If you need to watch two videos simulaneously, so that you can extract clips of interesting parts from it, then this tool is for you.
- mpv You can get a binary for your distro from the official website. Alternatively, you can also install it directly using your distro's package manager, if available
- ffmpeg Needed if you also want to extract clips instead of just writing the timestamps to a file.
# Arch
pacman -S mpv ffmpeg
# Ubuntu
apt-get install mpv ffmpeg
Just clone the repository to get a copy.
Start the clipper by providing the paths to the two videos.
./clipper <path_to_video1> <path_to_video2>
An mpv instance should launch, which will playback both videos in a synchronized fashion. To clip, the bindings are ; (start/reset start) and ' (stop/reset stop).
When you're done, simply exit out of the player (q), and ffmpeg will begin to encode the clips into files.