[FFmpeg-devel] aac variable encoding

[Yufei He]

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.ts  -vsync 0 -vcodec m264 -b:v 10M 
8_ff.mp4

Thanks.

Yufei.