General questions about OGG Vorbis

[pixel24]

Hi@all,

I have a few questions about OGG Vorbis. In another post about the DB correction value in the OGG Vorbis files, it was mentioned that support for OGG Vorbis will be implemented with version 10.9.

Does this mean that transcoding will be enforced when playing OGG Vorbis files?

My OGG Vorbis files were all digitized with a dynamic bitrate (min=256 max=512). Can Jellyfin handle this at all or does it use it?

with best
pixel24

[TheDreadPirate]

What post are you referencing? AFAIK, Jellyfin currently supports direct playing OGG Vorbis. The official CLIENTS currently request AAC when transcoding music. But some 3rd party clients (Symfonium) requests OGG Vorbis for music transcodes.

[pixel24]

I seem to remember that the post was on reddit or github. I can no longer say exactly :-(

The post was about the fact that Jellyfin does not take into account the DB correction value in my OGG files to adjust the volume.

I was told that the implementation of OGG-Vorbis will be introduced with version 10.9. Maybe I misunderstood and it only referred to the volume adjustment.

Yes, I use the official client (Android / Linux PC) because I have not found an opensource player that supports all functions.

[TheDreadPirate]

I think I have some OGG/Vorbis music, but I don't recall ever playing it since moving to JF. I will look for that music and try playing it in the official clients and Finamp (FOSS music player).

[pixel24]

If there is a possibility to upload files somewhere I can provide you with OGG-Vorbis files

[TheDreadPirate]

If you have Google Drive you can send me a PM with a download link.

[TheDreadPirate]

I had a single oldies radio show in OGG/Vorbis (in a Book library so treated like an audiobook).

It plays fine, no issues, can skip around, etc.

Can you find and share the post you talked about in the original post about some correction regarding OGG/Vorbis.

[pixel24]

I think I expressed myself badly. Playing the OGG Vorbis files works.

I couldn't find the old post but it was basically about applying vorbisgain to all files to write a DB correction value to the file header.This correction value is used by players such as VLC to play the songs at a consistent volume.

I have put together a few files from my collection to make it clear.

Code:

vorbisgain -d *.ogg

Analyzing files...

  Gain  |  Peak  | Scale | New Peak | Track
----------+--------+-------+----------+------
+4.64 dB |  15044 |  1.71 |    25667 | Anne Clark - Shades.ogg
+3.55 dB |  15729 |  1.50 |    23670 | Anne Clark - The Power Game.ogg
-8.87 dB |  33467 |  0.36 |    12053 | Clawfinger - Don't Get Me Wrong.ogg
-10.30 dB |  31350 |  0.31 |    9577 | Eminem - Like Toy Soldiers.ogg
+7.13 dB |  11617 |  2.27 |    26399 | Suzanne Vega - Tom’s Diner (Reprise).ogg
-8.00 dB |  33006 |  0.40 |    13140 | The Crash - Polar.ogg

This correction value is contained in the files. When I open the files with Music Brainz Picard, I see these values.

I have combined these files in the list in VLC so that loud and quiet songs are played alternately.

VLC evaluates this value and adjusts the volume. I then inserted the songs in Jellyfin (same files) in the same order in a new playlist. I have extreme differences in the volume during playback.

In the article at the time, it was written that the support of the DB correction value from the OGG Vorbis files will be introduced with version 10.9.

[tmsrxzar]

https://features.jellyfin.org/posts/2363...malization

[pixel24]

Yes, exactly. That was the contribution :-)

In this context, I still have questions.

If I have understood everything correctly, when I use the official apps (Linux desktop and Android), a conversion of the OGG -> AAC format takes place. Recoding always means a loss of quality. Or does it?

I like OGG-Vorbis because it is an open format and is also qualitatively better than MP3 in some respects. Will Jellyfin fully support this at some point?

Another question in this context is the support of dynamic bit rates. When creating OGG files, I select -m 256 -M 512 as the lower and upper limit. Does Jellyfin process at all when streaming to the client?