Icecast - Dec 2004 - Metadata and bad player behaviour : cut sound for short time when receiving metadata (kh versions of ices/icecast)

Hello,

I was trying to add metadata to my OGG stream (ices 2,0-kh59, icecast 
2.0-kh51).
It works... but the players are doing a small sound cut at metadata 
reception :
- VLC (maybe 1/3sec cut)
- JORBIS (java. maybe 1/10sec, because I can have set higher priority to 
sound processing and not to comment handling)
(player plateform: Mac OS X 1.3.6)

With VLC... I can say comments are unusable, it's too bad... Maybe if 
the comment change occurs between songs it not so noticeable, but that's 
not very good...
I didn't tried other players.

Did you experienced such problems? I didn't tried icecast 2.1-kh4 yet 
because the version I have is working fine.
Before changing to latest icecast, I would like to know if there is a 
similar trouble with it (I don't say it's an icecast issue, but maybe 
with newer ogg headers are handled correctly by players. Anyway, VLC is 
buggy regarding comments).

BTW, metadata are nicely streamed. I can feed ices with any metadata 
(anything=everything), the player receives it, even for streams 
transcoded by ices from the main stream.

Thanks for you comments,
Regards,
Chris

On Sun, 2004-12-12 at 21:57, Iceuse - Kris wrote:
> Hello,
> 
> I was trying to add metadata to my OGG stream (ices 2,0-kh59, icecast 
> 2.0-kh51).
> It works... but the players are doing a small sound cut at metadata 
> reception :
> - VLC (maybe 1/3sec cut)
> - JORBIS (java. maybe 1/10sec, because I can have set higher priority to 
> sound processing and not to comment handling)
> (player plateform: Mac OS X 1.3.6)
> 
> With VLC... I can say comments are unusable, it's too bad... Maybe if 
> the comment change occurs between songs it not so noticeable, but
that's
> not very good...
> I didn't tried other players.
I'm having weird effects with sound in vlc 0.8.1, it keeps speeding up
and slowing down. Does ogg123 have a similar issue.  A possible cause is
that when new headers are received the player may very well reset the
audio interface to the settings in the new header and this could cause
the cut.

For a test, try downloading the stream to file then play the file back.

I haven't used JORBIS myself
> Before changing to latest icecast, I would like to know if there is a 
> similar trouble with it (I don't say it's an icecast issue, but
maybe
> with newer ogg headers are handled correctly by players. Anyway, VLC is 
> buggy regarding comments).
some players are known to have problems with chained bitstreams, my vlc
seems ok with the chaining but screws up on sound output.

There hasn't been much change in the way ogg is handled in the later
releases of icecast-kh, the headers are still handled the same way.

karl.

>I'm having weird effects with sound in vlc 0.8.1, it keeps speeding up
>and slowing down. Does ogg123 have a similar issue.  A possible cause is
>that when new headers are received the player may very well reset the
>audio interface to the settings in the new header and this could cause
>the cut.
>
>  
>
I few month ago, I was using xmms (I can't set up X11 sound oc mac, so I 
can't use xmms any more), and I never noticed troubles with comments.
>For a test, try downloading the stream to file then play the file back.
>
>  
>
I'll test that.
>I haven't used JORBIS myself
>
>  
>
very nice tool. We can easilly build a beautifull java player around it.
>>Before changing to latest icecast, I would like to know if there is a 
>>similar trouble with it (I don't say it's an icecast issue, but
maybe
>>with newer ogg headers are handled correctly by players. Anyway, VLC is 
>>buggy regarding comments).
>>    
>>
>
>some players are known to have problems with chained bitstreams, my vlc
>seems ok with the chaining but screws up on sound output.
>  
>
I'll try to contact VLC team, because that's not nice at all. At least, 
they should ignore the comments, because they are not displaying them 
(just in a strange way in information window)


Regards,
Chris
>
>  
>