[Bug] Cannot import music managed/converted by beets to OGG/Vorbis format

[RTheren]

SailfishOS VERSION (Settings → About product → Build): 4.5.0.25

HARDWARE (Settings → About product → Manufacturer & Product name): Volla Phone 22

FlowPlayer VERSION (FlowPlayer → [Top pulley] Settings → [Top pulley] About): 0.3.5

BUG DESCRIPTION

I am unable to import my .ogg music that I manage and convert with beets program on PC. Tapping on "Update collection" after selecting the Music folder gives me this in journalctl:

May 28 12:58:25 Volla22 flowplayer[14716]: [D] unknown:0 - PROCESSING FILE: "/home/defaultuser/Music/Alestorm/No Grave but the Sea/01 - No Grave but the Sea.ogg" "INVALID TAG"
May 28 12:58:25 Volla22 lipstick[2903]: TagLib: Vorbis::File::read() - Could not find the Vorbis comment header.
May 28 12:58:25 Volla22 flowplayer[14716]: [D] unknown:0 - PROCESSING FILE: "/home/defaultuser/Music/Alestorm/No Grave but the Sea/05 - Bar ünd Imbiss.ogg" "INVALID TAG"
May 28 12:58:26 Volla22 lipstick[2903]: TagLib: Vorbis::File::read() - Could not find the Vorbis comment header.
May 28 12:58:26 Volla22 flowplayer[14716]: [D] unknown:0 - PROCESSING FILE: "/home/defaultuser/Music/Alestorm/No Grave but the Sea/03 - To the End of the World.ogg" "INVALID TAG"

STEPS TO REPRODUCE

1. Setup conversion format for beets like so:

    formats:
      opus: 
        command: ffmpeg -i $source -y -vn -acodec libopus -ab 96k $dest
        extension: ogg

2. Copy music to phone
3. Try to import

ADDITIONAL INFORMATION

Beets uses MusicBrainz for backend for filling in tags. Sometimes I update the albums manually with MusicBrainz Picard, but that doesn't seem to change the outcome. I can upload some ogg files here for further investigation.
Including output from ffprobe from one of the affected files:
ffprobe.txt

[Olf0]

@rubdos, any interest to take a look at this, when you can spare some time?

[rubdos]

FWIW, I'm using .opus files with Beets. You seem to be using Ogg/Opus though, not Ogg/Vorbis, so probably that needs changing in the issue title.

I would say that Meta::getFileByMimeType and DataReader::getFileByMimeType need a patch to distinguish Ogg Vorbis from Ogg Opus based on the file content.

As a workaround, @RTheren, you can change your beets config to use the .opus file extension.

[RTheren]

Tried it on a single file, and yeah changing to opus does seem to make it appear in the player. The .ogg might have been left from when I had the Vorbis before changing to Opus without changing the extension. So far, only FlowPlayer has complained about this. Thanks for the fix :)

[rubdos]

So far, only FlowPlayer has complained about this.

Yeh, because FlowPlayer makes a wrong assumption :-D