[FFmpeg-user] alpha channel "overlay" or "movie"

Nicolas George nicolas.george at normalesup.org
Mon Aug 6 21:03:35 CEST 2012

Le decadi 20 thermidor, an CCXX, angelfilo at gmail.com a écrit :
> I'm trying to overlay a video with a second video containing alpha
> channel. like this:
> ffmpeg -i video1.mov -i video2.mov  -filter_complex "scale=512:304,overlay=0:0" video_result.mov
> the result contains both video1 and video2 but the background of the
> video2 (which contains alpha channel) is black.

Please post the complete console output so we can see more precisely what is
happening. Adding "-loglevel verbose" would be a good idea.

> I also tried to use the movie filter like:

In this case, this is more or less equivalent.


  Nicolas George
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: application/pgp-signature
Size: 198 bytes
Desc: Digital signature
URL: <http://ffmpeg.org/pipermail/ffmpeg-user/attachments/20120806/858d9902/attachment.asc>

More information about the ffmpeg-user mailing list