[FFmpeg-user] overlay with video offset not starting audio with same offset

[Paul B Mahol]

Dana 29. 8. 2015. 01:09 osoba "Chad Horton" <chorton at hotsalsainteractive.com>
napisala je:
>
> Hi.  Thank you.  I¹m having a difficult time determining where exactly I¹m
> supposed to add the adelay=20000.  I¹ve tried adding it in various places,
> each throwing errors.
>

Actually, atrim filter should be better solution.

>
>
> On 8/28/15, 2:58 PM, "ffmpeg-user on behalf of Paul B Mahol"
> <ffmpeg-user-bounces at ffmpeg.org on behalf of onemda at gmail.com> wrote:
>
> >Dana 28. 8. 2015. 23:15 osoba "Chad Horton"
> ><chorton at hotsalsainteractive.com>
> >napisala je:
> >>
> >> I have a video with audio (overlayvideo.mov) that I'm overlaying over
> >another video (basefilem.mp4) and I'm starting the overlay at 20 seconds.
> >The output (finalvideo.mp4) looks great, but the audio from the overlay
is
> >still starting at 00:00:00.000 instead of when I need it to start, which
> >is
> >00:00:20.000 (which I set with itoffset).
> >>
> >> I understand that itoffset only deals with video.  So, how do I go
about
> >specifying in my command below to start the audio in the overlay at the
> >same time as itoffset?
> >
> >Try adelay filter.
> >
> >>
> >> ffmpeg -y -i basefilem.mp4 -itoffset 00:00:20.000 -i overlayvide.mov -
> >ilter_complex
>
>"[1:v]scale=1280x720[ovrl];[0:v][ovrl]overlay=eof_action=pass[outv];[0:a][
> >1:a]amix[outa]"
> >-map [outv] -map [outa] -c:v mpeg4 -strict experimental -ascale:v 10
> >finalvideo.mp4
> >>
> >>
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