[FFmpeg-user] removing audio from section of video

[Lou]

On Mon, 21 Jan 2013 16:33:35 -0800
johnd <john at jjdev.com> wrote:

> this looks great but I can't figure out how to set more
> than one event
> 
> How do I pass more stuff like 'turn back on at a time'
> 
> 
> I tried this: 
> ffmpeg -y  -i withsound.mp4  -c:v copy -af "afade=t=out:st=2,afade=t=in:st=5"   done.mp4
> 
> but my end video was all silent
> 
> 
> I'd like to be able to tell it to turn off audio then back, then repeat
> that process...

My mistake. I assumed that it would allow you to fade out and then in,
but since the first filter mutes the audio the second filter in the
filterchain has no audio to fade in with; however it would be possible
to do the opposite with this method.