Set dither=none for static backgrounds

gifgen

@@ -25,6 +25,7 @@ palette="/tmp/gif-palette-$pid.png"
 fps="10"
 verbosity="warning"
 stats_mode="full"
+dither="sierra2_4a"
 
 # Parse args
 while getopts "hi:o:f:sv" opt; do
@@ -43,6 +44,7 @@ while getopts "hi:o:f:sv" opt; do
       ;;
     s)
       stats_mode="diff"
+      dither="none"
       ;;
     v)
       verbosity="info"
@@ -70,5 +72,5 @@ echo "Generating palette..."
 ffmpeg -v $verbosity -i $input -vf "fps=$fps,palettegen=stats_mode=$stats_mode" -y $palette
 [[ "$verbosity" = "info" ]] && echo
 echo "Encoding GIF..."
-ffmpeg -v $verbosity -i $input -i $palette -lavfi "fps=$fps [x]; [x][1:v] paletteuse" -y $output
+ffmpeg -v $verbosity -i $input -i $palette -lavfi "fps=$fps [x]; [x][1:v] paletteuse=dither=$dither" -y $output
 echo "Done!"