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

[Carl Eugen Hoyos]

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