vlc playback of shoutcast stream is chirpy

[Simon IJskes]

Binary package hint: vlc

When playing a shoutcast stream the sound is chirpy.

running:
vlc 'http://yp.shoutcast.com/sbin/tunein-station.pls?id=9907'

produces:
mdb:224, lastbuf:0 skipping granule 0
mdb:224, lastbuf:0 skipping granule 0
mdb:224, lastbuf:0 skipping granule 1
mdb:327, lastbuf:0 skipping granule 0
mdb:327, lastbuf:0 skipping granule 0
mdb:327, lastbuf:0 skipping granule 1
mdb:369, lastbuf:330 skipping granule 0
mdb:382, lastbuf:357 skipping granule 0
bits_left=-3
mdb:399, lastbuf:390 skipping granule 0

at the time of the chirp.

Description: Ubuntu 8.10
Release: 8.10

vlc:
  Installed: 0.9.4-1ubuntu3

[KenSentMe (jeroen-vandenieuwenhof)]

I'm also running 8.10, but after running

vlc 'http://yp.shoutcast.com/sbin/tunein-station.pls?id=9907'

All sounds fine. No chirps after one minute of listening. I also don't get the terminal messages you get.

[Simon IJskes (sim-nyx)]

KenSentMe wrote:
> I'm also running 8.10, but after running
>
> vlc 'http://yp.shoutcast.com/sbin/tunein-station.pls?id=9907'
>
> All sounds fine. No chirps after one minute of listening. I also don't
> get the terminal messages you get.
>

Also running amd64 ?

Gr. Sim

[Simon IJskes (sim-nyx)]

OK, decommisioned squid proxy and it works without a chirp.

Any suggestions? It is a bit to easy to point the finger directly at squid.

The more because it now says:

[00000445] access_http access: Raw-audio server found, mp3 demuxer selected

[Simon IJskes (sim-nyx)]

squid is running on hardy x32 server.

[Simon IJskes (sim-nyx)]

if http_proxy env var is unset, and http_proxy setting is used, same effect. chirps.

[Simon IJskes (sim-nyx)]

as you can see from the previous logs, the connection direct is demuxed with as demux='mp3' , the connection over the proxy is demuxed as demux='avformat'.

A guess would be that the ICY metadata is still in the stream fed to the avformat demux.

[Simon IJskes (sim-nyx)]

Quick and very dirty fix on http://linux.qcg.nl/node/46

[Xtophe (xtophe)]

What's bother me with this solution is that it implies that squid is transforming the Icy-MetaData into Xcy-MetaData. so it's not really a "transparent" proxy

Now, if it's a standardize behaviour common to all proxies, we cold change the code in access/http.c to look for both. But if it's just some peculiar behaviour of squid, it is squid which needs fixing

[Simon IJskes (sim-nyx)]

It is not a true fix. The change makes sure that VLC does not request the Icy-Metadata.

This is to make sure the streaming server replies without Icy-metadata. Because if it does, the proxy changes the ICY 200 OK response into HTTP/1.1 200 OK.

VLC thinks it is not an ICY stream, but the server does. The server muxes icy-metadat into the stream, vlc does not demux this metadata and feeds it directly to the mp3 decoder. mp3 decoder chirps and gets confused.

[Simon IJskes (sim-nyx)]

After a discussion on IRC it was fixed by 'nefrir', it will probably be fixed in vlc 0.9.7

[Reinhard Tartler (siretart)]

jaunty ships 0.9.9a