Thunar 4.16.1 - no thumbnail display with opus or vorbis with covert art pic in mkv
1/ Put test files into some directory, for example TEST
2/ Open Thunar 4.16.1
3/ View in icons mode this test directory.
4/ notice there are no image thumbnails for files in opus or vorbis coded (ffmpeg encoded), but well with aac
Container: MKV Seems to be OK with webM container.