Icecast - Aug 2019 - Meta Data for opus and FLAC do not work

Hi, 

I try to find out how to update the meta data on a flac or opus stream.

Look like its not support this formats. And update interface do not
work. 

Is there a solution to make this work?  

Best regards, 

Michel

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Good morning,

On Tue, 2019-08-13 at 09:25 +0200, Michel van Dop wrote:
> Hi, 
> 
> I try to find out how to update the meta data on a flac or opus stream.
Metadata is the domain of the encoder.

> Look like its not support this formats.

Opus metadata is fully supported. For FLAC metadata may not be displayed
on the status page but is still passed to the listener.

> And update interface do not work. 
That is *ONLY* for ICY (read: MP3 and AAC) streams as MP3 (and AAC) do
not support metadata.

However for every non-legacy formats such as all Ogg-based, all
Matroska-based, and FLAC metadata is supported by the format itself.
Icecast will happily relay any metadata updates send by the encoder.


> Is there a solution to make this work?  
Yes. Set the metadata in your encoder. See it's documentation on how to
do that.


With best regards,

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

Löwenfelsen UG (haftungsbeschränkt)     Registration number:
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On Tue, Aug 13, 2019 at 09:25:41AM +0200, Michel van Dop
wrote:
> I try to find out how to update the meta data on a flac or opus stream.
To expand on the other response.  If there is metadata in the FLAC or
Opus (Ogg) stream, Icecast will not modify it.
> Look like its not support this formats. And update interface do not
> work. 
Icecast's update interface is only implemented for MP3, AAC and
possibly Vorbis streams, as metadata updates for MP3 and AAC are not
possible except as out-of-band ICY updates.

(Yes, it's annoying that there is this inconsistency.)

In addition, many clients are not able to accept metadata updates as
part of the Ogg (FLAC, Vorbis, Opus) stream, expecting ICY metadata
only.

Also, some buggy clients consider a change of metadata in an Ogg
stream (which is usually accompanied by a change in stream serial
number) as being the end of streaming, and will stop playback on a
metadata change.

-- 
Paul Martin <pm at nowster.me.uk>

Hi Paul Martin, 

Thank you for the information. I send it to the developer of Playout
software of ProppFrexx on air. 

Best regards, 

Michel 

Paul Martin schreef op 2019-08-14 19:10:
> On Tue, Aug 13, 2019 at 09:25:41AM +0200, Michel van Dop wrote: 
> 
>> I try to find out how to update the meta data on a flac or opus stream.
> 
> To expand on the other response.  If there is metadata in the FLAC or
> Opus (Ogg) stream, Icecast will not modify it.
> 
>> Look like its not support this formats. And update interface do not
>> work.
> 
> Icecast's update interface is only implemented for MP3, AAC and
> possibly Vorbis streams, as metadata updates for MP3 and AAC are not
> possible except as out-of-band ICY updates.
> 
> (Yes, it's annoying that there is this inconsistency.)
> 
> In addition, many clients are not able to accept metadata updates as
> part of the Ogg (FLAC, Vorbis, Opus) stream, expecting ICY metadata
> only.
> 
> Also, some buggy clients consider a change of metadata in an Ogg
> stream (which is usually accompanied by a change in stream serial
> number) as being the end of streaming, and will stop playback on a
> metadata change.
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