I'm trying to do a simple fade-in (audio and video) at the beginning
and fade-out at the end of a video clip. According to numerous
examples, I thought this should do it:
melt \
colour:black out=100 \
infile.mp4 \
-mix 100 -mixer luma -mixer mix:-1 \
colour:black out=100 \
-mix 100 -mixer luma -mixer mix:-1 \
-consumer avformat:outfile.mp4 acodec=aac vcodec=libx264
But the audio dosn't fade in or out. It comes on full volume at the
start of the output and stays full volume until the output ends. I get
the exact same results with or without the "-mixer mix:-1" options.
I've also tried setting start and end values for the "-mixer mix" and
that also had no effect.
What am I doing wrong?
How do you fade both audio and video?
--
Grant Edwards
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