Correct Answer (ffprobe):
Metadata:
title : foreverrr
artist : mc chris
track : 9/12
album : mc chris foreverrr
disc : 2/2
genre : Hip-Hop
TMED : Digital Media
SCRIPT : Latn
originalyear : 2014
TSST : mc chris foreverrr, pt. 2
MusicBrainz Album Type: album
MusicBrainz Album Artist Id: 43e81abc-bd9c-4056-8c2d-6dfdf3902025
MusicBrainz Artist Id: 43e81abc-bd9c-4056-8c2d-6dfdf3902025
TSO2 : chris, mc
album_artist : mc chris
MusicBrainz Release Group Id: e3625144-0d25-43f4-97d5-fc7a9ee3b0e0
Artists : mc chris
MusicBrainz Release Track Id: c5faf819-4699-4bc1-95db-bbeb6a0d6ec7
TORY : 2014
artist-sort : chris, mc
MusicBrainz Album Status: official
MusicBrainz Album Id: 53629801-ec93-4871-b806-482e0715ae68
date : 2014
What mpv-rs returns (as a result of use-after-frees):
key:'forev', value:'foreverrr'
key:'mc chr', value:'mc chris'
key:'9/12', value:'9/12'
key:'album', value:'mc chris foreverrr'
key:'2/2', value:'2/2'
key:'Hip-H', value:'Hip-Hop'
key:'Digi', value:'Digital Media'
key:'LatnT', value:'Latn'
key:'2014nalyear', value:'2014'
key:'TSST', value:'mc chris foreverrr, pt. 2'
key:'MusicBrainz Album Type', value:'album'
key:'MusicBrainz Album Artist Id', value:'43e81abc-bd9c-4056-8c2d-6dfdf3902025'
key:'MusicBrainz Artist Id', value:'43e81abc-bd9c-4056-8c2d-6dfdf3902025'
key:'chri', value:'chris, mc'
key:'mc chrisist', value:'mc chris'
key:'MusicBrainz Release Group Id', value:'e3625144-0d25-43f4-97d5-fc7a9ee3b0e0'
key:'mc chri', value:'mc chris'
key:'MusicBrainz Release Track Id', value:'c5faf819-4699-4bc1-95db-bbeb6a0d6ec7'
key:'2014', value:'2014'
key:'chris, mct', value:'chris, mc'
key:'MusicBrainz Album Status', value:'official'
key:'MusicBrainz Album Id', value:'53629801-ec93-4871-b806-482e0715ae68'
key:'2014', value:'2014'