[Icecast-dev] MetaData Update for FLAC and OPUS

Philipp Schafft phschafft at de.loewenfelsen.net
Tue Aug 13 12:09:15 UTC 2019

Good afternoon,

On Tue, 2019-08-13 at 13:36 +0200, bn at radio42.com wrote:
> It seems, that with FLAC and OPUS streams (not individual files) the song title (meta data) updates do not work.
> Also the ICEcast admin web interface isn’t working for FLAC and OPUS; while it is working for MP3, AAC as well as OGG streams.
> I.e. when sending a continuous FLAC or OPUS stream to an ICEcast server, it seems impossible to update the meta data mid-stream (like it works for MP3, AAC or OGG).
> I also couldn’t find any way to tell the original FLAC or OPUS encoder to perform the meta data update mid-stream.

Then that is a limitation of the encoder. You should contact the vendor
of your encoder and ask them about it.

> Any suggestions?

See my reply here:

> Or are mid-stream meta-data updates simply not supported?

They are. And support is complete beside that they do not show up on the
status page for FLAC based streams. But they are passed to the listener

> If they support, I would be glad about any info on how to implement them.

You must tell your encoder to update the metadata. It's the encoder's
job to send them.

> If they are not supported, are there any plans to implement the admin meta data update interface also for FLAC and OPUS?

No. As metadata updates are already supported according to all relevant
standards. Anything else would be outside the standards and would likely
be more harm than good.

With best regards,

Philipp Schafft (CEO/Geschäftsführer) 
Telephon: +49.3535 490 17 92

Löwenfelsen UG (haftungsbeschränkt)     Registration number:
Bickinger Straße 21                     HRB 12308 CB
04916 Herzberg (Elster)                 VATIN/USt-ID:
Germany                                 DE305133015
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