Le Tuesday 04 November 2008 20:55:59 okay_awright, vous avez écrit :
> hello everyone,
Hi !
> Please bare with me, I'm a new user of the magnificent liquidsoap ;)
Woah, thanks :-)
> I've recently migrated to a recent SVN of liquidsoap, the latest one
> that doesn't encompass the video-related code (SVN #5946)
As there seems to be some concern about the addition of video into liquidsoap,
there should not be any performance or other thing with it.
In particular, the video channel is currently disabled by default in the
current svn, so video support shouldn't matter.
> and I have
> one question and one request for troubleshooting.
>
> First, I've updated my release of liquidsoap because I needed the
> 'auth' function callback in input.harbor. And this feature works
> really great. Thanks for that. However, I have one question: I need to
> rewrite the metadata of the stream from input.harbor with dynamic data
> (i.e. non-static, not hardcoded in the configuration file but
> retrieved from an external resource). I know the ANNOTATE
> functionality won't work because it can only be used along with URIs
> but it is exactly this kind of mechanism I would require: fetching
> external data from script outputs.
> Maybe I could use the 'auth' or 'on_connect' functions of input.harbor
> and store the global variables retrieved until I use rewrite_metadata
> for the stream. The problem is that I really don't know how to write
> that using the liquidsoap language. Any hint please? (and with a short
> example it would even be better)
I believe you need the map_metadata operator:
This operator provides a callback for rewriting metadata.
For instance:
def my_rewrite(metadata) =
(.. whatever you like ..)
end
source = map_metadata(my_rewrite,source)
Using this function, you may call any external script of your own, and use the
returned value for the new metadata.
The default behaviour of this function is to update only the returned fields.
For instance, if:
def my_rewrite(metadata) =
("title","dumb song")
end
Then only the title field will be updated. In case you want a complete
rewrite, you can use the "update" option. You may also remove empty metadata
by using the "strip" option.
Actually, rewrite_metadata is written using this function. The code is in
scripts/utils.liq in the source tarball, or in
${prefix}/liq/liquidsoap/${version}/utils.liq
> My second question is related to the observation of the odd behaviour
> of my new liquidsoap installed (put in production mind you, I do
> regret) compared to my old install (0.36SVN).
> Regularly, the stream completely shuts down after the end of a track.
> This happens quite often and this is really annoying because it goes
> up online only a few seconds afterwards.
> I believe it is either related to this build or to my conf file
> because the system remained unchanged and so the downstream server
> used to relay the stream (which is really reliable).
>
> Here is an excerpt from my logs, the disconnection appears at
> 19:31:11. It is always the same error repeated from one end to the
> other in my logs.
(...)
> Any help welcome, please.
The log seems to show that the deconnection is due to liquidsoap lag, as shown
in these lines:
> 2008/11/04 19:31:05 [generic queue #2:4] There are 1 ready tasks.
> 2008/11/04 19:31:05 [liqfm:4] Submiting Shina Williams & His African
> Percussionists -- Agboju Logun to lastfm
> 2008/11/04 19:31:05 [generic queue #1:4] There are 0 ready tasks.
> 2008/11/04 19:31:05 [non-blocking queue #2:4] There are 0 ready tasks.
> 2008/11/04 19:31:10 [root:2] We must catchup 4.99 seconds!
> 2008/11/04 19:31:11 [/:2] Shout socket error: timeout, network
> failure, server shutdown? Restarting the output in 6 seconds.
Liquidsoap lags, so the shout connection disconnect by timeout, and the source
gets restarted. Much likely, the lastfm submition induced some latency, as we
also noticed in our production server (running svn !).
The solution could then be to enable more queues. I see you already did it in
your script. Perhaps adding one or two more generic queues, but I am not
really sure about this, please let us known if it helps..
Romain
-------------------------------------------------------------------------
This SF.Net email is sponsored by the Moblin Your Move Developer's challenge
Build the coolest Linux based applications with Moblin SDK & win great prizes
Grand prize is a trip for two to an Open Source event anywhere in the world
http://moblin-contest.org/redirect.php?banner_id=100&url=/
_______________________________________________
Savonet-users mailing list
[email protected]
https://lists.sourceforge.net/lists/listinfo/savonet-users
