I have this audio filterchain (for repetitive short part of the original audio):
[1:a] atrim=start=2.52:end=1:38.0, aloop=100:7700 [audio]
When I used it without video, i. e. in the
ffmpeg command I mapped only audio:
then it fulfilled my intent - it started playing immediately (from
But when I mapped video, too
-map 0:v -map "[audio]"
then the audio started at
2.52 - the same value as in my
(I tried changing this value and the starting time changed appropriately, too.)
What is the reason for it and how I can fix it?