From time to time i'm converting mkv to mp4 using ffmpeg in order to save disk space.
Currently i noticed that in some files multiple mjpeg streams where also included. Some of them were named
From the name
cover.jpg i assume that it is supposed to be displayed in some cases?!? But i never heard or saw that any program, eg. vlc, used an image to display anything from the video. So what is the use case of including pictures in a video file?
The files have one
normal video stream, maybe multiple audio streams, and about 4 mjpeg streams.