[FFmpeg-user] Delaying audio and video stream

[Roger Pack]

> I have a video file with one audio track already attached to it and its
> perfectly in sync with video. Then I have another audio track which I need
> to add to the video as second audio track. But this audio track is ahead of
> the audio/video stream so I need to delay it. When I use the following
> command

Maybe use sox to add some extra whitespace at the beginning?