![]() ![]() Set strategy to choose between I/P/B-frames. If a value of -1 is used, it will choose an automatic value Set max number of B frames between non-B-frames. Set max difference between the quantizer scale (VBR). Set video quantizer scale compression (VBR). It is set by some decoders to indicate constant frameĭelay integer qcomp float ( encoding,video) ![]() May be 0 when the codec hasĬODEC_CAP_VARIABLE_FRAME_SIZE set, in that case the frame size is not Their respective documentation sections.)Įach submitted frame except the last must contain exactly frame_size (Supported only by selected encoders, see Should be 1 / frame_rate and timestamp increments should be It is the fundamental unit of time (in seconds) in terms of whichįrame timestamps are represented. Output even potentially corrupted frames. Its primary use is for regression testing.Īpply H263 advanced intra coding / mpeg4 ac prediction.ĭeprecated, use mpegvideo private options instead. This ensures that file and data checksums are reproducible and match between Only write platform-, build- and time-independent data. Place global headers in extradata instead of every keyframe. ![]() Input bitstream might be randomly truncated.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 second pass mode. Use internal 2pass ratecontrol in first pass mode. Use four motion vector by macroblock (mpeg4). Lowering tolerance too much has an adverse effect on quality.įlags flags ( decoding/encoding,audio,video,subtitles) Tolerance specifies how far ratecontrol is willing to deviate from the Options may be set by specifying - option value in theįFmpeg tools, or by setting the value explicitly in theĪVCodecContext options or using the libavutil/opt.h API ![]() Sometimes, a global option may only affect a specific kind of codec,Īnd may be nonsensical or ignored by another, so you need to be aware So-called private options, which are specific for a given codec. Libavcodec provides some generic global options, which can be set onĪll the encoders and decoders. This document describes the codecs (decoders and encoders) provided by 8.2.4 Floating-Point-Only AC-3 Encoding Options.8.2.2.2 Extended Bitstream Information - Part 2.8.2.2.1 Extended Bitstream Information - Part 1. ![]()
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