There is an updated pull request by bvdeenen against master on the void-packages repository

https://github.com/bvdeenen/void-packages-1 master
https://github.com/void-linux/void-packages/pull/24545

melt 6.22.1
patches removed, version updated, nothing else. Verified to work with
Kdenlive.

I made the patch because the "crop and transform -> Transform" effect was missing in KdenLive. I've installed `mlt` with xi and then was able to do a transform on a video without any other issues.

A patch file from https://github.com/void-linux/void-packages/pull/24545.patch is attached