[FFmpeg-user] Alpha not working as expected with geq filter

Carl Eugen Hoyos cehoyos at ag.or.at
Tue May 21 19:44:56 CEST 2013

Paul B Mahol <onemda <at> gmail.com> writes:

> Add format filter before geq filter, like this: -vf format=rgba,geq.....

I suspect geq does not support rgba (it should work without the 
format filter if it did), format=gbrap (if that is the name of planar 
rgb alpha) should work.

This may be a bug, Carl Eugen

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