice_header(), decode_stream_header(), dnxhd_encode_init(), dnxhd_write_header(), dv_codec_profile(), dv_extract_video_info(), dv_write_pack(), dvbsub_parse_region_segment(), dxa_read_header(), encode_frame(), encode_init(), encode_picture_ls(), estimate_best_b_count(), ff_pnm_decode_header(), ff_print_debug_info(), ff_rm_read_mdpr_codecdata(), ff_xvid_encode_init(), ffm_read_header(), ffm_write_header(), film_read_header(), flashsv_decode_frame(), flashsv_encode_init(), flic_decode_frame_15_16BPP(), flic_decode_frame_8BPP(), flic_read_header(), flv_write_header(), fourxm_read_header(), frame_start(), getFileInfo(), AvFormatDecoder::GetFrame(), gif_encode_frame(), gif_read_header(), gif_write_header(), gif_write_video(), grab_read_header(), grabThumbnail(), H263Container::H263DecodeFrame(), H263Container::H263EncodeFrame(), H263Container::H263StartDecoder(), H263Container::H263StartEncoder(), AvFormatDecoder::H264PreProcessPkt(), halfpel_interpol(), has_codec_parameters(), idcin_decode_vlcs(), idcin_read_header(), img_read_header(), img_read_packet(), img_write_packet(), indeo3_decode_init(), ThumbFinder::initAVCodec(), NuppelDecoder::InitAVCodecVideo(), AvFormatDecoder::InitVideoCodec(), ipmovie_read_header(), ipvideo_decode_init(), ipvideo_decode_opcodes(), ir2_decode_frame(), matroska_read_header(), mkv_write_tracks(), mm_decode_init(), mm_decode_intra(), mm_read_header(), mov_read_stsd(), mov_write_avid_tag(), mov_write_tkhd_tag(), mov_write_uuidprof_tag(), mov_write_video_tag(), MPV_encode_init(), msrle_decode_pal4(), msvideo1_decode_16bit(), msvideo1_decode_8bit(), mtv_read_header(), mxf_parse_structural_metadata(), nsv_parse_NSVs_header(), nut_read_header(), nut_write_header(), nuv_header(), ogm_dshow_header(), ogm_header(), pam_encode_frame(), parse_h264_sdp_line(), PCMDEF(), pnm_decode_frame(), pnm_encode_frame(), pnm_parse(), ptx_decode_frame(), put_bmp_header(), qtrle_encode_frame(), qtrle_encode_init(), qtrle_encode_line(), raw_decode(), raw_encode(), raw_init_decoder(), raw_read_header(), read_header(), render_slice_xvmc(), roq_decode_frame(), roq_decode_init(), roq_encode_init(), roq_read_header(), rpza_decode_stream(), rv10_decode_init(), rv10_write_header(), rv20_decode_picture_header(), AvFormatDecoder::ScanStreams(), seq_read_header(), NuppelVideoRecorder::SetupAVCodecVideo(), siff_parse_vbv1(), smacker_read_header(), smc_decode_stream(), sp5x_decode_frame(), str_read_header(), svq1_decode_init(), svq1_encode_end(), svq1_encode_init(), svq3_decode_frame(), swf_write_header(), swf_write_video(), targa_encode_frame(), theora_header(), thp_read_header(), tiff_decode_tag(), tm2_decode_blocks(), truemotion1_decode_16bit(), truemotion1_decode_24bit(), txd_decode_frame(), ulti_decode_init(), v4l2_read_header(), vb_decode_framedata(), vc1_decode_init(), vid_read_header(), vid_read_packet(), video_decode_example(), video_encode_example(), vmd_decode(), vmd_read_header(), vp3_decode_init(), vp6_parse_header(), wc3_read_header(), write_streamheader(), wsvqa_read_header(), x11grab_read_header(), X264_init(), xan_decode_init(), xan_wc3_copy_pixel_run(), xan_wc3_decode_frame(), xan_wc3_output_pixel_run(), yuv4_generate_header(), yuv4_read_header(), yuv4_read_packet(), yuv4_write_packet(), and zmbv_me().

int AVCodecContext::height

Definition at line 853 of file avcodec.h.

Referenced by aasc_decode_frame(), alloc_blocks(), asf_read_header(), asf_write_header1(), av_write_header(), avcodec_default_get_buffer(), avcodec_default_reget_buffer(), avcodec_encode_video(), avcodec_open(), avcodec_set_dimensions(), avcodec_string(), avi_read_header(), avi_write_header(), avisynth_read_header(), avs_read_packet(), bethsoftvid_decode_frame(), bmp_decode_frame(), bmp_encode_frame(), MPEG2fixup::BuildFrame(), cin_read_header(), cinepak_decode_init(), cinvideo_decode_frame(), cinvideo_decode_init(), codec_reinit(), common_init(), common_init_after_header(), MHIBitmap::CreateFromMPEG(), cyuv_decode_init(), dc1394_read_header(), decode_13(), decode_frame(), decode_i2_frame(), decode_i_frame(), decode_init(), decode_p_block(), decode_p_frame(), decode_seq_header(), decode_sequence_header_adv(), decode_slice_header(), decode_stream_header(), dnxhd_encode_init(), dnxhd_write_header(), dv_codec_profile(), dv_extract_video_info(), dv_write_pack(), dxa_read_header(), encode_frame(), encode_init(), encode_picture_ls(), estimate_best_b_count(), ff_draw_horiz_band(), ff_pnm_decode_header(), ff_print_debug_info(), ff_rm_read_mdpr_codecdata(), ff_xvid_encode_init(), ffm_read_header(), ffm_write_header(), film_read_header(), flashsv_decode_frame(), flashsv_encode_init(), flic_decode_frame_15_16BPP(), flic_decode_frame_8BPP(), flic_read_header(), flip(), flv_write_header(), fourxm_read_header(), frame_start(), getFileInfo(), AvFormatDecoder::GetFrame(), gif_encode_frame(), gif_read_header(), gif_write_header(), gif_write_video(), grab_read_header(), grabThumbnail(), gxf_find_lines_index(), gxf_write_header(), gxf_write_mpeg_auxiliary(), H263Container::H263DecodeFrame(), H263Container::H263EncodeFrame(), H263Container::H263StartDecoder(), H263Container::H263StartEncoder(), AvFormatDecoder::H264PreProcessPkt(), halfpel_interpol(), idcin_decode_vlcs(), idcin_read_header(), img_read_header(), img_read_packet(), img_write_packet(), indeo3_decode_init(), ThumbFinder::initAVCodec(), NuppelDecoder::InitAVCodecVideo(), AvFormatDecoder::InitVideoCodec(), ipmovie_read_header(), ipvideo_decode_init(), ipvideo_decode_opcodes(), ir2_decode_frame(), matroska_read_header(), mkv_write_tracks(), mm_decode_init(), mm_read_header(), mov_find_video_codec_tag(), mov_read_stsd(), mov_write_avid_tag(), mov_write_tkhd_tag(), mov_write_uuidprof_tag(), mov_write_video_tag(), MPV_encode_init(), msrle_decode_pal4(), msrle_decode_pal8(), msvideo1_decode_16bit(), msvideo1_decode_8bit(), mtv_read_header(), mxf_parse_structural_metadata(), nsv_parse_NSVs_header(), nut_read_header(), nut_write_header(), nuv_header(), ogm_dshow_header(), ogm_header(), pam_encode_frame(), parse_h264_sdp_line(), PCMDEF(), pnm_decode_frame(), pnm_encode_frame(), pnm_parse(), ptx_decode_frame(), put_bmp_header(), qtrle_decode_16bpp(), qtrle_decode_24bpp(), qtrle_decode_32bpp(), qtrle_decode_4bpp(), qtrle_decode_8bpp(), qtrle_encode_frame(), qtrle_encode_init(), raw_decode(), raw_encode(), raw_init_decoder(), raw_read_header(), read_header(), roq_decode_frame(), roq_decode_init(), roq_encode_init(), roq_read_header(), rpza_decode_stream(), rv10_decode_init(), rv10_write_header(), rv20_decode_picture_header(), AvFormatDecoder::ScanStreams(), seq_read_header(), NuppelVideoRecorder::SetupAVCodecVideo(), siff_parse_vbv1(), smacker_read_header(), smc_decode_stream(), sp5x_decode_frame(), str_read_header(), svq1_decode_init(), svq1_encode_end(), svq1_encode_init(), svq3_decode_frame(), swf_write_header(), swf_write_video(), targa_encode_frame(), theora_header(), thp_read_header(), tiff_decode_tag(), tm2_decode_blocks(), truemotion1_decode_16bit(), truemotion1_decode_24bit(), txd_decode_frame(), ulti_decode_init(), v4l2_read_header(), vb_decode_framedata(), vc1_decode_init(), vid_read_header(), vid_read_packet(), video_decode_example(), video_encode_example(), vmd_decode(), vmd_read_header(), vp3_decode_init(), vp6_parse_header(), wc3_read_header(), write_streamheader(), wsvqa_read_header(), x11grab_read_header(), X264_init(), xan_decode_frame(), xan_decode_init(), xan_wc3_decode_frame(), yuv4_generate_header(), yuv4_read_header(), yuv4_read_packet(), yuv4_write_packet(), and zmbv_me().

int AVCodecContext::gop_size

the number of pictures in a group of pictures, or 0 for intra_only

• encoding: Set by user.

• decoding: unused

Definition at line 862 of file avcodec.h.

Referenced by MPEG2fixup::BuildFrame(), encode_frame(), encode_init(), ff_xvid_encode_init(), ffm_read_header(), ffm_write_header(), flashsv_encode_frame(), H263Container::H263StartEncoder(), MPV_encode_init(), qtrle_encode_frame(), roq_encode_frame(), NuppelVideoRecorder::SetupAVCodecVideo(), svq1_encode_frame(), video_encode_example(), and X264_init().

enum PixelFormat AVCodecContext::pix_fmt

Pixel format, see PIX_FMT_xxx.

• encoding: Set by user.
• decoding: Set by libavcodec.

Definition at line 869 of file avcodec.h.

Referenced by aasc_decode_init(), av_find_stream_info(), avcodec_align_dimensions(), avcodec_default_get_buffer(), avcodec_default_reget_buffer(), avcodec_get_context_defaults2(), avcodec_string(), avs_decode_init(), bethsoftvid_decode_init(), bmp_decode_frame(), MPEG2fixup::BuildFrame(), cinepak_decode_init(), cinvideo_decode_init(), MHIBitmap::CreateFromMPEG(), cyuv_decode_init(), dc1394_read_header(), decode_frame(), decode_init(), NuppelDecoder::DecodeFrame(), dnxhd_decode_frame(), dnxhd_encode_init(), dv_codec_profile(), dv_extract_video_info(), dvvideo_decode_frame(), dvvideo_encode_frame(), encode_frame(), encode_init(), encode_init_ls(), encode_picture_lossless(), encode_picture_ls(), estimate_best_b_count(), ff_cavs_init(), ff_h263_decode_init(), ff_mjpeg_decode_sof(), ff_mjpeg_encode_picture_header(), ff_pnm_decode_header(), ff_print_debug_info(), ff_xvid_encode_frame(), ffm_read_header(), ffm_write_header(), flashsv_decode_init(), flic_decode_frame(), flic_decode_init(), AvFormatDecoder::GetFrame(), ThumbFinder::getFrameImage(), gif_decode_frame(), gif_read_header(), gif_write_header(), grab_read_header(), grabThumbnail(), gxf_write_header(), gxf_write_mpeg_auxiliary(), gxf_write_umf_media_mpeg(), h261_decode_init(), H263Container::H263StartEncoder(), has_codec_parameters(), idcin_decode_init(), img_read_header(), indeo3_decode_init(), ipvideo_decode_init(), ir2_decode_init(), jpeg_put_comments(), load_input_picture(), mm_decode_init(), mov_find_video_codec_tag(), mpeg_mc_decode_init(), MPV_common_init(), MPV_encode_init(), msrle_decode_init(), msvideo1_decode_8bit(), msvideo1_decode_init(), pam_encode_frame(), parse_h264_sdp_line(), PCMDEF(), pnm_decode_frame(), pnm_encode_frame(), pnm_parse(), ptx_decode_frame(), qtrle_decode_init(), qtrle_encode_frame(), qtrle_encode_init(), raw_decode(), raw_encode(), raw_init_decoder(), raw_init_encoder(), raw_read_header(), read_header(), roq_decode_frame(), roq_decode_init(), rpza_decode_init(), rv10_decode_init(), AvFormatDecoder::ScanStreams(), seqvideo_decode_init(), NuppelVideoRecorder::SetupAVCodecVideo(), siff_parse_vbv1(), smacker_read_header(), smc_decode_init(), sp5x_decode_frame(), svq1_decode_init(), svq1_encode_frame(), targa_encode_frame(), tiff_decode_tag(), txd_decode_frame(), ulti_decode_init(), v4l2_read_header(), vc1_decode_init(), vcr2_init_sequence(), vid_read_header(), video_encode_example(), vmdvideo_decode_init(), vp3_decode_init(), vp56_init(), vqa_decode_init(), x11grab_read_header(), xan_decode_init(), yuv4_generate_header(), yuv4_read_header(), yuv4_read_packet(), yuv4_write_header(), and yuv4_write_packet().

int AVCodecContext::rate_emu

Frame rate emulation.

If not zero, the lower layer (i.e. format handler) has to read frames at native frame rate.

• encoding: Set by user.
• decoding: unused

Definition at line 877 of file avcodec.h.

Referenced by AvFormatDecoder::InitVideoCodec().

void(* AVCodecContext::draw_horiz_band)(struct AVCodecContext *s, const AVFrame *src, int offset[4], int y, int type, int height)

If non NULL, 'draw_horiz_band' is called by the libavcodec decoder to draw a horizontal band.

It improves cache usage. Not all codecs can do that. You must check the codec capabilities beforehand.

• encoding: unused
• decoding: Set by user.

  Parameters:

  	height	the height of the slice
  	y	the y position of the slice
  	type	1->top field, 2->bottom field, 3->frame
  	offset	offset into the AVFrame.data from which the slice should be read

Referenced by draw_slice(), ff_draw_horiz_band(), ff_init_block_index(), NuppelDecoder::InitAVCodecVideo(), AvFormatDecoder::InitVideoCodec(), and MPV_decode_mb_internal().

int AVCodecContext::sample_rate

samples per second

Definition at line 896 of file avcodec.h.

Referenced by a52_decode_frame(), ac3_decode_frame(), AC3_encode_init(), adpcm_encode_init(), adx_decode_header(), adx_encode_header(), aiff_read_header(), aiff_write_header(), amf_parse_object(), amr_decode_fix_avctx(), amr_nb_encode_init(), amr_read_header(), amr_wb_encode_init(), apc_read_header(), ape_read_header(), atrac3_decode_init(), au_read_header(), audio_encode_example(), audio_read_header(), audio_write_header(), AvFormatDecoder::AutoSelectAudioTrack(), av_write_header(), avcodec_string(), avisynth_read_header(), cdata_read_header(), cin_read_header(), compute_frame_duration(), cook_decode_init(), create_audio_stream(), create_vorbis_context(), daud_header(), dca_decode_frame(), decode_frame(), decode_frame_adu(), decode_frame_mp3on4(), decode_stream_header(), decode_wave_header(), dv_extract_audio_info(), dv_init_mux(), ea_read_header(), encode_init(), encode_mp2_audio(), faac_decode_frame(), faac_decode_init(), Faac_encode_init(), faac_init_mp4(), ff_aac_ac3_parse(), ff_parse_specific_params(), ff_wma_init(), ffm_read_header(), ffm_write_header(), ffm_write_packet(), film_read_header(), flac_encode_init(), flac_header(), flv_read_packet(), flv_set_audio_codec(), flv_write_header(), fourxm_read_header(), g726_init(), get_aiff_header(), get_audio_flags(), get_audio_frame_size(), get_codec_data(), get_sindex(), get_wav_header(), getFileInfo(), AvFormatDecoder::GetFrame(), gxf_write_header(), has_codec_parameters(), idcin_read_header(), AudioOutputDigitalEncoder::Init(), avfDecoder::initialize(), ipmovie_read_header(), libgsm_init(), matroska_read_header(), metadata_streaminfo(), mkv_write_tracks(), mm_read_header(), mmf_read_header(), mmf_write_header(), mmf_write_trailer(), mov_read_stsd(), mov_write_header(), mov_write_uuidprof_tag(), mp3_header_decompress(), MP3lame_encode_init(), MPA_encode_init(), mpc8_read_header(), mpc_read_header(), mpeg_mux_init(), mpegaudio_parse(), mpegps_read_packet(), mtv_read_header(), mxf_parse_structural_metadata(), nsv_read_chunk(), nut_read_header(), nut_write_header(), ogg_write_header(), oggvorbis_encode_frame(), oggvorbis_init_encoder(), ogm_dshow_header(), ogm_header(), pcm_read_seek(), put_au_header(), put_wav_header(), qdm2_decode_init(), raw_read_header(), AudioOutputBase::Reconfigure(), rm_read_audio_stream_info(), rm_write_header(), roq_dpcm_encode_init(), roq_read_header(), rtp_get_codec_info(), rtp_write_header(), rv10_write_header(), AvFormatDecoder::ScanStreams(), sdp_media_attributes(), sdp_parse_rtpmap(), seq_read_header(), AudioOutputBase::SetStretchFactorLocked(), AvFormatDecoder::SetupAudioStream(), smacker_read_header(), sol_read_header(), sonic_decode_init(), sonic_encode_init(), MPEG2fixup::Start(), str_read_header(), swf_write_header(), thp_read_header(), tta_decode_init(), tta_read_header(), vid_read_header(), vid_read_packet(), vmd_read_header(), vmdaudio_decode_init(), voc_get_packet(), voc_write_packet(), vorbis_decode_init(), vorbis_header(), wav_read_header(), wav_write_header(), wav_write_trailer(), wc3_read_header(), write_streamheader(), wsaud_read_header(), wsvqa_read_header(), and wv_read_header().

int AVCodecContext::channels

Definition at line 897 of file avcodec.h.

Referenced by a52_decode_frame(), ac3_decode_frame(), AC3_encode_init(), adpcm_compress_trellis(), adpcm_decode_frame(), adpcm_decode_init(), adpcm_encode_frame(), adpcm_encode_init(), adx_decode_frame(), adx_decode_header(), adx_encode_frame(), adx_encode_header(), adx_encode_init(), aiff_write_header(), alac_decode_init(), amf_parse_object(), amr_decode_fix_avctx(), amr_nb_decode_init(), amr_nb_encode_init(), amr_read_header(), amr_wb_decode_init(), amr_wb_encode_init(), apc_read_header(), ape_decode_frame(), ape_decode_init(), ape_read_header(), apply_window_and_mdct(), atrac3_decode_init(), au_read_header(), audio_encode_example(), audio_read_header(), audio_write_header(), AvFormatDecoder::AutoSelectAudioTrack(), avcodec_string(), avisynth_read_header(), cdata_read_header(), cin_read_header(), cook_decode_init(), create_audio_stream(), create_vorbis_context(), daud_header(), dca_decode_frame(), decode_frame(), decode_frame_adu(), decode_frame_mp3on4(), decode_init_mp3on4(), decode_stream_header(), decode_wave_header(), dpcm_decode_init(), dv_extract_audio_info(), dv_init_mux(), ea_read_header(), encode_init(), encode_mp2_audio(), faac_decode_frame(), Faac_encode_frame(), Faac_encode_init(), faac_init_mp4(), ff_aac_ac3_parse(), ff_mpa_decode_header(), ff_wma_init(), ffm_read_header(), ffm_write_header(), film_read_header(), filter_max_ch(), flac_encode_init(), flac_header(), flv_read_packet(), flv_write_header(), fourxm_read_header(), g726_init(), get_aiff_header(), get_audio_flags(), get_audio_frame_size(), get_codec_data(), get_sindex(), get_wav_header(), getFileInfo(), AvFormatDecoder::GetFrame(), AvFormatDecoder::GetTrackDesc(), gxf_write_header(), idcin_read_header(), AudioOutputDigitalEncoder::Init(), MPEG2fixup::InitAV(), avfDecoder::initialize(), ipmovie_read_header(), libgsm_init(), mace_decode_frame(), mace_decode_init(), matroska_read_header(), metadata_streaminfo(), mkv_write_tracks(), mm_read_header(), mmf_read_header(), mov_read_stsd(), mov_write_audio_tag(), mov_write_header(), mov_write_uuidprof_tag(), mp3_header_compress(), mp3_header_decompress(), MP3lame_encode_init(), MPA_encode_init(), mpc8_read_header(), mpc_read_header(), mpeg_mux_init(), mpegps_read_packet(), mxf_get_d10_aes3_packet(), mxf_parse_structural_metadata(), nsv_read_chunk(), nut_read_header(), nut_write_header(), oggvorbis_init_encoder(), ogm_dshow_header(), ogm_header(), pcm_encode_init(), pcm_read_seek(), put_au_header(), put_wav_header(), qdm2_decode_init(), raw_read_header(), AudioOutputBase::Reconfigure(), rm_read_audio_stream_info(), roq_dpcm_encode_frame(), roq_dpcm_encode_init(), roq_read_header(), rtp_get_codec_info(), rtp_get_payload_type(), rtp_write_packet(), rv10_write_header(), AvFormatDecoder::ScanStreams(), sdp_media_attributes(), sdp_parse_rtpmap(), seq_read_header(), AudioOutputBase::SetStretchFactorLocked(), AvFormatDecoder::SetupAudioStream(), smacker_read_header(), sol_read_header(), sonic_decode_init(), sonic_encode_init(), str_read_header(), swf_write_header(), thp_read_header(), tta_decode_init(), tta_read_header(), vid_read_header(), vid_read_packet(), vmd_read_header(), vmdaudio_decode_init(), voc_get_packet(), voc_write_packet(), vorbis_decode_init(), vorbis_encode_init(), vorbis_header(), wavpack_decode_frame(), wavpack_decode_init(), wc3_read_header(), write_streamheader(), wsaud_read_header(), wsvqa_read_header(), and wv_read_header().

enum SampleFormat AVCodecContext::sample_fmt

audio sample format

• encoding: Set by user.

• decoding: Set by libavcodec. sample format, currently unused

Definition at line 904 of file avcodec.h.

Referenced by avcodec_get_context_defaults2(), decode_init(), flac_encode_init(), mkv_write_tracks(), roq_dpcm_encode_init(), and tta_decode_init().

int AVCodecContext::frame_size

Samples per packet, initialized when calling 'init'.

Definition at line 910 of file avcodec.h.

Referenced by AC3_encode_init(), adpcm_encode_frame(), adpcm_encode_init(), adx_encode_frame(), adx_encode_init(), amr_decode_fix_avctx(), amr_nb_encode_init(), amr_wb_encode_init(), ape_read_header(), asf_read_header(), audio_encode_example(), avcodec_decode_audio2(), create_audio_stream(), decode_frame(), decode_frame_adu(), decode_frame_mp3on4(), encode_init(), encode_mp2_audio(), encode_superframe(), Faac_encode_frame(), Faac_encode_init(), ff_aac_ac3_parse(), ff_mpa_decode_header(), ff_parse_specific_params(), ffm_read_header(), ffm_write_header(), ffm_write_packet(), flac_encode_frame(), flac_encode_init(), get_audio_frame_size(), AudioOutputDigitalEncoder::Init(), libgsm_init(), mov_read_header(), mov_write_audio_tag(), mov_write_header(), MP3lame_encode_frame(), MP3lame_encode_init(), MPA_encode_init(), oggvorbis_encode_init(), pcm_encode_init(), put_wav_header(), rm_write_header(), roq_dpcm_encode_frame(), roq_dpcm_encode_init(), rtp_write_header(), rv10_write_header(), AudioOutputBase::SetStretchFactorLocked(), sonic_encode_init(), MPEG2fixup::Start(), swf_write_audio(), swf_write_header(), vorbis_encode_frame(), and vorbis_encode_init().

int AVCodecContext::frame_number

audio or video frame number

Definition at line 911 of file avcodec.h.

Referenced by avcodec_decode_audio2(), avcodec_decode_subtitle(), avcodec_decode_video(), avcodec_encode_audio(), avcodec_encode_subtitle(), avcodec_encode_video(), avcodec_open(), cook_decode_frame(), decode_frame(), encode_frame(), ff_h263_decode_frame(), flashsv_encode_frame(), gxf_write_trailer(), h261_decode_frame(), qtrle_encode_frame(), rv10_decode_frame(), svq1_encode_end(), svq1_encode_frame(), svq3_decode_frame(), swf_write_trailer(), and vc1_decode_frame().

int AVCodecContext::real_pict_num

Returns the real picture number of previous encoded frame.

Definition at line 912 of file avcodec.h.

Referenced by MPV_encode_picture().

int AVCodecContext::delay

Number of frames the decoded output will be delayed relative to the encoded input.

• encoding: Set by libavcodec.
• decoding: unused

Definition at line 920 of file avcodec.h.

Referenced by MPV_encode_init().

int AVCodecContext::avcodec_dual_language

set when bilingual audio data has been detected.

0 normally, 1 if dual language flag is set

• encoding: unused (called delay in this case...)
• decoding: set by lavc

Definition at line 929 of file avcodec.h.

Referenced by ff_mpa_decode_header(), AvFormatDecoder::GetFrame(), and AvFormatDecoder::ScanStreams().

float AVCodecContext::qcompress

amount of qscale change between easy & hard scenes (0.0-1.0)

Definition at line 932 of file avcodec.h.

Referenced by ffm_read_header(), ffm_write_header(), get_qscale(), and X264_init().

float AVCodecContext::qblur

amount of qscale smoothing over time (0.0-1.0)

Definition at line 933 of file avcodec.h.

Referenced by ff_rate_control_init(), ff_rate_estimate_qscale(), ffm_read_header(), ffm_write_header(), init_pass2(), NuppelVideoRecorder::SetupAVCodecVideo(), and X264_init().

int AVCodecContext::qmin

minimum quantizer

• encoding: Set by user.

• decoding: unused

Definition at line 940 of file avcodec.h.

Referenced by avcodec_string(), MPEG2fixup::BuildFrame(), encode_thread(), ff_init_qscale_tab(), ff_xvid_encode_init(), ff_xvid_rate_estimate_qscale(), ffm_read_header(), ffm_write_header(), init_pass2(), MPV_encode_init(), NuppelVideoRecorder::SetupAVCodecVideo(), update_qscale(), NuppelVideoRecorder::WriteHeader(), and X264_init().

int AVCodecContext::qmax

maximum quantizer

• encoding: Set by user.

• decoding: unused

Definition at line 947 of file avcodec.h.

Referenced by avcodec_string(), MPEG2fixup::BuildFrame(), dnxhd_encode_rdo(), dnxhd_find_qscale(), dnxhd_init_qmat(), dnxhd_init_rc(), encode_thread(), ff_init_qscale_tab(), ff_xvid_encode_init(), ff_xvid_rate_estimate_qscale(), ffm_read_header(), ffm_write_header(), init_pass2(), MPV_encode_init(), NuppelVideoRecorder::SetupAVCodecVideo(), update_qscale(), NuppelVideoRecorder::WriteHeader(), and X264_init().

int AVCodecContext::max_qdiff

maximum quantizer difference between frames

• encoding: Set by user.

• decoding: unused

Definition at line 954 of file avcodec.h.

Referenced by ffm_read_header(), ffm_write_header(), get_diff_limited_q(), NuppelVideoRecorder::SetupAVCodecVideo(), NuppelVideoRecorder::WriteHeader(), and X264_init().

int AVCodecContext::max_b_frames

maximum number of B-frames between non-B-frames Note: The output will be delayed by max_b_frames+1 relative to the input.

• encoding: Set by user.
• decoding: unused

Definition at line 962 of file avcodec.h.

Referenced by MPEG2fixup::BuildFrame(), compute_pkt_fields2(), decode_sequence_header(), decode_sequence_header_adv(), estimate_best_b_count(), ff_xvid_encode_init(), ffm_read_header(), ffm_write_header(), H263Container::H263StartEncoder(), MPV_encode_init(), NuppelVideoRecorder::SetupAVCodecVideo(), vc1_decode_init(), vc1_parse_frame_header(), video_encode_example(), and X264_init().

float AVCodecContext::b_quant_factor

qscale factor between IP and B-frames

• encoding: Set by user.

• decoding: unused

Definition at line 969 of file avcodec.h.

Referenced by ff_xvid_encode_init(), ff_xvid_rate_estimate_qscale(), ffm_read_header(), ffm_write_header(), get_diff_limited_q(), get_qminmax(), get_qscale(), NuppelVideoRecorder::SetupAVCodecVideo(), and X264_init().

int AVCodecContext::rc_strategy

obsolete FIXME remove

Definition at line 972 of file avcodec.h.

Referenced by ff_rate_control_init(), ff_rate_control_uninit(), ff_rate_estimate_qscale(), and NuppelVideoRecorder::SetupAVCodecVideo().

int AVCodecContext::b_frame_strategy

Definition at line 975 of file avcodec.h.

Referenced by MPV_encode_init(), select_input_picture(), NuppelVideoRecorder::SetupAVCodecVideo(), and X264_init().

int AVCodecContext::hurry_up

hurry up amount

• encoding: unused
• decoding: Set by user.

1-> Skip B-frames, 2-> Skip IDCT/dequant too, 5-> Skip everything except header

Deprecated:

Deprecated in favor of skip_idct and skip_frame.

Definition at line 983 of file avcodec.h.

Referenced by ff_h263_decode_frame(), h261_decode_frame(), mpeg_decode_frame(), svq1_decode_frame(), svq3_decode_frame(), and vc1_decode_frame().

struct AVCodec* AVCodecContext::codec [read]

Definition at line 985 of file avcodec.h.

Referenced by adpcm_compress_trellis(), adpcm_decode_frame(), adpcm_decode_init(), adpcm_encode_frame(), adpcm_encode_init(), av_find_stream_info(), av_remove_stream(), avcodec_close(), avcodec_decode_audio2(), avcodec_decode_subtitle(), avcodec_decode_video(), avcodec_encode_audio(), avcodec_encode_subtitle(), avcodec_encode_video(), avcodec_flush_buffers(), avcodec_open(), AvFormatDecoder::CloseCodecs(), common_init(), context_to_name(), dpcm_decode_frame(), dpcm_decode_init(), dsputil_init_mmx(), encode_init(), ff_h263_decode_init(), ff_wma_init(), AvFormatDecoder::GetFrame(), AvFormatDecoder::GetTrackDesc(), h261_decode_init(), mace_decode_frame(), mjpeg_decode_scan(), mov_write_video_tag(), mpeg_decode_init(), MPV_encode_init(), pcm_decode_frame(), pcm_decode_init(), pcm_encode_frame(), pcm_encode_init(), AvFormatDecoder::ScanStreams(), AvFormatDecoder::SeekReset(), sonic_encode_init(), svq1_decode_init(), try_decode_frame(), vp56_add_predictors_dc(), vp56_decode_4mv(), vp6_decode_init(), wma_decode_init(), xan_decode_frame(), and xan_decode_init().

void* AVCodecContext::priv_data

Definition at line 987 of file avcodec.h.

Referenced by a52_decode_end(), a52_decode_frame(), a52_decode_init(), aasc_decode_end(), aasc_decode_frame(), aasc_decode_init(), ac3_decode_end(), ac3_decode_frame(), ac3_decode_init(), AC3_encode_frame(), AC3_encode_init(), adpcm_decode_frame(), adpcm_decode_init(), adpcm_encode_frame(), adx_decode_frame(), adx_encode_frame(), alac_decode_close(), alac_decode_frame(), alac_decode_init(), amr_nb_decode_close(), amr_nb_decode_frame(), amr_nb_decode_init(), amr_nb_encode_close(), amr_nb_encode_frame(), amr_nb_encode_init(), amr_wb_decode_close(), amr_wb_decode_frame(), amr_wb_decode_init(), amr_wb_encode_close(), amr_wb_encode_frame(), amr_wb_encode_init(), ape_decode_close(), ape_decode_frame(), ape_decode_init(), apply_window_and_mdct(), atrac3_decode_close(), atrac3_decode_frame(), atrac3_decode_init(), avcodec_close(), avcodec_open(), avs_decode_frame(), bethsoftvid_decode_end(), bethsoftvid_decode_frame(), bethsoftvid_decode_init(), bmp_decode_end(), bmp_decode_frame(), bmp_decode_init(), bmp_encode_frame(), bmp_encode_init(), cavs_decode_frame(), cavs_flush(), cinaudio_decode_frame(), cinaudio_decode_init(), cinepak_decode_end(), cinepak_decode_frame(), cinepak_decode_init(), cinvideo_decode_end(), cinvideo_decode_frame(), cinvideo_decode_init(), codec_reinit(), common_end(), common_init(), common_init_after_header(), cook_decode_close(), cook_decode_frame(), cook_decode_init(), cyuv_decode_frame(), cyuv_decode_init(), dca_decode_frame(), dca_decode_init(), decode_block(), decode_close_mp3on4(), decode_end(), decode_entry_point(), decode_frame(), decode_frame_adu(), decode_frame_mp3on4(), decode_init(), decode_init_mp3on4(), decode_sequence_header(), decode_tag(), dnxhd_decode_close(), dnxhd_decode_frame(), dnxhd_decode_init(), dnxhd_encode_end(), dnxhd_encode_init(), dnxhd_encode_picture(), dnxhd_write_header(), dpcm_decode_frame(), dpcm_decode_init(), dv_decode_mt(), dv_encode_mt(), dvbsub_close_decoder(), dvbsub_decode(), dvbsub_display_end_segment(), dvbsub_encode(), dvbsub_init_decoder(), dvbsub_parse_clut_segment(), dvbsub_parse_object_segment(), dvbsub_parse_page_segment(), dvbsub_parse_pixel_data_block(), dvbsub_parse_region_segment(), dvvideo_close(), dvvideo_decode_frame(), dvvideo_encode_frame(), dvvideo_init(), encode_close(), encode_end(), encode_frame(), encode_init(), encode_init_ls(), encode_picture_lossless(), encode_picture_ls(), encode_superframe(), faac_decode_end(), faac_decode_frame(), faac_decode_init(), Faac_encode_close(), Faac_encode_frame(), Faac_encode_init(), faac_init_mp4(), ff_cavs_end(), ff_cavs_init(), ff_h263_decode_end(), ff_h263_decode_frame(), ff_h263_decode_init(), ff_mjpeg_decode_init(), ff_mpeg_flush(), ff_wma_end(), ff_wma_init(), ff_xvid_encode_close(), ff_xvid_encode_frame(), ff_xvid_encode_init(), flac_decode_close(), flac_decode_frame(), flac_decode_init(), flac_encode_frame(), flac_encode_init(), flac_flush(), flashsv_decode_end(), flashsv_decode_frame(), flashsv_decode_init(), flashsv_encode_end(), flashsv_encode_frame(), flashsv_encode_init(), flic_decode_end(), flic_decode_frame_15_16BPP(), flic_decode_frame_8BPP(), flic_decode_init(), flush(), flush_dpb(), g726_decode_frame(), g726_encode_frame(), g726_init(), gif_decode_close(), gif_decode_frame(), gif_decode_init(), gif_encode_frame(), gif_encode_init(), h261_decode_end(), h261_decode_frame(), h261_decode_init(), idcin_decode_end(), idcin_decode_frame(), idcin_decode_init(), imc_decode_close(), imc_decode_frame(), imc_decode_init(), indeo3_decode_end(), indeo3_decode_frame(), indeo3_decode_init(), ipvideo_decode_end(), ipvideo_decode_frame(), ipvideo_decode_init(), ir2_decode_frame(), ir2_decode_init(), libgsm_close(), libgsm_decode_frame(), libgsm_encode_frame(), libgsm_init(), mace_decode_frame(), mdec_common_init(), mjpegb_decode_frame(), mm_decode_end(), mm_decode_frame(), mm_decode_init(), MP3lame_encode_close(), MP3lame_encode_frame(), MP3lame_encode_init(), MPA_encode_frame(), MPA_encode_init(), mpc7_decode_flush(), mpc7_decode_frame(), mpc7_decode_init(), mpc8_decode_frame(), mpc8_decode_init(), mpeg1_decode_picture(), mpeg1_decode_sequence(), mpeg_decode_end(), mpeg_decode_extension(), mpeg_decode_frame(), mpeg_decode_gop(), mpeg_decode_init(), mpeg_decode_postinit(), mpeg_decode_user_data(), mpeg_dvdv_decode_init(), mpeg_mc_decode_init(), mpeg_xvmc_vld_decode_init(), MPV_encode_end(), MPV_encode_init(), MPV_encode_picture(), msrle_decode_end(), msrle_decode_frame(), msrle_decode_init(), msvideo1_decode_end(), msvideo1_decode_frame(), msvideo1_decode_init(), oggvorbis_encode_close(), oggvorbis_encode_frame(), oggvorbis_encode_init(), pam_encode_frame(), pcm_decode_frame(), pcm_decode_init(), png_dec_init(), png_enc_init(), pnm_decode_frame(), pnm_encode_frame(), ptx_decode_frame(), ptx_end(), ptx_init(), qdm2_decode_close(), qdm2_decode_frame(), qdm2_decode_init(), qtrle_decode_end(), qtrle_decode_frame(), qtrle_decode_init(), qtrle_encode_end(), qtrle_encode_frame(), qtrle_encode_init(), ra144_decode_frame(), ra144_decode_init(), ra288_decode_init(), raw_close_decoder(), raw_decode(), raw_init_decoder(), raw_init_encoder(), read_huffman_tree(), roq_decode_end(), roq_decode_frame(), roq_decode_init(), roq_dpcm_encode_frame(), roq_dpcm_encode_init(), roq_encode_end(), roq_encode_frame(), roq_encode_init(), rpza_decode_end(), rpza_decode_frame(), rpza_decode_init(), rv10_decode_end(), rv10_decode_frame(), rv10_decode_init(), rv10_decode_packet(), seqvideo_decode_end(), seqvideo_decode_frame(), seqvideo_decode_init(), sgi_end(), sgi_init(), shorten_decode_close(), shorten_decode_frame(), shorten_decode_init(), shorten_flush(), slice_end(), smc_decode_end(), smc_decode_frame(), smc_decode_init(), sonic_decode_close(), sonic_decode_frame(), sonic_decode_init(), sonic_encode_close(), sonic_encode_frame(), sonic_encode_init(), sp5x_decode_frame(), svq1_decode_end(), svq1_decode_frame(), svq1_decode_init(), svq1_encode_end(), svq1_encode_frame(), svq1_encode_init(), svq3_decode_frame(), targa_end(), targa_init(), theora_decode_header(), theora_decode_init(), theora_decode_tables(), tiff_end(), tiff_init(), truemotion1_decode_end(), truemotion1_decode_frame(), truespeech_decode_frame(), tta_decode_close(), tta_decode_frame(), tta_decode_init(), txd_decode_frame(), txd_end(), txd_init(), ulti_decode_frame(), ulti_decode_init(), vc1_decode_end(), vc1_decode_frame(), vc1_decode_init(), vcr2_init_sequence(), vmdaudio_decode_frame(), vmdaudio_decode_init(), vmdvideo_decode_end(), vmdvideo_decode_frame(), vmdvideo_decode_init(), vorbis_decode_close(), vorbis_decode_frame(), vorbis_decode_init(), vorbis_encode_close(), vorbis_encode_frame(), vorbis_encode_init(), vp3_decode_end(), vp3_decode_frame(), vp3_decode_init(), vp56_decode_frame(), vp56_free(), vp56_init(), vp56_size_changed(), vp5_decode_init(), vp6_decode_init(), vqa_decode_end(), vqa_decode_frame(), vqa_decode_init(), wavpack_decode_frame(), wavpack_decode_init(), wma_decode_init(), wma_decode_superframe(), wmv2_decode_init(), wmv2_encode_init(), X264_close(), X264_frame(), X264_init(), xan_decode_end(), xan_decode_frame(), and xan_decode_init().

int AVCodecContext::rtp_mode

Definition at line 991 of file avcodec.h.

int AVCodecContext::rtp_payload_size

Definition at line 994 of file avcodec.h.

Referenced by encode_thread(), and MPV_encode_init().

void(* AVCodecContext::rtp_callback)(struct AVCodecContext *avctx, void *data, int size, int mb_nb)

Referenced by encode_thread().

int AVCodecContext::mv_bits

Definition at line 1011 of file avcodec.h.

Referenced by encode_frame(), and MPV_encode_picture().

int AVCodecContext::header_bits

Definition at line 1012 of file avcodec.h.

Referenced by MPV_encode_picture().

int AVCodecContext::i_tex_bits

Definition at line 1013 of file avcodec.h.

Referenced by MPV_encode_picture().

int AVCodecContext::p_tex_bits

Definition at line 1014 of file avcodec.h.

Referenced by encode_frame(), and MPV_encode_picture().

int AVCodecContext::i_count

Definition at line 1015 of file avcodec.h.

Referenced by MPV_encode_picture().

int AVCodecContext::p_count

Definition at line 1016 of file avcodec.h.

Referenced by MPV_encode_picture().

int AVCodecContext::skip_count

Definition at line 1017 of file avcodec.h.

Referenced by MPV_encode_picture().

int AVCodecContext::misc_bits

Definition at line 1018 of file avcodec.h.

Referenced by encode_frame(), and MPV_encode_picture().

int AVCodecContext::frame_bits

number of bits used for the previously encoded frame

• encoding: Set by libavcodec.

• decoding: unused

Definition at line 1025 of file avcodec.h.

Referenced by encode_frame(), and MPV_encode_picture().

void* AVCodecContext::opaque

Private data of the user, can be used to carry app specific stuff.

• encoding: Set by user.
• decoding: Set by user.

Definition at line 1032 of file avcodec.h.

Referenced by decode_cc_dvd(), AvFormatDecoderPrivate::DecodeMPEG2Video(), get_avf_buffer(), get_avf_buffer_xvmc(), get_nuppel_buffer(), NuppelDecoder::InitAVCodecVideo(), AvFormatDecoder::InitVideoCodec(), release_avf_buffer(), release_avf_buffer_xvmc(), release_nuppel_buffer(), and render_slice_xvmc().

char AVCodecContext::codec_name[32]

Definition at line 1034 of file avcodec.h.

Referenced by asf_write_header1(), avcodec_string(), mov_read_stsd(), and rm_read_audio_stream_info().

enum CodecType AVCodecContext::codec_type

Definition at line 1035 of file avcodec.h.

Referenced by aac_read_header(), ac3_read_header(), amr_read_header(), apc_read_header(), ape_read_header(), asf_read_header(), asf_read_packet(), asf_write_header1(), asf_write_packet(), au_read_header(), audio_read_header(), av_find_default_stream_index(), av_find_stream_info(), av_interleaved_write_frame(), av_write_header(), avcodec_get_context_defaults2(), avcodec_string(), avi_read_header(), avi_read_packet(), avi_write_counters(), avi_write_header(), avi_write_idx1(), avi_write_ix(), avi_write_packet(), avi_write_trailer(), avisynth_read_header(), avs_read_packet(), build_frame_code(), cdata_read_header(), cin_read_header(), compute_frame_duration(), compute_pkt_fields2(), create_audio_stream(), create_stream(), daud_header(), dc1394_read_header(), decode_stream_header(), AvFormatDecoder::DoFastForward(), dts_read_header(), dump_stream_format(), dv_assemble_frame(), dv_extract_audio_info(), dv_init_demux(), dv_init_mux(), dxa_read_header(), ea_read_header(), ff_parse_specific_params(), ff_rm_parse_packet(), ff_rm_read_mdpr_codecdata(), ffm_read_header(), ffm_write_header(), ffm_write_packet(), film_read_header(), flac_header(), flac_read_header(), flic_read_header(), flv_read_metabody(), flv_write_header(), flv_write_packet(), fourxm_read_header(), get_aiff_header(), get_sindex(), get_wav_header(), getFileInfo(), MPEG2fixup::GetFrame(), AvFormatDecoder::GetFrame(), gif_read_header(), gif_write_header(), gif_write_packet(), grab_read_header(), grabThumbnail(), gxf_interleave_packet(), gxf_write_header(), gxf_write_media_packet(), gxf_write_media_preamble(), gxf_write_trailer(), has_codec_parameters(), idcin_read_header(), img_read_header(), init_stream(), MPEG2fixup::InitAV(), ThumbFinder::initAVCodec(), avfDecoder::initialize(), AvFormatDecoder::InitVideoCodec(), ipmovie_read_header(), is_intra_only(), matroska_read_header(), mkv_write_codecprivate(), mkv_write_packet(), mkv_write_tracks(), mm_read_header(), mmf_read_header(), mov_build_index(), mov_read_hdlr(), mov_read_header(), mov_read_stsd(), mov_read_trak(), mov_write_esds_tag(), mov_write_hdlr_tag(), mov_write_header(), mov_write_minf_tag(), mov_write_packet(), mov_write_stbl_tag(), mov_write_stsd_tag(), mov_write_stts_tag(), mov_write_tkhd_tag(), mp3_read_header(), mpc8_read_header(), mpc_read_header(), mpeg_mux_init(), mpeg_mux_write_packet(), mpegps_read_packet(), mpegts_add_stream(), mpegts_read_header(), mpegts_write_header(), mpegts_write_packet(), mpegts_write_pes(), mpegts_write_pmt(), mtv_read_header(), mxf_parse_structural_metadata(), nsv_parse_NSVs_header(), nut_read_header(), nut_write_header(), nuv_header(), ogg_write_header(), ogm_dshow_header(), ogm_header(), old_flac_header(), output_packet(), raw_read_header(), read_header(), read_packet(), AvFormatDecoder::RemoveAudioStreams(), rm_read_audio_stream_info(), rm_read_dts(), rm_read_header(), rm_write_header(), rm_write_packet(), roq_read_header(), rtp_get_codec_info(), rtp_write_header(), rv10_write_header(), AvFormatDecoder::ScanStreams(), sdp_parse_line(), sdp_parse_rtpmap(), sdp_write_media(), seq_read_header(), shorten_read_header(), siff_parse_vbv1(), smacker_read_header(), sol_read_header(), str_read_header(), swf_read_packet(), swf_write_header(), swf_write_packet(), swf_write_trailer(), theora_header(), thp_read_header(), try_decode_frame(), tta_read_header(), txd_read_header(), v4l2_read_header(), vid_read_header(), video_read_header(), vmd_read_header(), voc_read_header(), voc_write_header(), vorbis_header(), wc3_read_header(), write_streamheader(), wsaud_read_header(), wsvqa_read_header(), wv_read_header(), x11grab_read_header(), and yuv4_read_header().

enum CodecID AVCodecContext::codec_id

Definition at line 1036 of file avcodec.h.

Referenced by aac_read_header(), ac3_read_header(), aiff_read_header(), aiff_write_header(), amf_parse_object(), amr_decode_fix_avctx(), amr_read_header(), amr_read_packet(), amr_write_header(), apc_read_header(), ape_read_header(), asf_read_header(), asf_read_packet(), asf_write_header1(), au_read_header(), audio_read_header(), AvFormatDecoder::AutoSelectAudioTrack(), av_find_stream_info(), av_read_frame_internal(), av_write_header(), avcodec_align_dimensions(), avcodec_open(), avcodec_string(), avi_read_header(), avi_write_trailer(), avisynth_read_header(), avs_read_packet(), cdata_read_header(), cin_read_header(), create_audio_stream(), daud_header(), dc1394_read_header(), decode_frame(), decode_init(), decode_mb(), decode_stream_header(), AvFormatDecoder::DoFastForward(), dts_read_header(), dv_extract_audio_info(), dv_init_demux(), dv_init_mux(), dxa_read_header(), ea_read_header(), encode_frame(), encode_init(), encode_mb(), estimate_best_b_count(), ff_aac_ac3_parse(), ff_mjpeg_encode_picture_header(), ff_pnm_decode_header(), ff_rm_parse_packet(), ff_rm_read_mdpr_codecdata(), ff_rm_retrieve_cache(), ff_xvid_encode_init(), ffm_read_header(), ffm_write_header(), film_read_header(), filter_max_ch(), finalize_packet(), flac_header(), flac_read_header(), flic_read_header(), flv_read_packet(), flv_set_audio_codec(), flv_set_video_codec(), flv_write_header(), flv_write_packet(), fourxm_read_header(), get_aiff_header(), get_audio_flags(), get_audio_frame_size(), get_codec_data(), get_sindex(), get_wav_header(), AvFormatDecoder::GetFrame(), MPEG2fixup::GetStreamType(), AvFormatDecoder::GetTrackDesc(), gif_read_header(), grab_read_header(), grabThumbnail(), gxf_write_header(), gxf_write_media_packet(), gxf_write_media_preamble(), gxf_write_track_description(), gxf_write_umf_media_description(), gxf_write_umf_media_mpeg(), gxf_write_umf_track_description(), H263Container::H263StartDecoder(), has_codec_parameters(), idcin_read_header(), img_read_header(), img_read_packet(), img_write_packet(), imx_dump_header(), init_stream(), MPEG2fixup::InitAV(), NuppelDecoder::InitAVCodecAudio(), NuppelDecoder::InitAVCodecVideo(), avfDecoder::initialize(), AvFormatDecoder::InitVideoCodec(), ipmovie_read_header(), is_intra_only(), libgsm_decode_frame(), libgsm_encode_frame(), libgsm_init(), matroska_parse_block(), matroska_read_header(), mjpega_dump_header(), mkv_write_codecprivate(), mkv_write_tracks(), mm_read_header(), mmf_read_header(), mov_build_index(), mov_find_audio_codec_tag(), mov_find_video_codec_tag(), mov_read_enda(), mov_read_esds(), mov_read_hdlr(), mov_read_stsd(), mov_read_wave(), mov_write_audio_tag(), mov_write_esds_tag(), mov_write_header(), mov_write_packet(), mov_write_udta_tag(), mov_write_uuidprof_tag(), mov_write_video_tag(), mov_write_wave_tag(), mp3_read_header(), mpc8_read_header(), mpc_read_header(), mpeg1_decode_sequence(), mpeg_decode_sequence_extension(), mpeg_mux_init(), mpegps_read_packet(), mpegts_add_stream(), mpegts_read_header(), mpegts_write_pes(), mpegts_write_pmt(), mpegvideo_extract_headers(), MPV_encode_init(), mtv_read_header(), mxf_parse_structural_metadata(), nsv_parse_NSVs_header(), nsv_read_chunk(), nut_read_header(), nut_write_header(), nuv_header(), ogg_write_header(), ogg_write_packet(), ogg_write_trailer(), ogm_dshow_header(), ogm_header(), old_flac_header(), pcm_decode_frame(), pcm_read_seek(), put_wav_header(), put_xiph_codecpriv(), raw_read_header(), read_header(), AudioOutputBase::Reconfigure(), remove_extradata(), rm_ac3_swap_bytes(), rm_read_audio_stream_info(), rm_read_packet(), roq_read_header(), rtp_get_codec_info(), rtp_get_payload_type(), rtp_parse_open(), rtp_parse_packet(), rtp_write_header(), rtp_write_packet(), rv10_decode_init(), rv10_write_header(), AvFormatDecoder::ScanStreams(), sdp_media_attributes(), sdp_parse_fmtp_config(), sdp_parse_fmtp_config_h264(), sdp_parse_rtpmap(), seq_read_header(), set_codec_from_probe_data(), AudioOutputBase::SetStretchFactorLocked(), AvFormatDecoder::SetupAudioStream(), shorten_read_header(), siff_parse_vbv1(), smacker_read_header(), sol_read_header(), sp5x_decode_frame(), str_read_header(), swf_read_packet(), swf_write_header(), theora_header(), thp_read_header(), try_decode_frame(), tta_read_header(), txd_read_header(), v4l2_read_header(), vc1_decode_frame(), vc1_decode_init(), vcr2_init_sequence(), vid_read_header(), video_read_header(), vmd_read_header(), voc_get_packet(), vorbis_header(), wav_read_seek(), wc3_read_header(), wsaud_read_header(), wsvqa_read_header(), wv_read_header(), x11grab_read_header(), yuv4_generate_header(), and yuv4_read_header().

unsigned int AVCodecContext::codec_tag

fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').

This is used to work around some encoder bugs. A demuxer should set this to what is stored in the field used to identify the codec. If there are multiple such fields in a container then the demuxer should choose the one which maximizes the information about the used codec. If the codec tag field in a container is larger then 32 bits then the demuxer should remap the longer ID to 32 bits with a table or other structure. Alternatively a new extra_codec_tag + size could be added but for this a clear advantage must be demonstrated first.

• encoding: Set by user, if not then the default based on codec_id will be used.
• decoding: Set by user, will be converted to uppercase by libavcodec during init.

Definition at line 1051 of file avcodec.h.

Referenced by aiff_write_header(), amr_read_header(), ape_read_header(), asf_read_header(), asf_write_header1(), au_read_header(), av_find_stream_info(), av_write_header(), avcodec_string(), avi_read_header(), avi_write_header(), avisynth_read_header(), cdata_read_header(), cin_read_header(), daud_header(), decode_frame(), decode_init(), decode_stream_header(), dpcm_decode_frame(), dpcm_decode_init(), ea_read_header(), ff_rm_read_mdpr_codecdata(), ff_xvid_encode_init(), ffm_read_header(), ffm_write_header(), film_read_header(), flic_read_header(), flip(), flv_read_packet(), flv_set_audio_codec(), flv_set_video_codec(), flv_write_header(), flv_write_packet(), fourxm_read_header(), get_aiff_header(), get_audio_flags(), get_codec_data(), get_wav_header(), idcin_read_header(), ipmovie_read_header(), matroska_read_header(), mkv_write_codecprivate(), mm_read_header(), mov_find_audio_codec_tag(), mov_find_video_codec_tag(), mov_read_stsd(), mpeg_decode_frame(), MPV_common_init(), mtv_read_header(), nsv_parse_NSVs_header(), nut_read_header(), nut_write_header(), ogm_header(), put_au_header(), put_bmp_header(), put_wav_header(), raw_decode(), raw_init_decoder(), raw_init_encoder(), roq_read_header(), seq_read_header(), siff_parse_vbv1(), smacker_read_header(), sol_read_header(), str_read_header(), thp_read_header(), vmd_read_header(), voc_write_packet(), vp3_decode_init(), wav_write_header(), wav_write_trailer(), wc3_read_header(), write_streamheader(), wsaud_read_header(), and wsvqa_read_header().

int AVCodecContext::workaround_bugs

Work around bugs in encoders which sometimes cannot be detected automatically.

• encoding: Set by user
• decoding: Set by user

Definition at line 1058 of file avcodec.h.

Referenced by decode_init(), ff_h263_decode_init(), ff_mpeg4_set_direct_mv(), and AvFormatDecoder::InitVideoCodec().

int AVCodecContext::luma_elim_threshold

luma single coefficient elimination threshold

• encoding: Set by user.

• decoding: unused

Definition at line 1081 of file avcodec.h.

Referenced by ffm_read_header(), ffm_write_header(), and MPV_encode_init().

int AVCodecContext::chroma_elim_threshold

chroma single coeff elimination threshold

• encoding: Set by user.

• decoding: unused

Definition at line 1088 of file avcodec.h.

Referenced by ffm_read_header(), ffm_write_header(), and MPV_encode_init().

int AVCodecContext::strict_std_compliance

strictly follow the standard (MPEG4, .

..).

• encoding: Set by user.
• decoding: unused

Definition at line 1095 of file avcodec.h.

Referenced by decode_frame(), encode_init(), ff_fix_long_p_mvs(), ff_get_best_fcode(), ffm_read_header(), ffm_write_header(), find_frame_rate_index(), g726_init(), mp3_header_compress(), MPV_encode_init(), and NuppelVideoRecorder::SetupAVCodecVideo().

float AVCodecContext::b_quant_offset

qscale offset between IP and B-frames If > 0 then the last P-frame quantizer will be used (q= lastp_q*factor+offset).

If < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset).

• encoding: Set by user.
• decoding: unused

Definition at line 1109 of file avcodec.h.

Referenced by ff_xvid_encode_init(), ff_xvid_rate_estimate_qscale(), ffm_read_header(), ffm_write_header(), get_diff_limited_q(), get_qminmax(), and get_qscale().

int AVCodecContext::error_resilience

Error resilience; higher values will detect more errors but may misdetect some more or less valid parts as errors.

• encoding: unused
• decoding: Set by user.

Definition at line 1117 of file avcodec.h.

Referenced by ac3_decode_frame(), decode_init(), execute_decode_slices(), NuppelDecoder::InitAVCodecVideo(), AvFormatDecoder::InitVideoCodec(), mpeg1_decode_picture(), and mpeg_decode_slice().

int(* AVCodecContext::get_buffer)(struct AVCodecContext *c, AVFrame *pic)

Called at the beginning of each frame to get a buffer for it.

If pic.reference is set then the frame will be read later by libavcodec. avcodec_align_dimensions() should be used to find the required width and height, as they normally need to be rounded up to the next multiple of 16.

• encoding: unused
• decoding: Set by libavcodec., user can override.

Referenced by alloc_picture(), avcodec_default_reget_buffer(), avcodec_get_context_defaults2(), bmp_decode_frame(), common_init(), cyuv_decode_frame(), decode_frame(), decode_init(), decode_pic(), AvFormatDecoderPrivate::DecodeMPEG2Video(), dnxhd_decode_frame(), dvvideo_decode_frame(), encode_init(), ff_mjpeg_decode_sof(), flashsv_decode_frame(), frame_start(), gif_decode_frame(), idcin_decode_frame(), indeo3_decode_frame(), NuppelDecoder::InitAVCodecVideo(), AvFormatDecoder::InitVideoCodec(), ipvideo_decode_frame(), mm_decode_init(), pnm_decode_frame(), ptx_decode_frame(), roq_encode_frame(), sp5x_decode_frame(), svq1_encode_frame(), tiff_decode_tag(), txd_decode_frame(), ulti_decode_frame(), vmdvideo_decode_frame(), vp3_decode_frame(), vp56_decode_frame(), vqa_decode_frame(), and xan_decode_frame().

void(* AVCodecContext::release_buffer)(struct AVCodecContext *c, AVFrame *pic)

Called to release buffers which where allocated with get_buffer.

A released buffer can be reused in get_buffer(). pic.data[*] must be set to NULL.

• encoding: unused
• decoding: Set by libavcodec., user can override.

Referenced by aasc_decode_end(), alloc_picture(), avcodec_default_reget_buffer(), avcodec_get_context_defaults2(), bethsoftvid_decode_end(), bmp_decode_end(), bmp_decode_frame(), cavs_decode_frame(), cinepak_decode_end(), cinvideo_decode_end(), common_end(), cyuv_decode_frame(), decode_end(), decode_frame(), decode_pic(), AvFormatDecoderPrivate::DecodeMPEG2Video(), dnxhd_decode_close(), dnxhd_decode_frame(), dvvideo_close(), dvvideo_decode_frame(), encode_frame(), ff_mjpeg_decode_sof(), ff_mpeg_flush(), flashsv_decode_end(), flashsv_decode_frame(), flic_decode_end(), free_picture(), AvFormatDecoder::GetFrame(), gif_decode_close(), gif_decode_frame(), idcin_decode_end(), idcin_decode_frame(), indeo3_decode_frame(), NuppelDecoder::InitAVCodecVideo(), AvFormatDecoder::InitVideoCodec(), ipvideo_decode_end(), ipvideo_decode_frame(), ir2_decode_frame(), mm_decode_end(), MPV_frame_end(), MPV_frame_start(), msrle_decode_end(), msvideo1_decode_end(), pnm_decode_frame(), ptx_decode_frame(), ptx_end(), qtrle_decode_end(), roq_decode_end(), roq_encode_end(), rpza_decode_end(), select_input_picture(), seqvideo_decode_end(), sgi_end(), smc_decode_end(), targa_end(), tiff_decode_tag(), tiff_end(), truemotion1_decode_end(), txd_decode_frame(), txd_end(), ulti_decode_frame(), vmdvideo_decode_end(), vmdvideo_decode_frame(), vp3_decode_end(), vp3_decode_frame(), vp56_decode_frame(), vp56_free(), vqa_decode_end(), vqa_decode_frame(), xan_decode_end(), and xan_decode_frame().

int AVCodecContext::has_b_frames

If 1 the stream has a 1 frame delay during decoding.

• encoding: Set by libavcodec.
• decoding: Set by libavcodec.

Definition at line 1147 of file avcodec.h.

Referenced by MPEG2fixup::BuildFrame(), compute_pkt_fields(), compute_pkt_fields2(), decode_frame(), decode_nal_units(), decode_stream_header(), ff_h263_decode_frame(), mpeg_decode_postinit(), mpegvideo_extract_headers(), MPV_encode_init(), nut_read_header(), nut_write_header(), rv10_decode_init(), rv20_decode_picture_header(), svq1_decode_init(), svq3_decode_frame(), vc1_decode_init(), vcr2_init_sequence(), write_streamheader(), and X264_init().

int AVCodecContext::block_align

number of bytes per packet if constant and known or 0 Used by some WAV based audio codecs.

Definition at line 1153 of file avcodec.h.

Referenced by adpcm_decode_frame(), adpcm_encode_frame(), adpcm_encode_init(), aiff_read_header(), aiff_read_packet(), aiff_write_header(), aiff_write_trailer(), apc_read_header(), asf_write_header1(), atrac3_decode_frame(), atrac3_decode_init(), avi_read_header(), avi_write_packet(), avisynth_read_header(), cin_read_header(), cook_decode_frame(), cook_decode_init(), daud_header(), decode_wave_header(), dxa_read_header(), ea_read_header(), encode_init(), ff_parse_specific_params(), ff_rm_parse_packet(), ff_rm_retrieve_cache(), ff_wma_init(), film_read_header(), fourxm_read_header(), get_aiff_header(), get_sindex(), get_wav_header(), idcin_read_header(), imc_decode_frame(), ipmovie_read_header(), libgsm_decode_frame(), libgsm_encode_frame(), libgsm_init(), matroska_parse_block(), matroska_read_header(), mov_read_stsd(), pcm_encode_init(), pcm_read_seek(), put_wav_header(), ra288_decode_frame(), rm_read_audio_stream_info(), rm_read_packet(), roq_read_header(), seq_read_header(), str_read_header(), tta_decode_init(), vmd_read_header(), vmdaudio_decode_init(), wav_read_packet(), wc3_read_header(), wsaud_read_header(), and wsvqa_read_header().

int AVCodecContext::parse_only

Definition at line 1155 of file avcodec.h.

Referenced by decode_frame_adu(), and decode_init().

int AVCodecContext::mpeg_quant

0-> h263 quant 1-> mpeg quant

• encoding: Set by user.

• decoding: unused

Definition at line 1164 of file avcodec.h.

Referenced by ff_xvid_encode_init(), ffm_read_header(), ffm_write_header(), and MPV_encode_init().

char* AVCodecContext::stats_out

pass1 encoding statistics output buffer

• encoding: Set by libavcodec.

• decoding: unused

Definition at line 1171 of file avcodec.h.

Referenced by encode_end(), encode_frame(), encode_init(), ff_write_pass1_stats(), ff_xvid_encode_frame(), MPV_common_end(), and MPV_common_init().

char* AVCodecContext::stats_in

pass2 encoding statistics input buffer Concatenated stuff from stats_out of pass1 should be placed here.

• encoding: Allocated/set/freed by user.
• decoding: unused

Definition at line 1179 of file avcodec.h.

Referenced by encode_init(), ff_rate_control_init(), and ff_xvid_encode_init().

float AVCodecContext::rc_qsquish

ratecontrol qmin qmax limiting method 0-> clipping, 1-> use a nice continous function to limit qscale wthin qmin/qmax.

• encoding: Set by user.
• decoding: unused

Definition at line 1187 of file avcodec.h.

Referenced by modify_qscale().

float AVCodecContext::rc_qmod_amp

Definition at line 1189 of file avcodec.h.

Referenced by modify_qscale().

int AVCodecContext::rc_qmod_freq

Definition at line 1190 of file avcodec.h.

Referenced by modify_qscale().

RcOverride* AVCodecContext::rc_override

ratecontrol override, see RcOverride

• encoding: Allocated/set/freed by user.

• decoding: unused

Definition at line 1197 of file avcodec.h.

Referenced by get_qscale().

int AVCodecContext::rc_override_count

Definition at line 1198 of file avcodec.h.

Referenced by get_qscale(), and NuppelVideoRecorder::SetupAVCodecVideo().

char* AVCodecContext::rc_eq

rate control equation

• encoding: Set by user
• decoding: unused

Definition at line 1205 of file avcodec.h.

Referenced by avcodec_get_context_defaults2(), ff_rate_control_init(), ffm_read_header(), ffm_write_header(), get_qscale(), and X264_init().

int AVCodecContext::rc_max_rate

maximum bitrate

• encoding: Set by user.

• decoding: unused

Definition at line 1212 of file avcodec.h.

Referenced by ff_vbv_update(), ff_xvid_rate_control_init(), ffm_read_header(), ffm_write_header(), modify_qscale(), mov_write_esds_tag(), mpeg1_encode_sequence_header(), mpeg_mux_init(), MPV_encode_init(), MPV_encode_picture(), NuppelVideoRecorder::SetupAVCodecVideo(), and X264_init().

int AVCodecContext::rc_min_rate

minimum bitrate

• encoding: Set by user.

• decoding: unused

Definition at line 1219 of file avcodec.h.

Referenced by ff_vbv_update(), ffm_read_header(), ffm_write_header(), modify_qscale(), mov_write_esds_tag(), MPV_encode_init(), MPV_encode_picture(), and NuppelVideoRecorder::SetupAVCodecVideo().

int AVCodecContext::rc_buffer_size

decoder bitstream buffer size

• encoding: Set by user.

• decoding: unused

Definition at line 1226 of file avcodec.h.

Referenced by MPEG2fixup::BuildFrame(), ff_vbv_update(), ff_xvid_rate_control_init(), ffm_read_header(), ffm_write_header(), init_pass2(), load_input_picture(), modify_qscale(), mov_write_esds_tag(), mpeg1_decode_sequence(), mpeg1_encode_sequence_header(), mpeg_decode_sequence_extension(), mpeg_mux_init(), MPV_encode_init(), MPV_encode_picture(), select_input_picture(), NuppelVideoRecorder::SetupAVCodecVideo(), and X264_init().

float AVCodecContext::rc_buffer_aggressivity

Definition at line 1227 of file avcodec.h.

Referenced by MPEG2fixup::BuildFrame(), ffm_read_header(), ffm_write_header(), modify_qscale(), and NuppelVideoRecorder::SetupAVCodecVideo().

float AVCodecContext::i_quant_factor

qscale factor between P and I-frames If > 0 then the last p frame quantizer will be used (q= lastp_q*factor+offset).

If < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset).

• encoding: Set by user.
• decoding: unused

Definition at line 1236 of file avcodec.h.

Referenced by ffm_read_header(), ffm_write_header(), get_diff_limited_q(), get_qminmax(), get_qscale(), and X264_init().

float AVCodecContext::i_quant_offset

qscale offset between P and I-frames

• encoding: Set by user.

• decoding: unused

Definition at line 1243 of file avcodec.h.

Referenced by ffm_read_header(), ffm_write_header(), get_diff_limited_q(), get_qminmax(), and get_qscale().

float AVCodecContext::rc_initial_cplx

initial complexity for pass1 ratecontrol

• encoding: Set by user.

• decoding: unused

Definition at line 1250 of file avcodec.h.

Referenced by ff_rate_control_init(), and NuppelVideoRecorder::SetupAVCodecVideo().

int AVCodecContext::dct_algo

DCT algorithm, see FF_DCT_* below

• encoding: Set by user.

• decoding: unused

Definition at line 1257 of file avcodec.h.

Referenced by dsputil_init(), dsputil_init_mmx(), dsputil_init_ppc(), ffm_read_header(), ffm_write_header(), MPV_common_init_altivec(), MPV_common_init_mlib(), MPV_common_init_mmx(), and NuppelVideoRecorder::SetupAVCodecVideo().

float AVCodecContext::lumi_masking

luminance masking (0-> disabled)

• encoding: Set by user.

• decoding: unused

Definition at line 1271 of file avcodec.h.

Referenced by adaptive_quantization(), ff_xvid_encode_init(), and MPV_encode_init().

float AVCodecContext::temporal_cplx_masking

temporary complexity masking (0-> disabled)

• encoding: Set by user.

• decoding: unused

Definition at line 1278 of file avcodec.h.

Referenced by adaptive_quantization(), and MPV_encode_init().

float AVCodecContext::spatial_cplx_masking

spatial complexity masking (0-> disabled)

• encoding: Set by user.

• decoding: unused

Definition at line 1285 of file avcodec.h.

Referenced by adaptive_quantization(), and MPV_encode_init().

float AVCodecContext::p_masking

p block masking (0-> disabled)

• encoding: Set by user.

• decoding: unused

Definition at line 1292 of file avcodec.h.

Referenced by adaptive_quantization(), and MPV_encode_init().

float AVCodecContext::dark_masking

darkness masking (0-> disabled)

• encoding: Set by user.

• decoding: unused

Definition at line 1299 of file avcodec.h.

Referenced by adaptive_quantization(), and MPV_encode_init().

int AVCodecContext::unused

Definition at line 1303 of file avcodec.h.

int AVCodecContext::idct_algo

IDCT algorithm, see FF_IDCT_* below.

• encoding: Set by user.
• decoding: Set by user.

Definition at line 1310 of file avcodec.h.

Referenced by decode_pic(), dsputil_init(), dsputil_init_armv4l(), dsputil_init_bfin(), dsputil_init_mmi(), dsputil_init_mmx(), dsputil_init_ppc(), dsputil_init_sh4(), dsputil_init_vis(), ff_h263_decode_frame(), AvFormatDecoder::InitVideoCodec(), MPV_common_init_altivec(), MPV_common_init_mlib(), render_slice(), NuppelVideoRecorder::SetupAVCodecVideo(), vc1_decode_init(), vcr2_init_sequence(), vp3_decode_init(), vp56_init(), and wmv2_decode_init().

int AVCodecContext::slice_count

slice count

• encoding: Set by libavcodec.

• decoding: Set by user (or 0).

Definition at line 1337 of file avcodec.h.

Referenced by get_slice_offset(), and rv10_decode_frame().

int* AVCodecContext::slice_offset

slice offsets in the frame in bytes

• encoding: Set/allocated by libavcodec.

• decoding: Set/allocated by user (or NULL).

Definition at line 1343 of file avcodec.h.

Referenced by get_slice_offset().

int AVCodecContext::error_concealment

error concealment flags

• encoding: unused
• decoding: Set by user.

Definition at line 1350 of file avcodec.h.

Referenced by ff_er_frame_end(), guess_mv(), and AvFormatDecoder::InitVideoCodec().

unsigned AVCodecContext::dsp_mask

dsp_mask could be add used to disable unwanted CPU features CPU features (i.e.

MMX, SSE. ...)

With the FORCE flag you may instead enable given CPU features. (Dangerous: Usable in case of misdetection, improper usage however will result into program crash.)

Definition at line 1362 of file avcodec.h.

Referenced by MPEG2fixup::BuildFrame(), dsputil_init_iwmmxt(), dsputil_init_mmx(), and main().

int AVCodecContext::bits_per_sample

bits per sample/pixel from the demuxer (needed for huffyuv).

• encoding: Set by libavcodec.
• decoding: Set by user.

Definition at line 1380 of file avcodec.h.

Referenced by aiff_write_header(), alac_decode_init(), amf_parse_object(), apc_read_header(), ape_decode_init(), ape_read_header(), asf_read_header(), av_find_stream_info(), avi_read_header(), avisynth_read_header(), avs_read_packet(), cin_read_header(), cinepak_decode_init(), create_audio_stream(), daud_header(), decode_init(), decode_wave_header(), ea_read_header(), encode_init(), faac_decode_init(), film_read_header(), flip(), flv_read_packet(), flv_set_audio_codec(), fourxm_read_header(), get_aiff_header(), get_audio_flags(), get_codec_data(), get_sindex(), get_wav_header(), idcin_read_header(), NuppelDecoder::InitAVCodecVideo(), ipmovie_read_header(), mmf_read_header(), mov_read_stsd(), mpc8_read_header(), mpc_read_header(), msrle_decode_frame(), mtv_read_header(), mxf_get_d10_aes3_packet(), mxf_parse_structural_metadata(), nsv_parse_NSVs_header(), nuv_header(), put_bmp_header(), put_wav_header(), qtrle_decode_frame(), qtrle_decode_init(), qtrle_encode_init(), raw_decode(), raw_init_decoder(), roq_read_header(), seq_read_header(), smacker_read_header(), tta_decode_init(), tta_read_header(), vid_read_header(), vid_read_packet(), vmd_read_header(), vmdaudio_decode_init(), voc_get_packet(), voc_write_packet(), wc3_read_header(), wsaud_read_header(), wsvqa_read_header(), and wv_read_header().

int AVCodecContext::prediction_method

prediction method (needed for huffyuv)

• encoding: Set by user.

• decoding: unused

Definition at line 1387 of file avcodec.h.

Referenced by encode_init(), encode_picture_lossless(), encode_picture_ls(), ff_mjpeg_encode_picture_header(), and NuppelVideoRecorder::SetupAVCodecVideo().

AVRational AVCodecContext::sample_aspect_ratio

sample aspect ratio (0 if unknown) Numerator and denominator must be relatively prime and smaller than 256 for some video standards.

• encoding: Set by user.
• decoding: Set by libavcodec.

Definition at line 1398 of file avcodec.h.

Referenced by asf_read_header(), avcodec_get_context_defaults2(), avcodec_string(), decode_sequence_header_adv(), decode_slice_header(), decode_stream_header(), decode_vol_header(), dv_extract_video_info(), dv_write_pack(), encode_init(), getFileInfo(), h263_decode_picture_header(), h263_encode_picture_header(), AvFormatDecoder::H264PreProcessPkt(), AvFormatDecoder::InitVideoCodec(), jpeg_put_comments(), matroska_read_header(), mjpeg_decode_app(), mkv_write_tracks(), mov_write_tkhd_tag(), mpeg1_encode_sequence_header(), mpeg4_encode_vol_header(), mpeg_decode_postinit(), nut_read_header(), nuv_header(), read_header(), theora_header(), write_streamheader(), X264_init(), yuv4_generate_header(), and yuv4_read_header().

AVFrame* AVCodecContext::coded_frame

the picture in the bitstream

• encoding: Set by libavcodec.

• decoding: Set by libavcodec.

Definition at line 1405 of file avcodec.h.

Referenced by AC3_encode_close(), AC3_encode_init(), adpcm_encode_close(), adpcm_encode_init(), adx_encode_close(), adx_encode_init(), amr_nb_encode_close(), amr_nb_encode_init(), amr_wb_encode_close(), amr_wb_encode_init(), bmp_decode_init(), bmp_encode_init(), common_init(), decode_frame(), decode_init(), dnxhd_decode_init(), dnxhd_encode_init(), dvvideo_init(), encode_init(), encode_init_ls(), Faac_encode_close(), Faac_encode_init(), ff_xvid_encode_init(), flac_encode_close(), flac_encode_init(), flashsv_encode_frame(), g726_close(), g726_init(), gif_decode_init(), gif_encode_init(), libgsm_init(), mdec_common_init(), MP3lame_encode_close(), MP3lame_encode_init(), MPA_encode_close(), MPA_encode_init(), MPV_common_init(), MPV_frame_end(), oggvorbis_encode_close(), oggvorbis_encode_frame(), oggvorbis_encode_init(), pcm_encode_close(), pcm_encode_init(), png_dec_init(), png_enc_init(), ptx_init(), qtrle_encode_init(), raw_decode(), raw_init_decoder(), raw_init_encoder(), roq_dpcm_encode_close(), roq_dpcm_encode_init(), sgi_init(), sonic_encode_close(), sonic_encode_init(), svq1_encode_init(), targa_init(), tiff_init(), txd_init(), ulti_decode_init(), v4l2_read_packet(), vorbis_encode_close(), vorbis_encode_init(), X264_init(), yuv4_generate_header(), and yuv4_read_packet().

int AVCodecContext::debug

debug

• encoding: Set by user.

• decoding: Set by user.

Definition at line 1412 of file avcodec.h.

Referenced by alloc_picture(), av_read_frame_internal(), decode_ext_header(), decode_frame(), decode_init(), decode_nal_units(), decode_picture_parameter_set(), decode_seq_parameter_set(), decode_slice_header(), decode_unregistered_user_data(), decode_vol_header(), decode_vop_header(), execute_ref_pic_marking(), ff_er_frame_end(), ff_h263_decode_frame(), ff_mjpeg_decode_sos(), ff_mpeg4_decode_picture_header(), ff_print_debug_info(), ff_rate_estimate_qscale(), ff_vbv_update(), ff_wmv2_decode_secondary_picture_header(), ffm_read_header(), ffm_write_header(), find_short(), flv_h263_decode_picture_header(), h263_decode_picture_header(), AvFormatDecoder::InitVideoCodec(), intel_h263_decode_picture_header(), mjpeg_decode_app(), mjpeg_decode_com(), mjpegb_decode_frame(), modify_qscale(), mpeg1_decode_picture(), mpeg1_decode_sequence(), mpeg_decode_frame(), mpeg_decode_gop(), mpeg_decode_picture_display_extension(), mpeg_decode_sequence_display_extension(), mpeg_decode_sequence_extension(), mpeg_decode_slice(), MPV_common_init(), MPV_decode_mb_internal(), msmpeg4_decode_picture_header(), predict_slice(), predict_slice_buffered(), print_long_term(), print_short_term(), remove_short(), rv10_decode_init(), rv20_decode_picture_header(), svq3_decode_frame(), and vp3_decode_frame().

int AVCodecContext::debug_mv

debug

• encoding: Set by user.

• decoding: Set by user.

Definition at line 1434 of file avcodec.h.

Referenced by alloc_picture(), ff_print_debug_info(), and MPV_common_init().

uint64_t AVCodecContext::error[4]

error

• encoding: Set by libavcodec if flags&CODEC_FLAG_PSNR.

• decoding: unused

Definition at line 1444 of file avcodec.h.

Referenced by encode_frame(), estimate_best_b_count(), and MPV_encode_picture().

int AVCodecContext::mb_qmin

minimum MB quantizer

• encoding: unused
• decoding: unused

Definition at line 1451 of file avcodec.h.

Referenced by NuppelVideoRecorder::SetupAVCodecVideo().

int AVCodecContext::mb_qmax

maximum MB quantizer

• encoding: unused
• decoding: unused

Definition at line 1458 of file avcodec.h.

Referenced by NuppelVideoRecorder::SetupAVCodecVideo().

int AVCodecContext::me_cmp

motion estimation comparison function

• encoding: Set by user.

• decoding: unused

Definition at line 1465 of file avcodec.h.

Referenced by encode_init(), encode_q_branch(), estimate_best_b_count(), ff_estimate_motion_b(), ff_estimate_p_frame_motion(), ff_init_me(), get_4block_rd(), get_block_rd(), hpel_motion_search(), qpel_motion_search(), and X264_init().

int AVCodecContext::me_sub_cmp

subpixel motion estimation comparison function

• encoding: Set by user.

• decoding: unused

Definition at line 1471 of file avcodec.h.

Referenced by direct_search(), encode_init(), encode_q_branch(), estimate_best_b_count(), ff_estimate_motion_b(), ff_estimate_p_frame_motion(), ff_init_me(), hpel_motion_search(), and qpel_motion_search().

int AVCodecContext::mb_cmp

macroblock comparison function (not supported yet)

• encoding: Set by user.

• decoding: unused

Definition at line 1477 of file avcodec.h.

Referenced by check_bidir_mv(), direct_search(), encode_q_branch(), estimate_best_b_count(), ff_estimate_motion_b(), ff_estimate_p_frame_motion(), ff_init_me(), h263_mv4_search(), interlaced_search(), and sse_mb().

int AVCodecContext::ildct_cmp

interlaced DCT comparison function

• encoding: Set by user.

• decoding: unused

Definition at line 1483 of file avcodec.h.

Referenced by encode_mb_internal(), and MPV_encode_init().

int AVCodecContext::dia_size

ME diamond size & shape

• encoding: Set by user.

• decoding: unused

Definition at line 1506 of file avcodec.h.

Referenced by estimate_motion_thread(), ff_init_me(), iterative_me(), and svq1_encode_plane().

int AVCodecContext::last_predictor_count

amount of previous MV predictors (2a+1 x 2a+1 square)

• encoding: Set by user.

• decoding: unused

Definition at line 1513 of file avcodec.h.

Referenced by epzs_motion_search_internal().

int AVCodecContext::pre_me

prepass for motion estimation

• encoding: Set by user.

• decoding: unused

Definition at line 1520 of file avcodec.h.

Referenced by encode_picture().

int AVCodecContext::me_pre_cmp

motion estimation prepass comparison function

• encoding: Set by user.

• decoding: unused

Definition at line 1527 of file avcodec.h.

Referenced by ff_init_me(), and ff_pre_estimate_p_frame_motion().

int AVCodecContext::pre_dia_size

ME prepass diamond size & shape

• encoding: Set by user.

• decoding: unused

Definition at line 1534 of file avcodec.h.

Referenced by ff_init_me(), and pre_estimate_motion_thread().

int AVCodecContext::me_subpel_quality

subpel ME quality

• encoding: Set by user.

• decoding: unused

Definition at line 1541 of file avcodec.h.

Referenced by qpel_motion_search(), and X264_init().

enum PixelFormat(* AVCodecContext::get_format)(struct AVCodecContext *s, const enum PixelFormat *fmt)

callback to negotiate the pixelFormat

Parameters:

fmt

is the list of formats which are supported by the codec, it is terminated by -1 as 0 is a valid format, the formats are ordered by quality. The first is always the native one.

Returns:

the chosen format

• encoding: unused
• decoding: Set by user, if not set the native format will be chosen.

Referenced by avcodec_get_context_defaults2(), decode_init(), and vcr2_init_sequence().

int AVCodecContext::dtg_active_format

DTG active format information (additional aspect ratio information only used in DVB MPEG-2 transport streams) 0 if not set.

• encoding: unused
• decoding: Set by decoder.

Definition at line 1562 of file avcodec.h.

Referenced by mpeg_decode_user_data().

int AVCodecContext::me_range

maximum motion estimation search range in subpel units If 0 then no limit.

• encoding: Set by user.
• decoding: unused

Definition at line 1578 of file avcodec.h.

Referenced by encode_init(), ff_fix_long_mvs(), ff_fix_long_p_mvs(), ff_get_best_fcode(), get_limits(), mpeg1_encode_sequence_header(), and X264_init().

int AVCodecContext::intra_quant_bias

intra quantizer bias

• encoding: Set by user.

• decoding: unused

Definition at line 1585 of file avcodec.h.

Referenced by dnxhd_encode_init(), and MPV_encode_init().

int AVCodecContext::inter_quant_bias

inter quantizer bias

• encoding: Set by user.

• decoding: unused

Definition at line 1593 of file avcodec.h.

Referenced by MPV_encode_init().

int AVCodecContext::color_table_id

color table ID

• encoding: unused
• decoding: Which clrtable should be used for 8bit RGB images.

Tables have to be stored somewhere. FIXME

Definition at line 1601 of file avcodec.h.

Referenced by mov_read_stsd().

int AVCodecContext::internal_buffer_count

internal_buffer count Don't touch, used by libavcodec default_get_buffer().

Definition at line 1607 of file avcodec.h.

Referenced by avcodec_default_free_buffers(), avcodec_default_get_buffer(), and avcodec_default_release_buffer().

void* AVCodecContext::internal_buffer

internal_buffers Don't touch, used by libavcodec default_get_buffer().

Definition at line 1613 of file avcodec.h.

Referenced by avcodec_default_free_buffers(), avcodec_default_get_buffer(), and avcodec_default_release_buffer().

int AVCodecContext::global_quality

Global quality for codecs which cannot change it per frame.

This should be proportional to MPEG-1/2/4 qscale.

• encoding: Set by user.
• decoding: unused

Definition at line 1627 of file avcodec.h.

Referenced by encode_init(), Faac_encode_init(), MP3lame_encode_init(), oggvorbis_init_encoder(), and vorbis_encode_init().

int AVCodecContext::coder_type

coder type

• encoding: Set by user.

• decoding: unused

Definition at line 1639 of file avcodec.h.

Referenced by encode_init(), read_header(), write_header(), and X264_init().

int AVCodecContext::context_model

context model

• encoding: Set by user.

• decoding: unused

Definition at line 1646 of file avcodec.h.

Referenced by encode_init(), encode_plane(), and encode_rgb_frame().

uint8_t*(* AVCodecContext::realloc)(struct AVCodecContext *s, uint8_t *buf, int buf_size)

• encoding: unused
  • decoding: Set by user.

int AVCodecContext::slice_flags

slice flags

• encoding: unused
• decoding: Set by user.

Definition at line 1661 of file avcodec.h.

Referenced by ff_draw_horiz_band(), AvFormatDecoder::InitVideoCodec(), mpeg_mc_decode_init(), and mpeg_xvmc_vld_decode_init().

int AVCodecContext::xvmc_acceleration

XVideo Motion Acceleration

• encoding: forbidden
• decoding: set by decoder.

Definition at line 1671 of file avcodec.h.

Referenced by ff_er_frame_end(), handle_intra_block(), handle_p_b_block(), is_intra_more_likely(), mpeg_decode_init(), mpeg_decode_mb(), mpeg_decode_slice(), mpeg_field_start(), mpeg_mc_decode_init(), MPV_decode_mb_internal(), MPV_frame_end(), slice_end(), and vcr2_init_sequence().

int AVCodecContext::mb_decision

macroblock decision mode

• encoding: Set by user.

• decoding: unused

Definition at line 1678 of file avcodec.h.

Referenced by avcodec_string(), clip_coeffs(), dnxhd_calc_bits_thread(), dnxhd_encode_picture(), dnxhd_init_rc(), encode_mb_hq(), encode_thread(), estimate_best_b_count(), ff_estimate_b_frame_motion(), ff_estimate_p_frame_motion(), ff_xvid_encode_init(), ffm_read_header(), ffm_write_header(), MPV_decode_mb_internal(), MPV_encode_init(), and NuppelVideoRecorder::SetupAVCodecVideo().

uint16_t* AVCodecContext::intra_matrix

custom intra quantization matrix

• encoding: Set by user, can be NULL.

• decoding: Set by libavcodec.

Definition at line 1688 of file avcodec.h.

Referenced by MPEG2fixup::BuildFrame(), ff_xvid_encode_init(), mpeg1_encode_sequence_header(), mpeg4_encode_vol_header(), and MPV_encode_init().

uint16_t* AVCodecContext::inter_matrix

custom inter quantization matrix

• encoding: Set by user, can be NULL.

• decoding: Set by libavcodec.

Definition at line 1695 of file avcodec.h.

Referenced by ff_xvid_encode_init(), mpeg1_encode_sequence_header(), mpeg4_encode_vol_header(), and MPV_encode_init().

unsigned int AVCodecContext::stream_codec_tag

fourcc from the AVI stream header (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').

This is used to work around some encoder bugs.

• encoding: unused
• decoding: Set by user, will be converted to uppercase by libavcodec during init.

Definition at line 1703 of file avcodec.h.

Referenced by avi_read_header(), avisynth_read_header(), and MPV_common_init().

int AVCodecContext::scenechange_threshold

scene change detection threshold 0 is default, larger means fewer detected scene changes.

• encoding: Set by user.
• decoding: unused

Definition at line 1711 of file avcodec.h.

Referenced by encode_frame(), encode_picture(), MPV_encode_init(), and X264_init().

int AVCodecContext::lmin

minimum Lagrange multipler

• encoding: Set by user.

• decoding: unused

Definition at line 1718 of file avcodec.h.

Referenced by get_qminmax().

int AVCodecContext::lmax

maximum Lagrange multipler

• encoding: Set by user.

• decoding: unused

Definition at line 1725 of file avcodec.h.

Referenced by get_qminmax(), and MPV_encode_picture().

struct AVPaletteControl* AVCodecContext::palctrl [read]

palette control structure

• encoding: ??? (no palette-enabled encoder yet)
• decoding: Set by user.

Definition at line 1732 of file avcodec.h.

Referenced by asf_read_close(), asf_read_header(), avcodec_get_context_defaults2(), avi_read_close(), avi_read_header(), avi_read_packet(), cinepak_decode_frame(), cinepak_decode_init(), decode_frame(), decode_init(), idcin_decode_frame(), idcin_read_header(), ipmovie_read_header(), ipvideo_decode_frame(), ipvideo_decode_init(), ipvideo_decode_opcodes(), mm_decode_frame(), mm_decode_init(), mm_read_header(), mov_read_stsd(), msrle_decode_pal4(), msrle_decode_pal8(), msvideo1_decode_8bit(), msvideo1_decode_init(), nsv_read_close(), qtrle_decode_frame(), raw_decode(), smc_decode_stream(), wc3_read_header(), xan_decode_frame(), and xan_decode_init().

int AVCodecContext::noise_reduction

noise reduction strength

• encoding: Set by user.

• decoding: unused

Definition at line 1739 of file avcodec.h.

Referenced by init_duplicate_context(), merge_context_after_encode(), MPV_common_init(), update_noise_reduction(), and X264_init().

int(* AVCodecContext::reget_buffer)(struct AVCodecContext *c, AVFrame *pic)

Called at the beginning of a frame to get cr buffer for it.

Buffer type (size, hints) must be the same. libavcodec won't check it. libavcodec will pass previous buffer in pic, function should return same buffer or new buffer with old frame "painted" into it. If pic.data[0] == NULL must behave like get_buffer().

• encoding: unused
• decoding: Set by libavcodec., user can override

Referenced by aasc_decode_frame(), avcodec_get_context_defaults2(), avs_decode_frame(), bethsoftvid_decode_frame(), cinepak_decode_frame(), cinvideo_decode_frame(), decode_frame(), flic_decode_frame_15_16BPP(), flic_decode_frame_8BPP(), ir2_decode_frame(), msrle_decode_frame(), msvideo1_decode_frame(), qtrle_decode_frame(), roq_decode_frame(), rpza_decode_frame(), seqvideo_decode_frame(), smc_decode_frame(), and truemotion1_decode_frame().

int AVCodecContext::rc_initial_buffer_occupancy

Number of bits which should be loaded into the rc buffer before decoding starts.

• encoding: Set by user.
• decoding: unused

Definition at line 1757 of file avcodec.h.

Referenced by ff_rate_control_init(), ff_xvid_rate_control_init(), and X264_init().

int AVCodecContext::inter_threshold

• encoding: Set by user.

• decoding: unused

Definition at line 1764 of file avcodec.h.

int AVCodecContext::flags2

CODEC_FLAG2_*

• encoding: Set by user.

• decoding: Set by user.

Definition at line 1771 of file avcodec.h.

Referenced by av_parser_change(), decode_frame(), decode_slice_header(), dump_extradata(), encode_422_bitstream(), encode_bgr_bitstream(), encode_frame(), encode_gray_bitstream(), encode_init(), ff_h263_decode_frame(), ffm_read_header(), ffm_write_header(), h261_decode_frame(), mpeg1_encode_sequence_header(), mpeg_decode_init(), MPV_common_init(), MPV_encode_init(), remove_extradata(), svq3_decode_frame(), and X264_init().

int AVCodecContext::error_rate

Simulates errors in the bitstream to test error concealment.

• encoding: Set by user.
• decoding: unused

Definition at line 1778 of file avcodec.h.

Referenced by encode_thread(), and AvFormatDecoder::InitVideoCodec().

int AVCodecContext::antialias_algo

MP3 antialias algorithm, see FF_AA_* below.

• encoding: unused
• decoding: Set by user.

Definition at line 1785 of file avcodec.h.

Referenced by decode_init().

int AVCodecContext::quantizer_noise_shaping

quantizer noise shaping

• encoding: Set by user.

• decoding: unused

Definition at line 1795 of file avcodec.h.

Referenced by dct_quantize_refine(), and encode_mb_internal().

int AVCodecContext::thread_count

thread count is used to decide how many independent tasks should be passed to execute()

• encoding: Set by user.

• decoding: Set by user.

Definition at line 1803 of file avcodec.h.

Referenced by avcodec_thread_execute(), avcodec_thread_free(), avcodec_thread_init(), decode_nal_units(), decode_slice_header(), dnxhd_encode_end(), dnxhd_encode_init(), dnxhd_encode_picture(), dnxhd_encode_rdo(), dnxhd_encode_variance(), dnxhd_find_qscale(), dnxhd_load_picture(), dnxhd_setup_threads_slices(), encode_picture(), ff_er_add_slice(), frame_start(), free_tables(), mpeg_decode_frame(), mpeg_dvdv_decode_init(), mpeg_mc_decode_init(), mpeg_xvmc_vld_decode_init(), MPV_common_end(), MPV_common_init(), MPV_encode_init(), MPV_encode_picture(), AvFormatDecoder::ScanStreams(), worker(), and X264_init().

int(* AVCodecContext::execute)(struct AVCodecContext *c, int(*func)(struct AVCodecContext *c2, void *arg), void **arg2, int *ret, int count)

The codec may call this to execute several independent things.

It will return only after finishing all tasks. The user may replace this with some multithreaded implementation, the default implementation will execute the parts serially.

Parameters:

count

the number of things to execute encoding: Set by libavcodec, user can override. decoding: Set by libavcodec, user can override.

Referenced by avcodec_get_context_defaults2(), avcodec_thread_init(), dnxhd_encode_picture(), dnxhd_encode_rdo(), dnxhd_encode_variance(), dnxhd_find_qscale(), dvvideo_decode_frame(), dvvideo_encode_frame(), encode_picture(), execute_decode_slices(), and mpeg_decode_frame().

void* AVCodecContext::thread_opaque

thread opaque Can be used by execute() to store some per AVCodecContext stuff.

• encoding: set by execute()
• decoding: set by execute()

Definition at line 1822 of file avcodec.h.

Referenced by avcodec_close(), avcodec_thread_execute(), avcodec_thread_free(), avcodec_thread_init(), and worker().

int AVCodecContext::me_threshold

Motion estimation threshold below which no motion estimation is performed, but instead the user specified motion vectors are used.

• encoding: Set by user.
• decoding: unused

Definition at line 1831 of file avcodec.h.

Referenced by copy_picture_attributes(), encode_picture(), ff_estimate_b_frame_motion(), ff_estimate_p_frame_motion(), and MPV_encode_init().

int AVCodecContext::mb_threshold

Macroblock threshold below which the user specified macroblock types will be used.

• encoding: Set by user.
• decoding: unused

Definition at line 1838 of file avcodec.h.

Referenced by ff_estimate_b_frame_motion(), ff_estimate_p_frame_motion(), and MPV_encode_init().

int AVCodecContext::intra_dc_precision

precision of the intra DC coefficient - 8

• encoding: Set by user.

• decoding: unused

Definition at line 1845 of file avcodec.h.

Referenced by ffm_read_header(), ffm_write_header(), and MPV_encode_init().

int AVCodecContext::nsse_weight

noise vs.

sse weight for the nsse comparsion function

• encoding: Set by user.
• decoding: unused

Definition at line 1852 of file avcodec.h.

Referenced by ffm_read_header(), ffm_write_header(), nsse16_c(), nsse16_mmx(), nsse8_c(), and nsse8_mmx().

int AVCodecContext::skip_top

Number of macroblock rows at the top which are skipped.

• encoding: unused
• decoding: Set by user.

Definition at line 1859 of file avcodec.h.

Referenced by ff_er_add_slice(), and ff_er_frame_end().

int AVCodecContext::skip_bottom

Number of macroblock rows at the bottom which are skipped.

• encoding: unused
• decoding: Set by user.

Definition at line 1866 of file avcodec.h.

Referenced by ff_er_frame_end(), and mpeg_decode_frame().

int AVCodecContext::profile

profile

• encoding: Set by user.

• decoding: Set by libavcodec.

Definition at line 1873 of file avcodec.h.

Referenced by encode_init(), Faac_encode_init(), mpeg1_encode_sequence_header(), mpeg4_encode_visual_object_header(), mpeg_decode_sequence_extension(), and mpeg_decode_slice().

int AVCodecContext::level

level

• encoding: Set by user.

• decoding: Set by libavcodec.

Definition at line 1885 of file avcodec.h.

Referenced by encode_init(), mpeg1_encode_sequence_header(), mpeg4_encode_visual_object_header(), mpeg_decode_sequence_extension(), mpeg_decode_slice(), and X264_init().

int AVCodecContext::lowres

low resolution decoding, 1-> 1/2 size, 2->1/4 size

• encoding: unused
• decoding: Set by user.

Definition at line 1893 of file avcodec.h.

Referenced by avcodec_set_dimensions(), chroma_4mv_motion_lowres(), decode_slice(), dsputil_init(), dsputil_init_mmx(), dsputil_init_ppc(), dv_decode_video_segment(), dvvideo_init(), ff_init_block_index(), ff_update_block_index(), hpel_motion_lowres(), mjpeg_decode_scan(), mpeg_decode_slice(), mpeg_motion_lowres(), MPV_common_init_altivec(), MPV_decode_mb(), MPV_decode_mb_internal(), and MPV_motion_lowres().

int AVCodecContext::coded_width

Bitstream width / height, may be different from width/height if lowres or other things are used.

• encoding: unused
• decoding: Set by user before init if known. Codec should override / dynamically change if needed.

Definition at line 1901 of file avcodec.h.

Referenced by avcodec_decode_video(), avcodec_open(), avcodec_set_dimensions(), decode_entry_point(), decode_sequence_header_adv(), ff_h263_decode_frame(), ff_h263_decode_init(), h261_decode_frame(), h261_decode_init(), mdec_common_init(), mpeg_decode_postinit(), sp5x_decode_frame(), vc1_decode_init(), vc1_interp_mc(), vc1_mc_1mv(), vc1_mc_4mv_chroma(), vc1_mc_4mv_luma(), vcr2_init_sequence(), vp56_size_changed(), vp5_parse_header(), and vp6_parse_header().

int AVCodecContext::coded_height

Definition at line 1901 of file avcodec.h.

Referenced by avcodec_decode_video(), avcodec_open(), avcodec_set_dimensions(), decode_entry_point(), decode_sequence_header_adv(), ff_h263_decode_frame(), ff_h263_decode_init(), ff_mjpeg_decode_init(), h261_decode_frame(), h261_decode_init(), mdec_common_init(), mpeg_decode_postinit(), sp5x_decode_frame(), vc1_decode_init(), vc1_interp_mc(), vc1_mc_1mv(), vc1_mc_4mv_chroma(), vc1_mc_4mv_luma(), vcr2_init_sequence(), vp56_size_changed(), vp5_parse_header(), and vp6_parse_header().

int AVCodecContext::frame_skip_threshold

frame skip threshold

• encoding: Set by user.

• decoding: unused

Definition at line 1908 of file avcodec.h.

Referenced by select_input_picture(), and skip_check().

int AVCodecContext::frame_skip_factor

frame skip factor

• encoding: Set by user.

• decoding: unused

Definition at line 1915 of file avcodec.h.

Referenced by select_input_picture(), and skip_check().

int AVCodecContext::frame_skip_exp

frame skip exponent

• encoding: Set by user.

• decoding: unused

Definition at line 1922 of file avcodec.h.

Referenced by skip_check().

int AVCodecContext::frame_skip_cmp

frame skip comparison function

• encoding: Set by user.

• decoding: unused

Definition at line 1929 of file avcodec.h.

Referenced by ffm_read_header(), ffm_write_header(), and MPV_encode_init().

float AVCodecContext::border_masking

Border processing masking, raises the quantizer for mbs on the borders of the picture.

• encoding: Set by user.
• decoding: unused

Definition at line 1937 of file avcodec.h.

Referenced by adaptive_quantization(), and MPV_encode_init().

int AVCodecContext::mb_lmin

minimum MB lagrange multipler

• encoding: Set by user.

• decoding: unused

Definition at line 1944 of file avcodec.h.

Referenced by adaptive_quantization().

int AVCodecContext::mb_lmax

maximum MB lagrange multipler

• encoding: Set by user.

• decoding: unused

Definition at line 1951 of file avcodec.h.

Referenced by adaptive_quantization().

int AVCodecContext::me_penalty_compensation

• encoding: Set by user.

• decoding: unused

Definition at line 1958 of file avcodec.h.

Referenced by encode_picture().

enum AVDiscard AVCodecContext::skip_loop_filter

• encoding: unused
  • decoding: Set by user.

Definition at line 1965 of file avcodec.h.

Referenced by decode_slice_header(), and vp56_mc().

enum AVDiscard AVCodecContext::skip_idct

• encoding: unused
  • decoding: Set by user.

Definition at line 1972 of file avcodec.h.

Referenced by MPV_decode_mb_internal().

enum AVDiscard AVCodecContext::skip_frame

• encoding: unused
  • decoding: Set by user.

Definition at line 1979 of file avcodec.h.

Referenced by decode_frame(), decode_nal_units(), ff_h263_decode_frame(), h261_decode_frame(), mpeg_decode_frame(), svq1_decode_frame(), svq3_decode_frame(), and vc1_decode_frame().

int AVCodecContext::bidir_refine

• encoding: Set by user.

• decoding: unused

Definition at line 1986 of file avcodec.h.

Referenced by bidir_refine(), and X264_init().

int AVCodecContext::brd_scale

• encoding: Set by user.

• decoding: unused

Definition at line 1993 of file avcodec.h.

Referenced by estimate_best_b_count().

float AVCodecContext::crf

constant rate factor - quality-based VBR - values ~correspond to qps

• encoding: Set by user.

• decoding: unused

Definition at line 2000 of file avcodec.h.

Referenced by X264_init().

int AVCodecContext::cqp

constant quantization parameter rate control method

• encoding: Set by user.

• decoding: unused

Definition at line 2007 of file avcodec.h.

Referenced by X264_init().

int AVCodecContext::keyint_min

minimum GOP size

• encoding: Set by user.

• decoding: unused

Definition at line 2014 of file avcodec.h.

Referenced by encode_init(), and X264_init().

int AVCodecContext::refs

number of reference frames

• encoding: Set by user.

• decoding: unused

Definition at line 2021 of file avcodec.h.

Referenced by encode_init(), and X264_init().

int AVCodecContext::chromaoffset

chroma qp offset from luma

• encoding: Set by user.

• decoding: unused

Definition at line 2028 of file avcodec.h.

Referenced by X264_init().

int AVCodecContext::bframebias

Influences how often B-frames are used.

• encoding: Set by user.
• decoding: unused

Definition at line 2035 of file avcodec.h.

Referenced by X264_init().

int AVCodecContext::trellis

trellis RD quantization

• encoding: Set by user.

• decoding: unused

Definition at line 2042 of file avcodec.h.

Referenced by adpcm_compress_trellis(), adpcm_encode_frame(), and X264_init().

float AVCodecContext::complexityblur

Reduce fluctuations in qp (before curve compression).

• encoding: Set by user.
• decoding: unused

Definition at line 2049 of file avcodec.h.

Referenced by X264_init().

int AVCodecContext::deblockalpha

in-loop deblocking filter alphac0 parameter alpha is in the range -6.

..6

• encoding: Set by user.
• decoding: unused

Definition at line 2057 of file avcodec.h.

Referenced by X264_init().

int AVCodecContext::deblockbeta

in-loop deblocking filter beta parameter beta is in the range -6.

..6

• encoding: Set by user.
• decoding: unused

Definition at line 2065 of file avcodec.h.

Referenced by X264_init().

int AVCodecContext::partitions

macroblock subpartition sizes to consider - p8x8, p4x4, b8x8, i8x8, i4x4

• encoding: Set by user.

• decoding: unused

Definition at line 2072 of file avcodec.h.

Referenced by X264_init().

int AVCodecContext::directpred

direct MV prediction mode - 0 (none), 1 (spatial), 2 (temporal)

• encoding: Set by user.

• decoding: unused

Definition at line 2084 of file avcodec.h.

Referenced by X264_init().

int AVCodecContext::cutoff

Audio cutoff bandwidth (0 means "automatic"), currently used only by FAAC.

• encoding: Set by user.
• decoding: unused

Definition at line 2091 of file avcodec.h.

Referenced by Faac_encode_init(), and oggvorbis_init_encoder().

int AVCodecContext::scenechange_factor

Multiplied by qscale for each frame and added to scene_change_score.

• encoding: Set by user.
• decoding: unused

Definition at line 2098 of file avcodec.h.

int AVCodecContext::mv0_threshold

Note: Value depends upon the compare function used for fullpel ME.

• encoding: Set by user.
• decoding: unused

Definition at line 2106 of file avcodec.h.

Referenced by epzs_motion_search_internal().

int AVCodecContext::b_sensitivity

Adjusts sensitivity of b_frame_strategy 1.

• encoding: Set by user.
• decoding: unused

Definition at line 2113 of file avcodec.h.

Referenced by select_input_picture().

int AVCodecContext::compression_level

• encoding: Set by user.

• decoding: unused

Definition at line 2119 of file avcodec.h.

Referenced by encode_frame(), encode_init(), and flac_encode_init().

int AVCodecContext::use_lpc

Sets whether to use LPC mode - used by FLAC encoder.

• encoding: Set by user.
• decoding: unused

Definition at line 2127 of file avcodec.h.

Referenced by flac_encode_init().

int AVCodecContext::lpc_coeff_precision

LPC coefficient precision - used by FLAC encoder

• encoding: Set by user.

• decoding: unused

Definition at line 2134 of file avcodec.h.

Referenced by flac_encode_init().

int AVCodecContext::min_prediction_order

• encoding: Set by user.

• decoding: unused

Definition at line 2140 of file avcodec.h.

Referenced by flac_encode_init().

int AVCodecContext::max_prediction_order

• encoding: Set by user.

• decoding: unused

Definition at line 2146 of file avcodec.h.

Referenced by flac_encode_init().

int AVCodecContext::prediction_order_method

search method for selecting prediction order

• encoding: Set by user.

• decoding: unused

Definition at line 2153 of file avcodec.h.

Referenced by flac_encode_init().

int AVCodecContext::min_partition_order

• encoding: Set by user.

• decoding: unused

Definition at line 2159 of file avcodec.h.

Referenced by flac_encode_init().

int AVCodecContext::max_partition_order

• encoding: Set by user.

• decoding: unused

Definition at line 2165 of file avcodec.h.

Referenced by flac_encode_init().

int64_t AVCodecContext::timecode_frame_start

GOP timecode frame start number, in non drop frame format

• encoding: Set by user.

• decoding: unused

Definition at line 2172 of file avcodec.h.

Referenced by mpeg1_encode_sequence_header().

int AVCodecContext::request_channels

Decoder should decode to this many channels if it can (0 for default)

• encoding: unused
• decoding: Set by user.

Definition at line 2179 of file avcodec.h.

Referenced by a52_decode_frame(), ac3_decode_frame(), dca_decode_frame(), and AvFormatDecoder::GetFrame().

int AVCodecContext::xvmc_vld_hwslice

XVMC_VLD (VIA CLE266) Hardware MPEG decoding

• encoding: forbidden
• decoding: set by decoder.

Definition at line 2185 of file avcodec.h.

Referenced by mpeg_decode_init(), mpeg_decode_slice(), mpeg_field_start(), mpeg_xvmc_vld_decode_init(), slice_end(), and vcr2_init_sequence().

void(* AVCodecContext::decode_cc_dvd)(struct AVCodecContext *c, const uint8_t *buf, int buf_size)

Closed Caption decoder

• encoding: forbidden
• decoding: set by decoder.

Referenced by avcodec_get_context_defaults2(), mpeg_decode_user_data(), and AvFormatDecoder::ScanStreams().

void* AVCodecContext::dvdv

DVD Video (Mac OS X Hardware MPEG) decoding (originally by John Dagliesh http://www.defyne.org/dvb/accellent.html)

• encoding: forbidden
• decoding: set by decoder.

Definition at line 2201 of file avcodec.h.

Referenced by mpeg2_decode_block_intra(), mpeg2_decode_block_non_intra(), mpeg2_fast_decode_block_intra(), mpeg2_fast_decode_block_non_intra(), mpeg_decode_mb(), mpeg_decode_picture_coding_extension(), mpeg_decode_slice(), and mpeg_dvdv_decode_init().

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The documentation for this struct was generated from the following file:

• avcodec.h