mkvpropedit batch track select by idiom

[chemba]

Hey guys, mkvpropedit is amazing for batch editing some headers such as default subtitle and subtitle id number, without needing to remux the whole thing, so it's very fast.

However, I noticed that batch editing can be problematic when the multiple files don't have a fixed usage of track id for subtitles (so sometimes a russian subtitle is track:2, in other file it's track:3 etc.).

So I was wondering if mkvpropedit can select a track based on other metadata, such as idiom set in the mkvinfo: rus, eng, ita etc.

This could enable us to batch edit a whole series with just one string, even though track ids change from file to file.

e.g. mkvpropedit -v "%%~A" -v --edit track:ENG --set flag-default=0 --edit track:ITA --set flag-default=1