[FFmpeg-devel] aac variable encoding

Dominik 'Rathann' Mierzejewski dominik at greysector.net
Fri Mar 22 12:26:57 EET 2019


On Thursday, 21 March 2019 at 19:38, Yufei He wrote:
> Hi
> 
> On transcoding from 1080p .ts files to .mp4 files with my m264 codec, 
> audio of the output .mp4 files stutters.
> 
> We found audio of the stuttering files is vbr.
> 
> I did not set aac encoding bitrate. somehow it becomes vbr when I use my 
> m264 codec on transcoding 1080p files.
> 
> It works well for 1080i .ts files and all .mp4 and .mov files, and aac 
> audio of the output files is cbr.
> 
> So the problem is why aac encoding becomes vbr.
> 
> Command I use is:
> 
> ./ffmpeg -i TS/TSv2m2641080p30mcbr.tsĀ  -vsync 0 -vcodec m264 -b:v 10M 
> 8_ff.mp4

THis is not a question related to development of FFmpeg but a question
about FFmpeg usage, therefore it belongs to the ffmpeg-user mailing
list: https://lists.ffmpeg.org/mailman/listinfo/ffmpeg-user/

Please post such questions there in the future as they're off-topic
here.

Regards,
Dominik
-- 
Fedora   https://getfedora.org  |  RPM Fusion  http://rpmfusion.org
There should be a science of discontent. People need hard times and
oppression to develop psychic muscles.
        -- from "Collected Sayings of Muad'Dib" by the Princess Irulan


More information about the ffmpeg-devel mailing list