FFmpeg command to change bit rate of video,audio easily.
Theideabehind2-passencodingisthatbyrunningFFmpegtwiceitcanfirstanalyzethevideotodecidehowtobestallocatethebitstomeetthespecific ...,Thiswillputtheoutputintoajsonfileandputthebitrateofallstreamsofthefile.Theseareusuallythebitratesforvideoandaudio....。參考影片的文章的如下: