[FFmpeg-user] hue filter set brightness broken?

[Karl Kiniger]

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.

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

Karl