On 7/31/17, Jon bae <jonba...@gmail.com> wrote: > 2017-07-31 10:30 GMT+02:00 Paul B Mahol <one...@gmail.com>: >> >>> >>> What exactly you tried? >>> >>> Perhaps you want premultiply filter? >>> >>> Yes I have a video and a lower third, and I want to overlay the lower >> third. But my alpha channel from the lower third is not pre-devided with >> the alpha channel, so I need to do a channel division in ffmpeg. >> Something like: >> >> ffmpeg -i video.mp4 -i lowerthird.png -filter_complex >> [1:v]geq=r=r/a:g=g/a:b=b/a[gq];[0:v][gq]overlay ... output.mp4 >> >> I see that you wrote a filter for this, but can you please give me an > example of how it works? I don't get it to run.
"I don't get it to run" means nothing to me. _______________________________________________ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
