TFA claims:

> This is shorter than the ffprobe code, and faster too – testing locally, this is about 3.5× faster than spawning an ffprobe process per file.

And the calls to the MediaInfo wrapper are not really harder to parallelize. `subprocess.check_output` is synchronous, so that code would have to be adapted to spawn in a loop and then collect the results in a queue or something. With the wrapper you basically end up doing the same thing, but with `multiprocessing` instead. And you can then just reuse a few worker processes for the entire job.