I'm trying to write a filter that will automatically stretch the contrast of an input video.
The method I thought of is: 1) Separate the L, U and V channels. 2) Apply histeq to the L channel. 3) Recombine the channels. I'm new to ffmpeg, so I've been able to do 1 and 2, but not sure how to implement #3. What I have so far is: ffmpeg -i in.mkv -vf extractplanes=y,histeq=strength=0.3:intensity=1 out.mkv Which extracts the L channel and autocontrasts it, but I'm not sure how to recombine it with the U and V channels. Maybe use mergeplanes? Help! _______________________________________________ ffmpeg-user mailing list [email protected] http://ffmpeg.org/mailman/listinfo/ffmpeg-user
