reading/writing non-default file tags?

[presentday-presenttime]

I am using some existing tags, that aren't natively supported by beets (from picard, Mp3tag, or wherever). I want to be able to read/write them using beets. is there a way to do this?

using the modify command afaik doesn't actually write to the file unless it's one of the already supported tags.

I've tried using the inline plugin with mutagen but it's slow, and I couldn't figure out how to support writing.

[Serene-Arc]

Beets doesn't really support arbitrary metadata fields out of the box. You'd need a plugin for that. What specific tags do you mean?

[presentday-presenttime]

rating and series are ones I use often that I handle outside of beets. at one point I was looking at mood & some I can't think of right now.

Mostly I was just wondering if there was a more straightforward way than having to write a plugin.

[Serene-Arc]

AFAIK there isn't, there would need to be fields defined somewhere, which is usually through a plugin. I think that's the usual way to define flexible fields, which would be what you'd use.

@snejus are you aware of a way to do this without a plugin?

[snejus]

You're right @Serene-Arc, we don't have a plugin that allows writing custom media fields. @presentday-presenttime, see this GitHub code search for the relevant function that should be used to set custom media fields. There are a couple of plugins that do this, so they may serve as a starting point for you if you'd like to go ahead and code this