There is a new pull request by bvdeenen against master on the void-packages repository

https://github.com/bvdeenen/void-packages master
https://github.com/void-linux/void-packages/pull/24615

mlt: update to 6.22.1
Tested with KdenLive, which now again has the transform option, which it lacked with the previous mlt version

A patch file from https://github.com/void-linux/void-packages/pull/24615.patch is attached