[FFmpeg-user] Predicting Transcoding Parameters

Carl Eugen Hoyos ceffmpeg at gmail.com
Sat Aug 20 09:17:10 EEST 2016


> Am 20.08.2016 um 05:08 schrieb s00b4u 4u <s00b4u at gmail.com>:
> For example, my source file is MOV file. It's Video Bitrate is: 122113 KB/s
> and Audio Bitrate is: 1536 KB/s.
> I want to convert it into an MP4 file with Video Bitrate: 11 MB/s and Audio
> Bitrate: 256 KB/s.
> When I tried to do this transcoding, I used command:
> ffmpeg -i myfile.mov -vcodec libx264 -acodec copy myfile.mp4

How is FFmpeg supposed to know that you want 11MB/s?
If input audio has 1536k and you want 256k -acodec copy will not help...
Try "-b:v 11M -acodec ac3 -b:a 256k"

Carl Eugen

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