yading@10: @chapter Codec Options
yading@10: @c man begin CODEC OPTIONS
yading@10: 
yading@10: libavcodec provides some generic global options, which can be set on
yading@10: all the encoders and decoders. In addition each codec may support
yading@10: so-called private options, which are specific for a given codec.
yading@10: 
yading@10: Sometimes, a global option may only affect a specific kind of codec,
yading@10: and may be unsensical or ignored by another, so you need to be aware
yading@10: of the meaning of the specified options. Also some options are
yading@10: meant only for decoding or encoding.
yading@10: 
yading@10: Options may be set by specifying -@var{option} @var{value} in the
yading@10: FFmpeg tools, or by setting the value explicitly in the
yading@10: @code{AVCodecContext} options or using the @file{libavutil/opt.h} API
yading@10: for programmatic use.
yading@10: 
yading@10: The list of supported options follow:
yading@10: 
yading@10: @table @option
yading@10: @item b @var{integer} (@emph{encoding,audio,video})
yading@10: Set bitrate in bits/s. Default value is 200K.
yading@10: 
yading@10: @item ab @var{integer} (@emph{encoding,audio})
yading@10: Set audio bitrate (in bits/s). Default value is 128K.
yading@10: 
yading@10: @item bt @var{integer} (@emph{encoding,video})
yading@10: Set video bitrate tolerance (in bits/s). In 1-pass mode, bitrate
yading@10: tolerance specifies how far ratecontrol is willing to deviate from the
yading@10: target average bitrate value. This is not related to min/max
yading@10: bitrate. Lowering tolerance too much has an adverse effect on quality.
yading@10: 
yading@10: @item flags @var{flags} (@emph{decoding/encoding,audio,video,subtitles})
yading@10: Set generic flags.
yading@10: 
yading@10: Possible values:
yading@10: @table @samp
yading@10: @item mv4
yading@10: Use four motion vector by macroblock (mpeg4).
yading@10: @item qpel
yading@10: Use 1/4 pel motion compensation.
yading@10: @item loop
yading@10: Use loop filter.
yading@10: @item qscale
yading@10: Use fixed qscale.
yading@10: @item gmc
yading@10: Use gmc.
yading@10: @item mv0
yading@10: Always try a mb with mv=<0,0>.
yading@10: @item input_preserved
yading@10: 
yading@10: @item pass1
yading@10: Use internal 2pass ratecontrol in first pass mode.
yading@10: @item pass2
yading@10: Use internal 2pass ratecontrol in second pass mode.
yading@10: @item gray
yading@10: Only decode/encode grayscale.
yading@10: @item emu_edge
yading@10: Do not draw edges.
yading@10: @item psnr
yading@10: Set error[?] variables during encoding.
yading@10: @item truncated
yading@10: 
yading@10: @item naq
yading@10: Normalize adaptive quantization.
yading@10: @item ildct
yading@10: Use interlaced DCT.
yading@10: @item low_delay
yading@10: Force low delay.
yading@10: @item global_header
yading@10: Place global headers in extradata instead of every keyframe.
yading@10: @item bitexact
yading@10: Use only bitexact stuff (except (I)DCT).
yading@10: @item aic
yading@10: Apply H263 advanced intra coding / mpeg4 ac prediction.
yading@10: @item cbp
yading@10: Deprecated, use mpegvideo private options instead.
yading@10: @item qprd
yading@10: Deprecated, use mpegvideo private options instead.
yading@10: @item ilme
yading@10: Apply interlaced motion estimation.
yading@10: @item cgop
yading@10: Use closed gop.
yading@10: @end table
yading@10: 
yading@10: @item sub_id @var{integer}
yading@10: Deprecated, currently unused.
yading@10: 
yading@10: @item me_method @var{integer} (@emph{encoding,video})
yading@10: Set motion estimation method.
yading@10: 
yading@10: Possible values:
yading@10: @table @samp
yading@10: @item zero
yading@10: zero motion estimation (fastest)
yading@10: @item full
yading@10: full motion estimation (slowest)
yading@10: @item epzs
yading@10: EPZS motion estimation (default)
yading@10: @item esa
yading@10: esa motion estimation (alias for full)
yading@10: @item tesa
yading@10: tesa motion estimation
yading@10: @item dia
yading@10: dia motion estimation (alias for epzs)
yading@10: @item log
yading@10: log motion estimation
yading@10: @item phods
yading@10: phods motion estimation
yading@10: @item x1
yading@10: X1 motion estimation
yading@10: @item hex
yading@10: hex motion estimation
yading@10: @item umh
yading@10: umh motion estimation
yading@10: @item iter
yading@10: iter motion estimation
yading@10: @end table
yading@10: 
yading@10: @item extradata_size @var{integer}
yading@10: Set extradata size.
yading@10: 
yading@10: @item time_base @var{rational number}
yading@10: Set codec time base.
yading@10: 
yading@10: It is the fundamental unit of time (in seconds) in terms of which
yading@10: frame timestamps are represented. For fixed-fps content, timebase
yading@10: should be @code{1 / frame_rate} and timestamp increments should be
yading@10: identically 1.
yading@10: 
yading@10: @item g @var{integer} (@emph{encoding,video})
yading@10: Set the group of picture size. Default value is 12.
yading@10: 
yading@10: @item ar @var{integer} (@emph{decoding/encoding,audio})
yading@10: Set audio sampling rate (in Hz).
yading@10: 
yading@10: @item ac @var{integer} (@emph{decoding/encoding,audio})
yading@10: Set number of audio channels.
yading@10: 
yading@10: @item cutoff @var{integer} (@emph{encoding,audio})
yading@10: Set cutoff bandwidth.
yading@10: 
yading@10: @item frame_size @var{integer} (@emph{encoding,audio})
yading@10: Set audio frame size.
yading@10: 
yading@10: Each submitted frame except the last must contain exactly frame_size
yading@10: samples per channel. May be 0 when the codec has
yading@10: CODEC_CAP_VARIABLE_FRAME_SIZE set, in that case the frame size is not
yading@10: restricted. It is set by some decoders to indicate constant frame
yading@10: size.
yading@10: 
yading@10: @item frame_number @var{integer}
yading@10: Set the frame number.
yading@10: 
yading@10: @item delay @var{integer}
yading@10: 
yading@10: @item qcomp @var{float} (@emph{encoding,video})
yading@10: Set video quantizer scale compression (VBR). It is used as a constant
yading@10: in the ratecontrol equation. Recommended range for default rc_eq:
yading@10: 0.0-1.0.
yading@10: 
yading@10: @item qblur @var{float} (@emph{encoding,video})
yading@10: Set video quantizer scale blur (VBR).
yading@10: 
yading@10: @item qmin @var{integer} (@emph{encoding,video})
yading@10: Set min video quantizer scale (VBR). Must be included between -1 and
yading@10: 69, default value is 2.
yading@10: 
yading@10: @item qmax @var{integer} (@emph{encoding,video})
yading@10: Set max video quantizer scale (VBR). Must be included between -1 and
yading@10: 1024, default value is 31.
yading@10: 
yading@10: @item qdiff @var{integer} (@emph{encoding,video})
yading@10: Set max difference between the quantizer scale (VBR).
yading@10: 
yading@10: @item bf @var{integer} (@emph{encoding,video})
yading@10: Set max number of B frames.
yading@10: 
yading@10: @item b_qfactor @var{float} (@emph{encoding,video})
yading@10: Set qp factor between P and B frames.
yading@10: 
yading@10: @item rc_strategy @var{integer} (@emph{encoding,video})
yading@10: Set ratecontrol method.
yading@10: 
yading@10: @item b_strategy @var{integer} (@emph{encoding,video})
yading@10: Set strategy to choose between I/P/B-frames.
yading@10: 
yading@10: @item ps @var{integer} (@emph{encoding,video})
yading@10: Set RTP payload size in bytes.
yading@10: 
yading@10: @item mv_bits @var{integer}
yading@10: @item header_bits @var{integer}
yading@10: @item i_tex_bits @var{integer}
yading@10: @item p_tex_bits @var{integer}
yading@10: @item i_count @var{integer}
yading@10: @item p_count @var{integer}
yading@10: @item skip_count @var{integer}
yading@10: @item misc_bits @var{integer}
yading@10: @item frame_bits @var{integer}
yading@10: @item codec_tag @var{integer}
yading@10: @item bug @var{flags} (@emph{decoding,video})
yading@10: Workaround not auto detected encoder bugs.
yading@10: 
yading@10: Possible values:
yading@10: @table @samp
yading@10: @item autodetect
yading@10: 
yading@10: @item old_msmpeg4
yading@10: some old lavc generated msmpeg4v3 files (no autodetection)
yading@10: @item xvid_ilace
yading@10: Xvid interlacing bug (autodetected if fourcc==XVIX)
yading@10: @item ump4
yading@10: (autodetected if fourcc==UMP4)
yading@10: @item no_padding
yading@10: padding bug (autodetected)
yading@10: @item amv
yading@10: 
yading@10: @item ac_vlc
yading@10: illegal vlc bug (autodetected per fourcc)
yading@10: @item qpel_chroma
yading@10: 
yading@10: @item std_qpel
yading@10: old standard qpel (autodetected per fourcc/version)
yading@10: @item qpel_chroma2
yading@10: 
yading@10: @item direct_blocksize
yading@10: direct-qpel-blocksize bug (autodetected per fourcc/version)
yading@10: @item edge
yading@10: edge padding bug (autodetected per fourcc/version)
yading@10: @item hpel_chroma
yading@10: 
yading@10: @item dc_clip
yading@10: 
yading@10: @item ms
yading@10: Workaround various bugs in microsoft broken decoders.
yading@10: @item trunc
yading@10: trancated frames
yading@10: @end table
yading@10: 
yading@10: @item lelim @var{integer} (@emph{encoding,video})
yading@10: Set single coefficient elimination threshold for luminance (negative
yading@10: values also consider DC coefficient).
yading@10: 
yading@10: @item celim @var{integer} (@emph{encoding,video})
yading@10: Set single coefficient elimination threshold for chrominance (negative
yading@10: values also consider dc coefficient)
yading@10: 
yading@10: @item strict @var{integer} (@emph{decoding/encoding,audio,video})
yading@10: Specify how strictly to follow the standards.
yading@10: 
yading@10: Possible values:
yading@10: @table @samp
yading@10: @item very
yading@10: strictly conform to a older more strict version of the spec or reference software
yading@10: @item strict
yading@10: strictly conform to all the things in the spec no matter what consequences
yading@10: @item normal
yading@10: 
yading@10: @item unofficial
yading@10: allow unofficial extensions
yading@10: @item experimental
yading@10: allow non standardized experimental things
yading@10: @end table
yading@10: 
yading@10: @item b_qoffset @var{float} (@emph{encoding,video})
yading@10: Set QP offset between P and B frames.
yading@10: 
yading@10: @item err_detect @var{flags} (@emph{decoding,audio,video})
yading@10: Set error detection flags.
yading@10: 
yading@10: Possible values:
yading@10: @table @samp
yading@10: @item crccheck
yading@10: verify embedded CRCs
yading@10: @item bitstream
yading@10: detect bitstream specification deviations
yading@10: @item buffer
yading@10: detect improper bitstream length
yading@10: @item explode
yading@10: abort decoding on minor error detection
yading@10: @item careful
yading@10: consider things that violate the spec and have not been seen in the wild as errors
yading@10: @item compliant
yading@10: consider all spec non compliancies as errors
yading@10: @item aggressive
yading@10: consider things that a sane encoder should not do as an error
yading@10: @end table
yading@10: 
yading@10: @item has_b_frames @var{integer}
yading@10: 
yading@10: @item block_align @var{integer}
yading@10: 
yading@10: @item mpeg_quant @var{integer} (@emph{encoding,video})
yading@10: Use MPEG quantizers instead of H.263.
yading@10: 
yading@10: @item qsquish @var{float} (@emph{encoding,video})
yading@10: How to keep quantizer between qmin and qmax (0 = clip, 1 = use
yading@10: differentiable function).
yading@10: 
yading@10: @item rc_qmod_amp @var{float} (@emph{encoding,video})
yading@10: Set experimental quantizer modulation.
yading@10: 
yading@10: @item rc_qmod_freq @var{integer} (@emph{encoding,video})
yading@10: Set experimental quantizer modulation.
yading@10: 
yading@10: @item rc_override_count @var{integer}
yading@10: 
yading@10: @item rc_eq @var{string} (@emph{encoding,video})
yading@10: Set rate control equation. When computing the expression, besides the
yading@10: standard functions defined in the section 'Expression Evaluation', the
yading@10: following functions are available: bits2qp(bits), qp2bits(qp). Also
yading@10: the following constants are available: iTex pTex tex mv fCode iCount
yading@10: mcVar var isI isP isB avgQP qComp avgIITex avgPITex avgPPTex avgBPTex
yading@10: avgTex.
yading@10: 
yading@10: @item maxrate @var{integer} (@emph{encoding,audio,video})
yading@10: Set max bitrate tolerance (in bits/s). Requires bufsize to be set.
yading@10: 
yading@10: @item minrate @var{integer} (@emph{encoding,audio,video})
yading@10: Set min bitrate tolerance (in bits/s). Most useful in setting up a CBR
yading@10: encode. It is of little use elsewise.
yading@10: 
yading@10: @item bufsize @var{integer} (@emph{encoding,audio,video})
yading@10: Set ratecontrol buffer size (in bits).
yading@10: 
yading@10: @item rc_buf_aggressivity @var{float} (@emph{encoding,video})
yading@10: Currently useless.
yading@10: 
yading@10: @item i_qfactor @var{float} (@emph{encoding,video})
yading@10: Set QP factor between P and I frames.
yading@10: 
yading@10: @item i_qoffset @var{float} (@emph{encoding,video})
yading@10: Set QP offset between P and I frames.
yading@10: 
yading@10: @item rc_init_cplx @var{float} (@emph{encoding,video})
yading@10: Set initial complexity for 1-pass encoding.
yading@10: 
yading@10: @item dct @var{integer} (@emph{encoding,video})
yading@10: Set DCT algorithm.
yading@10: 
yading@10: Possible values:
yading@10: @table @samp
yading@10: @item auto
yading@10: autoselect a good one (default)
yading@10: @item fastint
yading@10: fast integer
yading@10: @item int
yading@10: accurate integer
yading@10: @item mmx
yading@10: 
yading@10: @item altivec
yading@10: 
yading@10: @item faan
yading@10: floating point AAN DCT
yading@10: @end table
yading@10: 
yading@10: @item lumi_mask @var{float} (@emph{encoding,video})
yading@10: Compress bright areas stronger than medium ones.
yading@10: 
yading@10: @item tcplx_mask @var{float} (@emph{encoding,video})
yading@10: Set temporal complexity masking.
yading@10: 
yading@10: @item scplx_mask @var{float} (@emph{encoding,video})
yading@10: Set spatial complexity masking.
yading@10: 
yading@10: @item p_mask @var{float} (@emph{encoding,video})
yading@10: Set inter masking.
yading@10: 
yading@10: @item dark_mask @var{float} (@emph{encoding,video})
yading@10: Compress dark areas stronger than medium ones.
yading@10: 
yading@10: @item idct @var{integer} (@emph{decoding/encoding,video})
yading@10: Select IDCT implementation.
yading@10: 
yading@10: Possible values:
yading@10: @table @samp
yading@10: @item auto
yading@10: 
yading@10: @item int
yading@10: 
yading@10: @item simple
yading@10: 
yading@10: @item simplemmx
yading@10: 
yading@10: @item libmpeg2mmx
yading@10: 
yading@10: @item mmi
yading@10: 
yading@10: @item arm
yading@10: 
yading@10: @item altivec
yading@10: 
yading@10: @item sh4
yading@10: 
yading@10: @item simplearm
yading@10: 
yading@10: @item simplearmv5te
yading@10: 
yading@10: @item simplearmv6
yading@10: 
yading@10: @item simpleneon
yading@10: 
yading@10: @item simplealpha
yading@10: 
yading@10: @item h264
yading@10: 
yading@10: @item vp3
yading@10: 
yading@10: @item ipp
yading@10: 
yading@10: @item xvidmmx
yading@10: 
yading@10: @item faani
yading@10: floating point AAN IDCT
yading@10: @end table
yading@10: 
yading@10: @item slice_count @var{integer}
yading@10: 
yading@10: @item ec @var{flags} (@emph{decoding,video})
yading@10: Set error concealment strategy.
yading@10: 
yading@10: Possible values:
yading@10: @table @samp
yading@10: @item guess_mvs
yading@10: iterative motion vector (MV) search (slow)
yading@10: @item deblock
yading@10: use strong deblock filter for damaged MBs
yading@10: @end table
yading@10: 
yading@10: @item bits_per_coded_sample @var{integer}
yading@10: 
yading@10: @item pred @var{integer} (@emph{encoding,video})
yading@10: Set prediction method.
yading@10: 
yading@10: Possible values:
yading@10: @table @samp
yading@10: @item left
yading@10: 
yading@10: @item plane
yading@10: 
yading@10: @item median
yading@10: 
yading@10: @end table
yading@10: 
yading@10: @item aspect @var{rational number} (@emph{encoding,video})
yading@10: Set sample aspect ratio.
yading@10: 
yading@10: @item debug @var{flags} (@emph{decoding/encoding,audio,video,subtitles})
yading@10: Print specific debug info.
yading@10: 
yading@10: Possible values:
yading@10: @table @samp
yading@10: @item pict
yading@10: picture info
yading@10: @item rc
yading@10: rate control
yading@10: @item bitstream
yading@10: 
yading@10: @item mb_type
yading@10: macroblock (MB) type
yading@10: @item qp
yading@10: per-block quantization parameter (QP)
yading@10: @item mv
yading@10: motion vector
yading@10: @item dct_coeff
yading@10: 
yading@10: @item skip
yading@10: 
yading@10: @item startcode
yading@10: 
yading@10: @item pts
yading@10: 
yading@10: @item er
yading@10: error recognition
yading@10: @item mmco
yading@10: memory management control operations (H.264)
yading@10: @item bugs
yading@10: 
yading@10: @item vis_qp
yading@10: visualize quantization parameter (QP), lower QP are tinted greener
yading@10: @item vis_mb_type
yading@10: visualize block types
yading@10: @item buffers
yading@10: picture buffer allocations
yading@10: @item thread_ops
yading@10: threading operations
yading@10: @end table
yading@10: 
yading@10: @item vismv @var{integer} (@emph{decoding,video})
yading@10: Visualize motion vectors (MVs).
yading@10: 
yading@10: Possible values:
yading@10: @table @samp
yading@10: @item pf
yading@10: forward predicted MVs of P-frames
yading@10: @item bf
yading@10: forward predicted MVs of B-frames
yading@10: @item bb
yading@10: backward predicted MVs of B-frames
yading@10: @end table
yading@10: 
yading@10: @item cmp @var{integer} (@emph{encoding,video})
yading@10: Set full pel me compare function.
yading@10: 
yading@10: Possible values:
yading@10: @table @samp
yading@10: @item sad
yading@10: sum of absolute differences, fast (default)
yading@10: @item sse
yading@10: sum of squared errors
yading@10: @item satd
yading@10: sum of absolute Hadamard transformed differences
yading@10: @item dct
yading@10: sum of absolute DCT transformed differences
yading@10: @item psnr
yading@10: sum of squared quantization errors (avoid, low quality)
yading@10: @item bit
yading@10: number of bits needed for the block
yading@10: @item rd
yading@10: rate distortion optimal, slow
yading@10: @item zero
yading@10: 0
yading@10: @item vsad
yading@10: sum of absolute vertical differences
yading@10: @item vsse
yading@10: sum of squared vertical differences
yading@10: @item nsse
yading@10: noise preserving sum of squared differences
yading@10: @item w53
yading@10: 5/3 wavelet, only used in snow
yading@10: @item w97
yading@10: 9/7 wavelet, only used in snow
yading@10: @item dctmax
yading@10: 
yading@10: @item chroma
yading@10: 
yading@10: @end table
yading@10: 
yading@10: @item subcmp @var{integer} (@emph{encoding,video})
yading@10: Set sub pel me compare function.
yading@10: 
yading@10: Possible values:
yading@10: @table @samp
yading@10: @item sad
yading@10: sum of absolute differences, fast (default)
yading@10: @item sse
yading@10: sum of squared errors
yading@10: @item satd
yading@10: sum of absolute Hadamard transformed differences
yading@10: @item dct
yading@10: sum of absolute DCT transformed differences
yading@10: @item psnr
yading@10: sum of squared quantization errors (avoid, low quality)
yading@10: @item bit
yading@10: number of bits needed for the block
yading@10: @item rd
yading@10: rate distortion optimal, slow
yading@10: @item zero
yading@10: 0
yading@10: @item vsad
yading@10: sum of absolute vertical differences
yading@10: @item vsse
yading@10: sum of squared vertical differences
yading@10: @item nsse
yading@10: noise preserving sum of squared differences
yading@10: @item w53
yading@10: 5/3 wavelet, only used in snow
yading@10: @item w97
yading@10: 9/7 wavelet, only used in snow
yading@10: @item dctmax
yading@10: 
yading@10: @item chroma
yading@10: 
yading@10: @end table
yading@10: 
yading@10: @item mbcmp @var{integer} (@emph{encoding,video})
yading@10: Set macroblock compare function.
yading@10: 
yading@10: Possible values:
yading@10: @table @samp
yading@10: @item sad
yading@10: sum of absolute differences, fast (default)
yading@10: @item sse
yading@10: sum of squared errors
yading@10: @item satd
yading@10: sum of absolute Hadamard transformed differences
yading@10: @item dct
yading@10: sum of absolute DCT transformed differences
yading@10: @item psnr
yading@10: sum of squared quantization errors (avoid, low quality)
yading@10: @item bit
yading@10: number of bits needed for the block
yading@10: @item rd
yading@10: rate distortion optimal, slow
yading@10: @item zero
yading@10: 0
yading@10: @item vsad
yading@10: sum of absolute vertical differences
yading@10: @item vsse
yading@10: sum of squared vertical differences
yading@10: @item nsse
yading@10: noise preserving sum of squared differences
yading@10: @item w53
yading@10: 5/3 wavelet, only used in snow
yading@10: @item w97
yading@10: 9/7 wavelet, only used in snow
yading@10: @item dctmax
yading@10: 
yading@10: @item chroma
yading@10: 
yading@10: @end table
yading@10: 
yading@10: @item ildctcmp @var{integer} (@emph{encoding,video})
yading@10: Set interlaced dct compare function.
yading@10: 
yading@10: Possible values:
yading@10: @table @samp
yading@10: @item sad
yading@10: sum of absolute differences, fast (default)
yading@10: @item sse
yading@10: sum of squared errors
yading@10: @item satd
yading@10: sum of absolute Hadamard transformed differences
yading@10: @item dct
yading@10: sum of absolute DCT transformed differences
yading@10: @item psnr
yading@10: sum of squared quantization errors (avoid, low quality)
yading@10: @item bit
yading@10: number of bits needed for the block
yading@10: @item rd
yading@10: rate distortion optimal, slow
yading@10: @item zero
yading@10: 0
yading@10: @item vsad
yading@10: sum of absolute vertical differences
yading@10: @item vsse
yading@10: sum of squared vertical differences
yading@10: @item nsse
yading@10: noise preserving sum of squared differences
yading@10: @item w53
yading@10: 5/3 wavelet, only used in snow
yading@10: @item w97
yading@10: 9/7 wavelet, only used in snow
yading@10: @item dctmax
yading@10: 
yading@10: @item chroma
yading@10: 
yading@10: @end table
yading@10: 
yading@10: @item dia_size @var{integer} (@emph{encoding,video})
yading@10: Set diamond type & size for motion estimation.
yading@10: 
yading@10: @item last_pred @var{integer} (@emph{encoding,video})
yading@10: Set amount of motion predictors from the previous frame.
yading@10: 
yading@10: @item preme @var{integer} (@emph{encoding,video})
yading@10: Set pre motion estimation.
yading@10: 
yading@10: @item precmp @var{integer} (@emph{encoding,video})
yading@10: Set pre motion estimation compare function.
yading@10: 
yading@10: Possible values:
yading@10: @table @samp
yading@10: @item sad
yading@10: sum of absolute differences, fast (default)
yading@10: @item sse
yading@10: sum of squared errors
yading@10: @item satd
yading@10: sum of absolute Hadamard transformed differences
yading@10: @item dct
yading@10: sum of absolute DCT transformed differences
yading@10: @item psnr
yading@10: sum of squared quantization errors (avoid, low quality)
yading@10: @item bit
yading@10: number of bits needed for the block
yading@10: @item rd
yading@10: rate distortion optimal, slow
yading@10: @item zero
yading@10: 0
yading@10: @item vsad
yading@10: sum of absolute vertical differences
yading@10: @item vsse
yading@10: sum of squared vertical differences
yading@10: @item nsse
yading@10: noise preserving sum of squared differences
yading@10: @item w53
yading@10: 5/3 wavelet, only used in snow
yading@10: @item w97
yading@10: 9/7 wavelet, only used in snow
yading@10: @item dctmax
yading@10: 
yading@10: @item chroma
yading@10: 
yading@10: @end table
yading@10: 
yading@10: @item pre_dia_size @var{integer} (@emph{encoding,video})
yading@10: Set diamond type & size for motion estimation pre-pass.
yading@10: 
yading@10: @item subq @var{integer} (@emph{encoding,video})
yading@10: Set sub pel motion estimation quality.
yading@10: 
yading@10: @item dtg_active_format @var{integer}
yading@10: 
yading@10: @item me_range @var{integer} (@emph{encoding,video})
yading@10: Set limit motion vectors range (1023 for DivX player).
yading@10: 
yading@10: @item ibias @var{integer} (@emph{encoding,video})
yading@10: Set intra quant bias.
yading@10: 
yading@10: @item pbias @var{integer} (@emph{encoding,video})
yading@10: Set inter quant bias.
yading@10: 
yading@10: @item color_table_id @var{integer}
yading@10: 
yading@10: @item global_quality @var{integer} (@emph{encoding,audio,video})
yading@10: 
yading@10: @item coder @var{integer} (@emph{encoding,video})
yading@10: 
yading@10: Possible values:
yading@10: @table @samp
yading@10: @item vlc
yading@10: variable length coder / huffman coder
yading@10: @item ac
yading@10: arithmetic coder
yading@10: @item raw
yading@10: raw (no encoding)
yading@10: @item rle
yading@10: run-length coder
yading@10: @item deflate
yading@10: deflate-based coder
yading@10: @end table
yading@10: 
yading@10: @item context @var{integer} (@emph{encoding,video})
yading@10: Set context model.
yading@10: 
yading@10: @item slice_flags @var{integer}
yading@10: 
yading@10: @item xvmc_acceleration @var{integer}
yading@10: 
yading@10: @item mbd @var{integer} (@emph{encoding,video})
yading@10: Set macroblock decision algorithm (high quality mode).
yading@10: 
yading@10: Possible values:
yading@10: @table @samp
yading@10: @item simple
yading@10: use mbcmp (default)
yading@10: @item bits
yading@10: use fewest bits
yading@10: @item rd
yading@10: use best rate distortion
yading@10: @end table
yading@10: 
yading@10: @item stream_codec_tag @var{integer}
yading@10: 
yading@10: @item sc_threshold @var{integer} (@emph{encoding,video})
yading@10: Set scene change threshold.
yading@10: 
yading@10: @item lmin @var{integer} (@emph{encoding,video})
yading@10: Set min lagrange factor (VBR).
yading@10: 
yading@10: @item lmax @var{integer} (@emph{encoding,video})
yading@10: Set max lagrange factor (VBR).
yading@10: 
yading@10: @item nr @var{integer} (@emph{encoding,video})
yading@10: Set noise reduction.
yading@10: 
yading@10: @item rc_init_occupancy @var{integer} (@emph{encoding,video})
yading@10: Set number of bits which should be loaded into the rc buffer before
yading@10: decoding starts.
yading@10: 
yading@10: @item inter_threshold @var{integer} (@emph{encoding,video})
yading@10: 
yading@10: @item flags2 @var{flags} (@emph{decoding/encoding,audio,video})
yading@10: 
yading@10: Possible values:
yading@10: @table @samp
yading@10: @item fast
yading@10: allow non spec compliant speedup tricks
yading@10: @item sgop
yading@10: Deprecated, use mpegvideo private options instead
yading@10: @item noout
yading@10: skip bitstream encoding
yading@10: @item local_header
yading@10: place global headers at every keyframe instead of in extradata
yading@10: @item chunks
yading@10: Frame data might be split into multiple chunks
yading@10: @item showall
yading@10: Show all frames before the first keyframe
yading@10: @item skiprd
yading@10: Deprecated, use mpegvideo private options instead
yading@10: @end table
yading@10: 
yading@10: @item error @var{integer} (@emph{encoding,video})
yading@10: 
yading@10: @item qns @var{integer} (@emph{encoding,video})
yading@10: Deprecated, use mpegvideo private options instead.
yading@10: 
yading@10: @item threads @var{integer} (@emph{decoding/encoding,video})
yading@10: 
yading@10: Possible values:
yading@10: @table @samp
yading@10: @item auto
yading@10: detect a good number of threads
yading@10: @end table
yading@10: 
yading@10: @item me_threshold @var{integer} (@emph{encoding,video})
yading@10: Set motion estimation threshold.
yading@10: 
yading@10: @item mb_threshold @var{integer} (@emph{encoding,video})
yading@10: Set macroblock threshold.
yading@10: 
yading@10: @item dc @var{integer} (@emph{encoding,video})
yading@10: Set intra_dc_precision.
yading@10: 
yading@10: @item nssew @var{integer} (@emph{encoding,video})
yading@10: Set nsse weight.
yading@10: 
yading@10: @item skip_top @var{integer} (@emph{decoding,video})
yading@10: Set number of macroblock rows at the top which are skipped.
yading@10: 
yading@10: @item skip_bottom @var{integer} (@emph{decoding,video})
yading@10: Set number of macroblock rows at the bottom which are skipped.
yading@10: 
yading@10: @item profile @var{integer} (@emph{encoding,audio,video})
yading@10: 
yading@10: Possible values:
yading@10: @table @samp
yading@10: @item unknown
yading@10: 
yading@10: @item aac_main
yading@10: 
yading@10: @item aac_low
yading@10: 
yading@10: @item aac_ssr
yading@10: 
yading@10: @item aac_ltp
yading@10: 
yading@10: @item aac_he
yading@10: 
yading@10: @item aac_he_v2
yading@10: 
yading@10: @item aac_ld
yading@10: 
yading@10: @item aac_eld
yading@10: 
yading@10: @item dts
yading@10: 
yading@10: @item dts_es
yading@10: 
yading@10: @item dts_96_24
yading@10: 
yading@10: @item dts_hd_hra
yading@10: 
yading@10: @item dts_hd_ma
yading@10: 
yading@10: @end table
yading@10: 
yading@10: @item level @var{integer} (@emph{encoding,audio,video})
yading@10: 
yading@10: Possible values:
yading@10: @table @samp
yading@10: @item unknown
yading@10: 
yading@10: @end table
yading@10: 
yading@10: @item lowres @var{integer} (@emph{decoding,audio,video})
yading@10: Decode at 1= 1/2, 2=1/4, 3=1/8 resolutions.
yading@10: 
yading@10: @item skip_threshold @var{integer} (@emph{encoding,video})
yading@10: Set frame skip threshold.
yading@10: 
yading@10: @item skip_factor @var{integer} (@emph{encoding,video})
yading@10: Set frame skip factor.
yading@10: 
yading@10: @item skip_exp @var{integer} (@emph{encoding,video})
yading@10: Set frame skip exponent.
yading@10: 
yading@10: @item skipcmp @var{integer} (@emph{encoding,video})
yading@10: Set frame skip compare function.
yading@10: 
yading@10: Possible values:
yading@10: @table @samp
yading@10: @item sad
yading@10: sum of absolute differences, fast (default)
yading@10: @item sse
yading@10: sum of squared errors
yading@10: @item satd
yading@10: sum of absolute Hadamard transformed differences
yading@10: @item dct
yading@10: sum of absolute DCT transformed differences
yading@10: @item psnr
yading@10: sum of squared quantization errors (avoid, low quality)
yading@10: @item bit
yading@10: number of bits needed for the block
yading@10: @item rd
yading@10: rate distortion optimal, slow
yading@10: @item zero
yading@10: 0
yading@10: @item vsad
yading@10: sum of absolute vertical differences
yading@10: @item vsse
yading@10: sum of squared vertical differences
yading@10: @item nsse
yading@10: noise preserving sum of squared differences
yading@10: @item w53
yading@10: 5/3 wavelet, only used in snow
yading@10: @item w97
yading@10: 9/7 wavelet, only used in snow
yading@10: @item dctmax
yading@10: 
yading@10: @item chroma
yading@10: 
yading@10: @end table
yading@10: 
yading@10: @item border_mask @var{float} (@emph{encoding,video})
yading@10: Increase the quantizer for macroblocks close to borders.
yading@10: 
yading@10: @item mblmin @var{integer} (@emph{encoding,video})
yading@10: Set min macroblock lagrange factor (VBR).
yading@10: 
yading@10: @item mblmax @var{integer} (@emph{encoding,video})
yading@10: Set max macroblock lagrange factor (VBR).
yading@10: 
yading@10: @item mepc @var{integer} (@emph{encoding,video})
yading@10: Set motion estimation bitrate penalty compensation (1.0 = 256).
yading@10: 
yading@10: @item skip_loop_filter @var{integer} (@emph{decoding,video})
yading@10: @item skip_idct        @var{integer} (@emph{decoding,video})
yading@10: @item skip_frame       @var{integer} (@emph{decoding,video})
yading@10: 
yading@10: Make decoder discard processing depending on the frame type selected
yading@10: by the option value.
yading@10: 
yading@10: @option{skip_loop_filter} skips frame loop filtering, @option{skip_idct}
yading@10: skips frame IDCT/dequantization, @option{skip_frame} skips decoding.
yading@10: 
yading@10: Possible values:
yading@10: @table @samp
yading@10: @item none
yading@10: Discard no frame.
yading@10: 
yading@10: @item default
yading@10: Discard useless frames like 0-sized frames.
yading@10: 
yading@10: @item noref
yading@10: Discard all non-reference frames.
yading@10: 
yading@10: @item bidir
yading@10: Discard all bidirectional frames.
yading@10: 
yading@10: @item nokey
yading@10: Discard all frames excepts keyframes.
yading@10: 
yading@10: @item all
yading@10: Discard all frames.
yading@10: @end table
yading@10: 
yading@10: Default value is @samp{default}.
yading@10: 
yading@10: @item bidir_refine @var{integer} (@emph{encoding,video})
yading@10: Refine the two motion vectors used in bidirectional macroblocks.
yading@10: 
yading@10: @item brd_scale @var{integer} (@emph{encoding,video})
yading@10: Downscale frames for dynamic B-frame decision.
yading@10: 
yading@10: @item keyint_min @var{integer} (@emph{encoding,video})
yading@10: Set minimum interval between IDR-frames.
yading@10: 
yading@10: @item refs @var{integer} (@emph{encoding,video})
yading@10: Set reference frames to consider for motion compensation.
yading@10: 
yading@10: @item chromaoffset @var{integer} (@emph{encoding,video})
yading@10: Set chroma qp offset from luma.
yading@10: 
yading@10: @item trellis @var{integer} (@emph{encoding,audio,video})
yading@10: Set rate-distortion optimal quantization.
yading@10: 
yading@10: @item sc_factor @var{integer} (@emph{encoding,video})
yading@10: Set value multiplied by qscale for each frame and added to
yading@10: scene_change_score.
yading@10: 
yading@10: @item mv0_threshold @var{integer} (@emph{encoding,video})
yading@10: @item b_sensitivity @var{integer} (@emph{encoding,video})
yading@10: Adjust sensitivity of b_frame_strategy 1.
yading@10: 
yading@10: @item compression_level @var{integer} (@emph{encoding,audio,video})
yading@10: @item min_prediction_order @var{integer} (@emph{encoding,audio})
yading@10: @item max_prediction_order @var{integer} (@emph{encoding,audio})
yading@10: @item timecode_frame_start @var{integer} (@emph{encoding,video})
yading@10: Set GOP timecode frame start number, in non drop frame format.
yading@10: 
yading@10: @item request_channels @var{integer} (@emph{decoding,audio})
yading@10: Set desired number of audio channels.
yading@10: 
yading@10: @item bits_per_raw_sample @var{integer}
yading@10: @item channel_layout @var{integer} (@emph{decoding/encoding,audio})
yading@10: 
yading@10: Possible values:
yading@10: @table @samp
yading@10: @end table
yading@10: @item request_channel_layout @var{integer} (@emph{decoding,audio})
yading@10: 
yading@10: Possible values:
yading@10: @table @samp
yading@10: @end table
yading@10: @item rc_max_vbv_use @var{float} (@emph{encoding,video})
yading@10: @item rc_min_vbv_use @var{float} (@emph{encoding,video})
yading@10: @item ticks_per_frame @var{integer} (@emph{decoding/encoding,audio,video})
yading@10: @item color_primaries @var{integer} (@emph{decoding/encoding,video})
yading@10: @item color_trc @var{integer} (@emph{decoding/encoding,video})
yading@10: @item colorspace @var{integer} (@emph{decoding/encoding,video})
yading@10: @item color_range @var{integer} (@emph{decoding/encoding,video})
yading@10: @item chroma_sample_location @var{integer} (@emph{decoding/encoding,video})
yading@10: 
yading@10: @item log_level_offset @var{integer}
yading@10: Set the log level offset.
yading@10: 
yading@10: @item slices @var{integer} (@emph{encoding,video})
yading@10: Number of slices, used in parallelized encoding.
yading@10: 
yading@10: @item thread_type @var{flags} (@emph{decoding/encoding,video})
yading@10: Select multithreading type.
yading@10: 
yading@10: Possible values:
yading@10: @table @samp
yading@10: @item slice
yading@10: 
yading@10: @item frame
yading@10: 
yading@10: @end table
yading@10: @item audio_service_type @var{integer} (@emph{encoding,audio})
yading@10: Set audio service type.
yading@10: 
yading@10: Possible values:
yading@10: @table @samp
yading@10: @item ma
yading@10: Main Audio Service
yading@10: @item ef
yading@10: Effects
yading@10: @item vi
yading@10: Visually Impaired
yading@10: @item hi
yading@10: Hearing Impaired
yading@10: @item di
yading@10: Dialogue
yading@10: @item co
yading@10: Commentary
yading@10: @item em
yading@10: Emergency
yading@10: @item vo
yading@10: Voice Over
yading@10: @item ka
yading@10: Karaoke
yading@10: @end table
yading@10: 
yading@10: @item request_sample_fmt @var{sample_fmt} (@emph{decoding,audio})
yading@10: Set sample format audio decoders should prefer. Default value is
yading@10: @code{none}.
yading@10: 
yading@10: @item pkt_timebase @var{rational number}
yading@10: 
yading@10: @item sub_charenc @var{encoding} (@emph{decoding,subtitles})
yading@10: Set the input subtitles character encoding.
yading@10: @end table
yading@10: 
yading@10: @c man end CODEC OPTIONS
yading@10: 
yading@10: @include decoders.texi
yading@10: @include encoders.texi