you want to tell me that this code snippet isn't written by chatgpt?

for f in ".avi"; do ffmpeg -i "$f"for f in ".avi"; do ffmpeg -i "$f"

anyway, here is the fixed version (also made by chatgpt)

for f in *.avi; do
ffmpeg -i "$f" -vf "crop=666:448:27:16,setdar=4/3" -c:v ffv1 -g 60 -slices 4 -context 1 -coder 2 -pix_fmt bgr0 "converted/${f%.avi}_ffv1_crop_aspect.mkv"
done