Comments (4)
phw
commented on July 18, 2024
Pretty likely your file isn't a Ogg Opus file. If this indeed contains Opus encoded audio it's pretty likely that it is Matroska Opus, but Matroska containers are not yet supported by mutagen (see #3 and #396).
If you have ffmpeg installed, can you run ffprobe [filename] on the file? If the output says something like "Input #0, matroska" then it is a matroska file and unsupported. If it says "Input #0, ogg" it's supposed to work.
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phw
commented on July 18, 2024
The issue got discussed on IRC and it turned out that the reason this brole was that the files got ID3 tags added to them. The command in the issue description also shows that mid3v2 was used on the Ogg Opus file, which is not supposed to be done as Ogg Opus does not use ID3 tags.
Essentially this is not a bug. mid3v2 is not supposed to support Ogg tags, it is a direct replacement for id3v2 command. But a side effect seems to have been that mid3v2 added a ID3 tag block to the file. Not sure if this is inteded or should be prevented.
See the discussion at https://chatlogs.metabrainz.org/libera/musicbrainz/2023-03-27/?msg=5152125&page=2
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iconoclasthero
commented on July 18, 2024
I understood Mutagen to be what Picard uses to modify the tags on my .opus
files, I further expected that Mutagen did it for all of the files Picard
tags and that was apparently fallacious. I took "Mutagen is a Python
module to handle audio metadata. It supports ASF, FLAC, MP4, Monkey’s
Audio, MP3, Musepack, *Ogg Opus*, Ogg FLAC, Ogg Speex, Ogg Theora, Ogg
Vorbis," to mean that the CLI tool that does tagging tags all those files
including .opus files, you know, because that is what Picard uses to tag
files... I don't know if there's a way to make more clear what mid3v2 does
*not* do—of if it's moot since I'm the only one who would see it that way.
…On Mon, Apr 10, 2023 at 12:36 PM Philipp Wolfer ***@***.***> wrote:
The issue got discussed on IRC and it turned out that the reason this
brole was that the files got ID3 tags added to them. The command in the
issue description also shows that mid3v2 was used on the Ogg Opus file,
which is not supposed to be done as Ogg Opus does not use ID3 tags.
Essentially this is not a bug. mid3v2 is not supposed to support Ogg tags,
it is a direct replacement for id3v2 command. But a side effect seems to
have been that mid3v2 added a ID3 tag block to the file. Not sure if this
is inteded or should be prevented.
See the discussion at
https://chatlogs.metabrainz.org/libera/musicbrainz/2023-03-27/?msg=5152125&page=2
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Related Issues (20)
- Write into FLAC files via cli HOT 1
- File objects with no tags cast to boolean as false
- wav file bps incorrectly identified as absurdly high value HOT 3
- Unclear what the build system is HOT 5
- Mutagen updates ID3v1 tags but does not save ID3v2 tags HOT 4
- MP4.save() makes phone videos unreadable (Invalid NAL unit size)
- Having problems figuring out how to write to ID3 tags for MP3's HOT 3
- Updating APIC tag leads to empty cover art on Spotify's local files
- Performance on NFS-mounted files much helped by specifying buffering HOT 1
- mutagen-inspect shows tag data but mid3cp shows HOT 4
- OGG Vorbis file save fails: mutagen.ogg.error: unable to read full header; got b'\x00\x00' HOT 3
- Can't open wav ripped from DVD audio: Invalid Chunk - ordinal not in range(128) HOT 6
- OGG Vorbis: wrong (playback) duration / length reported on opus audio HOT 1
- "Universal" audio metadata class HOT 3
- Extensible wave format support HOT 2
- FLAC objects that compare equal do not have the same hash value
- Unable to add artwork to `.ogg` [vorbis] file HOT 9
- Add support for Audiobooks (.m4b) tags to EasyMP4
- Help with implementing ID3v3.2 spec in dart
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