Saving tags with mutagen

[Bernd Wechner]

I can't seem to find a good example anywhere in the docs, or on-line alas for this simple proforma:

import mutagen

AlbumArtist = "Somebody"   # An Album artist to write to the appropriate tag

 

mfile = mutagen.File(path)

filetype = type(mfile).__name__

                       

if filetype == "ASF":

# Save the Album Artist here ("WM/AlbumArtist")

# ... do something, what?

mfile.save()          

elif filetype == "MP3":

# Save the Album Artist here ("TPE2")

# ... do something, what?

mfile.save()          

elif filetype == "MP4":

# Save the Album Artist here ("aART")

# ... do something, what?

mfile.save()

I've been experimenting primarily with the TPE2 tage so far but have tried so many things and failed, it's not funny. So I'me wondering what the missing line of code  (or three missing lines of code) aught to look like?

I'd be greatly appreciative of any tips here, and don't mind adding what I learn to the (already kick-ass excellent) docs at readthedocs ;-).

Regards,

Bernd.

[Christoph Reiter]

Every format/interface is different. Here are some programs which
handle multiple formats using mutagen:

https://github.com/quodlibet/quodlibet/tree/master/quodlibet/quodlibet/formats
https://github.com/metabrainz/picard/tree/master/picard/formats
https://github.com/beetbox/beets/blob/master/beets/mediafile.py

The interface you are probably looking for does not exist, see
https://github.com/quodlibet/mutagen/issues/186

[Bernd Wechner]

OK, This works (only MP3 of the three formats I'm using seems to have a different call to set the tag). I wonder why?

import mutagen

path = "Some file or other"    # A file to set set the album artist

AlbumArtist = "Somebody"   # An Album artist to write to the appropriate tag

mfile = mutagen.File(path)

filetype = type(mfile).__name__

                       

if filetype == "ASF": tag = "WM/AlbumArtist"         mfile.tags[tag] = AlbumArtist         mfile.save()          

elif filetype == "MP3":
        tag = "TPE2"

        mfile.tags.setall(tag, [mutagen.id3.TPE2(3, [AlbumArtist])])
        mfile.save()          

elif filetype == "MP4":

        tag = "aART"         mfile.tags[tag] = AlbumArtist mfile.save()

Which brings me to another question:

How to find and remove duplicate tags.

It seems in MP3 files especially I'm seeing duplicate tags in some files. Here's what I see (and am not seeing clear documentation for):

import mutagen

          path = "Some file or other"    # A file to set set the album artist
          tag = "Some tag or other"      # For example "TPE1"

          mfile = mutagen.File(path)

filetype = type(mfile).__name__

if filetype == "MP3" and tag in mfile.tags:
    mtag = mfile.tags[tag]
    has_dupes = hasattr(mtag, "text") and isinstance(mtag.text, list) and len(mtag.text) > 1
    if has_dupes:
        print("Tag values:")
        for val in tags[tag].text:
            print(val)

The question is how to remove the duplicates thus found and moreover can duplicates be found in ASF and MP4 files too?  hasattr(mtag, "text") is false for those with filetype of ASF or MP4.

I'm not finding clear documentation of how duplicate tags are represented in each file type if at all.

Regards,

Bernd.

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