[FFmpeg-user] Replacing First 90 Seconds of a Video with Silence or with Another Audio Clip

[Sam Logan]

Please, can someone help by writing out actual commands? Thanks.

On Mon, Jan 18, 2016 at 10:12 AM, Paul B Mahol <onemda at gmail.com> wrote:

> On 1/17/16, Sam Logan <shapableline at gmail.com> wrote:
> > I have a video AVI file, "Video.avi", consisting of a video and an audio
> > track, and a separate audio file, "Audio.mp3". I want to do the following
> > two things:
> >
> > (1)
> >
> > First, I want to produce a version of the video, "OutputSilenced.avi",
> > which would be identical to the original video except that the first 90
> > seconds of the video's audio are replaced with silence (to clarify, I
> want
> > to REPLACE, as in overwrite, the first 90 seconds, NOT insert 90 seconds
> of
> > silence to push the audio back 90 seconds).
> >
> > (2)
> >
> > Second, I want to produce a version of the video, "OutputReplaced.avi",
> > which would be identical to the original video except that the first 90
> > seconds of the video's audio are replaced with the first 90 seconds of
> > "Audio.mp3" (again, to be clear, I want to REPLACE, as in overwrite, the
> > first 90 seconds, NOT insert 90 seconds of audio to push the original
> audio
> > back 90 seconds).
> >
> > How commands would I use to do this with FFmpeg? Ideally, I would like to
> > just remux without doing any re-encoding. Thanks in advance.
>
> With trimming original video's audio and using concat demuxer to
> insert silence/audio.
>
> So, some combination of trimming and concat demuxer.
> _______________________________________________
> ffmpeg-user mailing list
> ffmpeg-user at ffmpeg.org
> http://ffmpeg.org/mailman/listinfo/ffmpeg-user
>