[Icecast-dev] OPUS/FLAC Metadata

[Marvin Scholz]

On 16 Jun 2017, at 5:41, Rick Keniuk wrote:

> Is this the HTTP call for injecting the “song” metadata?
> This is a capture (using RawCap in conjunction with Wireshark) of my 
> AAC+ stream metadata input to IceCast that works fine.
>
> GET 
> /admin/metadata?mode=updinfo&mount=%2FFVHradio_AAC&song=Fox%20Valley%20Hit%20radio%20-%20Hits%20from%20the%20Valley 
> HTTP/1.0
> User-Agent: RadioBOSS
> Authorization: Basic
>
> The same input to IceCast capture for OPUS that does not work.
>
> GET 
> /admin/metadata?mode=updinfo&mount=%2FFVHradio_OPUS&song=Mike%20%26%20The%20Mechanics%20-%20The%20Living%20Years 
> HTTP/1.0
> User-Agent: RadioBOSS
> Authorization: Basic
>
> This it the output of my encoder which is DJsoft’s RadioCaster 
> v2.5.0.0
>
> I think Marvin Scholz indicated that OPUS and FLAC do this differently 
> but that makes it confusing for the encoder people.

This endpoint is for legacy streams like MP3 and AAC.
While it might work with other formats, it should NOT be used. It does 
not matter if the source client or you use it through
the web interface. Both you and the source client should not use this 
for anything else than MP3 and AAC or other unsupported
formats.

The source client is supposed to encode the metadata into the stream, 
not use any endpoint whatsoever to send them, for Ogg and
other supported formats. There is nothing confusing about this. The 
reason this is different for MP3 and AAC is, that it is simply
impossible to do that for these formats, which is why the endpoint you 
mentioned exists. Kind of a hack to workaround the limitations
of the formats.

Note that FLAC metadata support is right now not fully working, Icecast 
will not display them in the Web interface, afaik, but the
metadata should appear fine on the listener clients if they support it.

>
> Sorry…  I’m a noob at this so I may be explaining this 
> incorrectly.
>
> Rick
>
>> On Jun 15, 2017, at 10:51 AM, Romain Beauxis <toots at rastageeks.org> 
>> wrote:
>>
>> Hi all,
>>
>> 2017-06-13 9:33 GMT-05:00 Philipp Schafft 
>> <phschafft at de.loewenfelsen.net 
>> <mailto:phschafft at de.loewenfelsen.net>>:
>>>
>>> Good afternoon,
>>>
>>>
>>> On Mon, 2017-06-12 at 13:20 -0500, Rick Keniuk wrote:
>>>> Marvin,
>>>>
>>>> That is the current version being used and it still has no meta 
>>>> data.
>>>> server_id     Icecast 2.4.99.1
>>>
>>> Icecast2 2.5 beta releases use 2.4.99.x as version number. So that 
>>> is
>>> correct.
>>>
>>>
>>>> Testing the metadata from the admin page “Update Metadata” 
>>>> results in the response:
>>>>
>>>> Message: Mountpoint will not accept URL updates
>>>> Return Code: 1
>>>>
>>>> So I would guess it isn’t functioning yet.
>>>
>>> The metadata update interface is only for MP3 and AAC as they do not
>>> have native metadata support. Generally speaking the metadata is in 
>>> the
>>> domain of the source client. So the source client needs to send 
>>> them.
>>
>> Not sure if that was an intended feature but I'm pretty sure that
>> metadata update through HTTP calls also works for ogg/vorbis in
>> icecast or at least did at some point.
>>
>> Romain
>
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