Request for Linux help
@MadestMadness I haven't converted an image to a video with ffmpeg before, but this looks like it should work: https://stackoverflow.com/questions/24961127/how-to-create-a-video-from-images-with-ffmpeg#24966617
To split a video, you can use the -ss and -t flags. -ss specifies the time you want to start at, and -t is how long you want to grab after that time. So you could run ffmpeg -i inputfile.mp4 -ss 00:03:33 -t 00:00:30 outputfile.mp4 to cut the 30 seconds following 03:33 into a new file.