[FFmpeg-user] hue filter set brightness broken?

Karl Kiniger karl.kiniger at med.ge.com
Mon Oct 13 15:01:06 CEST 2014

Dear list,

-vf hue=b=-10 does not result in black images depending
on colors. 

Is this expected behavior?

I tried to use the hue filter in combo with sendcmd to 
simulate fade in and out but failed miserably.

a2z=($(echo {a..z}))
for i in $(seq -10 10);do
     fn=$(printf "huetest-%c-%d.png" $t $i)
     ffmpeg -f lavfi -i testsrc -an -vf hue=b=$i -frames 1 -y $fn


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