- ffmpeg -i "$new_filename" -s 122x69 -f image2 "$new_filename1"
- ffmpeg -i "$new_filename" -s 149x84 -f image2 "$new_filename2"
+ if [ ! -e "$new_filename1" ]; then
+ ffmpeg -i "$new_filename" -s 122x69 -f image2 "$new_filename1"
+ fi
+ if [ ! -e "$new_filename2" ]; then
+ ffmpeg -i "$new_filename" -s 149x84 -f image2 "$new_filename2"
+ fi