J2k codec for mac how to#
How to keep quantizer between qmin and qmax (0 = clip, 1 = use differentiable Has_b_frames integer block_align integer mpeg_quant integer ( encoding,video ) This option will not result in a video that is pleasing to watch in case ofĬonsider things that violate the spec and have not been seen in the wild as errorsĬonsider all spec non compliancies as errorsĬonsider things that a sane encoder should not do as an error This is useful if you want toĪnalyze the content of a video and thus want everything to be decoded no matter Ignore decoding errors, and continue decoding. Pose a security risk, do not use this for decoding untrusted input.Įrr_detect flags ( decoding,audio,video )ĭetect bitstream specification deviations Progress/not well tested) decoders and encoders.
Strictly conform to all the things in the spec no matter what consequencesĪllow non standardized experimental things, experimental (unfinished/work in
J2k codec for mac software#
Strictly conform to an older more strict version of the spec or reference software Specify how strictly to follow the standards. Strict integer ( decoding/encoding,audio,video ) Set single coefficient elimination threshold for chrominance (negative values also Set single coefficient elimination threshold for luminance (negative values also Hpel_chroma dc_clip ms Workaround various bugs in microsoft broken decoders. Old standard qpel (autodetected per fourcc/version)ĭirect-qpel-blocksize bug (autodetected per fourcc/version)Įdge padding bug (autodetected per fourcc/version) Illegal vlc bug (autodetected per fourcc) Xvid interlacing bug (autodetected if fourcc=XVIX) Some old lavc generated msmpeg4v3 files (no autodetection) Workaround not auto detected encoder bugs. Mv_bits integer header_bits integer i_tex_bits integer p_tex_bits integer i_count integer p_count integer skip_count integer misc_bits integer frame_bits integer codec_tag integer bug flags ( decoding,video ) Set strategy to choose between I/P/B-frames. Of -1 is used, it will choose an automatic value depending on the encoder. Set max number of B frames between non-B-frames. Set max difference between the quantizer scale (VBR). Must be included between -1 and 69, default value Recommended range for default rc_eq: 0.0-1.0. Set video quantizer scale compression (VBR). It is set by some decoders to indicate constantĭelay integer qcomp float ( encoding,video ) May be 0 when the codec has CODEC_CAP_VARIABLE_FRAME_SIZE set, in that case (Supported only by selected encoders, see their respectiveĮach submitted frame except the last must contain exactly frame_size samples perĬhannel.
For fixed-fps content, timebase should be "1 / frame_rate" and timestamp It is the fundamental unit of time (in seconds) in terms of which frame timestamps are Its primary use is for regression testing.Īic Apply H263 advanced intra coding / mpeg4 ac prediction.Ĭbp Deprecated, use mpegvideo private options instead.ĭeprecated, use mpegvideo private options instead.Įsa esa motion estimation (alias for full)ĭia dia motion estimation (alias for epzs)
ThisĮnsures that file and data checksums are reproducible and match between platforms. Only write platform-, build- and time-independent data. Place global headers in extradata instead of every keyframe. Use internal 2pass ratecontrol in second pass mode.ĭon't output frames whose parameters differ from first decoded frame in stream.Įrror AVERROR_INPUT_CHANGED is returned when a frame is dropped. Use internal 2pass ratecontrol in first pass mode. Mv4 Use four motion vector by macroblock (mpeg4). Lowering tolerance too much has an adverse effectįlags flags ( decoding/encoding,audio,video,subtitles ) How far ratecontrol is willing to deviate from the target average bitrate value. In 1-pass mode, bitrate tolerance specifies Value explicitly in the "AVCodecContext" options or using the libavutil/opt.h API for Options may be set by specifying - option value in the FFmpeg tools, or by setting the Also some options are meant only for decoding or encoding. Nonsensical or ignored by another, so you need to be aware of the meaning of the specified Sometimes, a global option may only affect a specific kind of codec, and may be In addition each codec may support so-called private options, which are specific Libavcodec provides some generic global options, which can be set on all the encoders andĭecoders. This document describes the codecs (decoders and encoders) provided by the libavcodec
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