Re: mp3 playback from URL

Am 21. November 2024 10:55:37 MEZ schrieb [email protected]:
>Hey all
>
>I've been running two Icecast2 streams for a few years that are fed by
>a Pd patch. Those patches use [readanysf~] to playback MP3 and other
>audio media, partially from URL. The result is sent through [mp3cast~]
>to an Icecast2 server. 
>
>Since a few weeks, the patch segfaults after a few hours/days of
>running.

Urgh. That will make debugging hard...


> This is the backtrace (not much useful info, libraries from
>Debian seem not compiled with debug symbols):

They are compiled *with* debug symbols, but thesr are not shipped in the "normal" packages (to keep them nice and small).
See <https://wiki.debian.org/HowToGetABacktrace> on how to install the debug symbols for a given package.


>which indicates  the problem is in the [readanysf~] playback and not in
>Pd or [mp3cast~].

Well if it happens only every few days, things might be related to thread and/or memory management, which means that the cause of the problem could be *anywhere*.
But if course the backtrace is where I would start looking as well.

>
>I plan to run those streams for some more years and am looking for a
>sustainable way to play back the audio files. Thus, I'm evaluating
>possible options:
>
>* Fix [readanysf~] (if the problem is in readanysf~ and not in a
>  library)
>
>* Switch to [mp3amp~] from unauthorized. However, it doesn't compile
>  with current libmpg123

I think it was just today that somebody on irc mentioned that they would not recommend using "unauthorized".


>
>cannot compile the original sources). What does it mean for the future
>of the object that the external doesn't have an upstream maintainer?

That it should be moved to the "pd-externals" repository so people *can* give it some love in a discoverable place.


>
>Before those issues arose, the streams have been running for years with
>minimal maintenance effort. That really speaks for Pd's quality and
>careful development practices. I can't quite figure out what changed in
>the system. I upgraded the server to Debian bookworm last year, but
>experience the issues only since a few weeks.

There was a bookworm point release last week, maybe this is related (in case you do regular security upgrades).
Check the apt and dpkg logs...


mfg.sfg.jfd
IOhannes
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