Timelapse Videos

Failed to make thumbnail for ./allsky-20230410.mp4 after 2 attempts.
Last command: ffmpeg -loglevel warning -ss 00:00:00 -i './allsky-20230410.mp4' -filter:v scale='100:-1' -frames:v 1 './thumbnails/allsky-20230410.jpg' 2>&1
Output from command: [NULL @ 0x2c5aae80] Unable to find a suitable output format for './thumbnails/allsky-20230410.jpg'