flac dev - Aug 2019 - Mid-Stream Meta Data Updates for ICEcast

I am streaming a FLAC OGG stream to an ICEcast server (a continuous/endless
stream) using the standard FLAC command-line encoder (capturing STDOUT).

 

It seems, that with FLAC streams the song title (meta data) updates do not work.

Also the ICEcast admin web interface isn’t working for FLAC; while it is working
for MP3, AAC as well as OGG streams.

I.e. when sending a continuous FLAC stream to an ICEcast server, it seems
impossible to update the meta data mid-stream.

 

I was asking the ICEcast developers for a solution, but they keep giving me the
following answer:

“You should contact the vendor of your encoder and ask them about it. Mid-Stream
meta-data updates are supported by ICEcast. 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 correctly”

 

As such, I am now asking you on how to implement mid-stream meta-data updates
with the FLAC encoder?!

So far I couldn’t find any options in the FLAC encoder nor the FLAC specs – as
such I am wondering, what the ICEcast developers have implemented.

Or is there a way to tell the encoder mid-stream, that the meta-data (e.g. song
title and artist) has changed?

 

Many Thanks,

Bernd

 

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Any News to this question?

 

The clear answer from the ICEcast developers is, that the only proper way to
update meta-data (out-of-band) on a continuous/endless ICEcast stream when using
any OGG based format (i.e. OGG, FLAC or Opus) is by providing multiple chained
streams – one for each logical track change.

 

The odd situation is now, that the standard reference encoders as provided by
xiph.org (i.e. this FLAC encoder) doesn’t support this out-of-the box.

 

As such, the ICEcast developers and others do recommend to make the modification
the client/encoder side.

You can read the full post/issue here:

 <http://lists.xiph.org/pipermail/icecast-dev/2019-August/002701.html>
http://lists.xiph.org/pipermail/icecast-dev/2019-August/002701.html

 

Any chance to get an meta-data update interface for automatic chained channels
on the encoder side implemented?

 

Regards,

Bernd

 

 

Von: flac-dev <flac-dev-bounces at xiph.org> Im Auftrag von bn at
radio42.com
Gesendet: Dienstag, 13. August 2019 14:40
An: flac-dev at xiph.org
Betreff: [flac-dev] Mid-Stream Meta Data Updates for ICEcast

 

I am streaming a FLAC OGG stream to an ICEcast server (a continuous/endless
stream) using the standard FLAC command-line encoder (capturing STDOUT).

 

It seems, that with FLAC streams the song title (meta data) updates do not work.

Also the ICEcast admin web interface isn’t working for FLAC; while it is working
for MP3, AAC as well as OGG streams.

I.e. when sending a continuous FLAC stream to an ICEcast server, it seems
impossible to update the meta data mid-stream.

 

I was asking the ICEcast developers for a solution, but they keep giving me the
following answer:

“You should contact the vendor of your encoder and ask them about it. Mid-Stream
meta-data updates are supported by ICEcast. 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 correctly”

 

As such, I am now asking you on how to implement mid-stream meta-data updates
with the FLAC encoder?!

So far I couldn’t find any options in the FLAC encoder nor the FLAC specs – as
such I am wondering, what the ICEcast developers have implemented.

Or is there a way to tell the encoder mid-stream, that the meta-data (e.g. song
title and artist) has changed?

 

Many Thanks,

Bernd

 

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bn at radio42.com wrote:
> Any News to this question?
I don't even fully understand the issue.
> Any chance to get an meta-data update interface for automatic chained
> channels on the encoder side implemented?
Clean patches to add this accepted.

Erik
-- 
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Erik de Castro Lopo
http://www.mega-nerd.com/