It is the fundamental unit of time (in seconds) in terms of time_base rational number Set codec time base. output_corrupt Output even potentially corrupted frames. aic Apply H263 advanced intra coding / mpeg4 ac prediction. Its primary use is for regression testing. This ensures that file and data checksums are reproducible and matchīetween platforms. bitexact Only write platform-, build- and time-independent data. global_header Place global headers in extradata instead of every keyframe. Error AVERROR_INPUT_CHANGED is returned when a frame isĭropped. drop_changed Don't output frames whose parameters differ from first decoded frame in truncated Input bitstream might be randomly truncated. psnr Set error variables during encoding. pass2 Use internal 2pass ratecontrol in second pass mode. pass1 Use internal 2pass ratecontrol in first pass mode. Mv4 Use four motion vector by macroblock (mpeg4). flags flags ( decoding/encoding,audio,video,subtitles ) Set generic flags.

Tolerance too much has an adverse effect on quality. Specifies how far ratecontrol is willing to deviate from the targetĪverage bitrate value. bt integer ( encoding,video ) Set video bitrate tolerance (in bits/s). ab integer ( encoding,audio ) Set audio bitrate (in bits/s).

The list of supported options follow: b integer ( encoding,audio,video ) Set bitrate in bits/s. Libavutil/opt.h API for programmatic use. The FFmpeg tools, or by setting the value explicitly in the Options may be set by specifying - option value in Sometimes, a global option may only affect a specific kind ofĬodec, and 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 This document describes the codecs (decoders and encoders) Ffmpeg-codecs - FFmpeg codecs DESCRIPTION

Ffmpeg decoder