IVF file format support (was: ~~Animated AVIF file not recognized (ftyp box)~~)
Original bug: https://github.com/jurplel/qView/issues/534
GIMP 2.10.34
Error: Loading HEIF image failed: Invalid input: No 'ftyp' box VLC and mplayer play it perfectly. The animation should cycle through indefinitely like a gif.
