Hi, I've written & released some mpv-scripts for YouTube, mp4, mp3, jpeg etc. They work with SMPlayer & mpv.
https://github.com/TinosNitso/mpv-scriptsYou can extract them all from the latest release mpv-scripts.zip & then enter --script=directory in SMPlayer preferences.
aspeed.lua lets you randomize mono recordings so they are surround sound (can connect up many little stereos, like a robo-choir). It stays in sync for 10 hours! autocomplex.lua has animated spectrum overlay. automask.lua merges animated mask on top of video, with any filterchain. autocrop.lua crops off black bars. Check it out!
Unfortunately my passport's about to expire so the next update will take ages. The main update it needs is autocrop has to have a track list with start & end times (so it crops both time & space). autocomplex needs alpha (transparency) detection. automask needs smooth (faded) toggle. aspeed needs better triggering & reliability. It just takes ages to get the codes exactly right! I've fixed many technical warnings.