glitchGIF

#!/bin/bash
#
# Relies on Imagemagick + sed 
# (and a being run in folder full of .png images)
# does not currently check input file type,
# so don't feed it non-images, please 
# Imagemagick handles the file format conversion and saturation
#
for i in $( ls );
do
    echo source file: $i;
    filename=$(echo $i | sed s/\\.[a-z]*$/.bmp/);
    convert -quiet -modulate 100,420,100 $i $filename   # up saturation, png->bmp
    echo converted to: $filename    
done

mkdir JPGs BMPs
mv *.bmp BMPs/
cd BMPs

count=1
seed=$RANDOM
echo seed: $seed
for file in $( ls *.bmp ); 
do
    echo Performing substitutions on "$count".bmp ...
    sed "200,8800 s/44/$RANDOM/g" $file > "$count"a.bmp
    sed '666,6400 s/66/666/g' "$count"a.bmp > "$count"b.bmp
    sed '420,4200 s/42/420blazeit/g' "$count"b.bmp > "$count"c.bmp
    sed "3600,$ s/88/$RANDOM/g" "$count"c.bmp > "$count"d.bmp
    sed '225,$ s/xx//g' "$count"d.bmp > "$count"e.bmp
    sed "220,$ s/55/"$seed"/g" "$count"e.bmp > "$count"f.bmp
    sed "150,$ s/99/"$seed"/g" "$count"f.bmp > "$count"g.bmp
    sed '125,$ s/77//g' "$count"g.bmp > "$count"h.bmp
    sed '240,$ s/99//g' "$count"h.bmp > "$count".bmp
    #convert -quiet -modulate 100,142,100 "$count".bmp ../JPGs/"$count".jpg # bmp->jpg
    rm $file
    count=$((count + 1))
done

cd ..
#rm -rf BMPs

echo
echo converting JPGs to GIF... \(this might take a while\) 
#convert -delay 8 JPGs/*.jpg final.gif     # make a GIF!
convert -delay 2 BMPs/*.bmp final.gif     # make a GIF!
echo 
echo Finished!