This is sort of a followup to my post about Winamp visualization recording. This companion script can take those recorded videos and loop them seamlessly.
Here’s the gist:
Basically, the script just makes 2 copies of the video file, and merges them at midpoint with a transition.
As noted in the gist, MLT is required, it’s totally free. And better yet, you can easily install Shotcut and it’ll use the MLT file included with that.