It’s not about when to stop the recording.
It’s about how to have the visuals in sync with the music.
When in my visual a door slams, it must be met exactly the door sound in the Audio MP3.
It works when I play the Sketch, but the recording is way off.
Remark
I also read this: Movie Maker: Time gap between movie and its audio file - #2 by glv
Thank you for this.
But we don’t achieve a sync between MP3-file and visual in the resulting movie. I tried hamoid library and your approach with the Tool Movie Maker (installing ffmpeg manually). Nothing works.
I also read this: https://superuser.com/questions/982342/in-ffmpeg-how-to-delay-only-the-audio-of-a-mp4-video-without-converting-the-au
(Addition: I just realized that this discussion might in fact be helpful, with the ffmpeg parameter -itsoffset)
Maybe this is the problem.
Not solved.