[FFmpeg-user] A/V sync issues & more with MediaPortal recording of ClearQAM

Mr M redpenguinmail at gmail.com
Tue Feb 4 19:44:33 CET 2014

My output is:

Sample File is:


ffmpeg really seems to have issues with at least the first 30 seconds of
the original/sample. I know when you do TV recordings, the beginning/end
always seem to be messed up but ffmpeg seemed to not like the beginning o f
this one at all. I would get A/V issues immediately if I did not skip to at
least 30 sec in using -ss.

I attempted to take -async 1 off but after the first commercial break is
about over, you hear the program's audio yet commercials are still playing.

On Tue, Feb 4, 2014 at 5:03 AM, Carl Eugen Hoyos <cehoyos at ag.or.at> wrote:

> Mr M <redpenguinmail <at> gmail.com> writes:
> > "ffmpeg.exe -i FILE.ts -vcodec libxvid -vtag XVID
> > -vf scale=720:480 -aspect 4:3 -maxrate 1200k -b:v 981k
> > -qmin 3 -qmax 5 -bufsize 4096 -deinterlace
> > -acodec libmp3lame -b:a 128k -ac 2 -async 1 OUT.avi"
> (Completely unrelated: Instead of using "-vf scale -aspect
> -deinterlace" you should use something like "-vf yadif,scale"
> or "-vf yadif,scale,setdar".)
> Complete, uncut console output missing.
> [...]
> > VLC can play the file fine also changing sizes during
> > commericals but ffmpeg seems to lose A/V sync the more
> > times it hits a commerical break.
> Is this also reproducible without -async 1? If not, please
> remove it.
> Please provide a sample that allows to reproduce the problem.
> Carl Eugen
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