I'm trying to figure out with progressive audio speed/acceleration.
In this case, atempo won't work due to speed factor as number instead of expression.
While the asetpts doesn't work in combination with adelay.
1. audio1 - apply progressive PTS, eg: curveExpr * PTS; apply adelay
audio2 - unchanged
2. amix both audios together
3. concat resulted audio with video stream
The problem I'm facing is, that audio1 even after asetpts is still unchanged after adelay. I've tried to set atempo and it would work, but doesn't meet the requirement of acceleration then.
Any idea in there? Thank you
