[FFmpeg-user] how to use alpha channel to make transparent effect

qw applemax82 at 163.com
Fri Jun 26 09:39:06 CEST 2015


Hi
I use the below command to place one image on one video:ffmpeg -i ./file1.mp4 -i ./file2.jpg -filter_complex overlay ./file3.mp4

But there is no transparent effect in resulting file, i.e. file3.mp4. What is the command to use alpha channel to make transparent effect?


Thanks!


B.R.


Andrew


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