Re: GStreamer buffer memory pointer

[Torsten Schoenfeld <kaffeetisch gmx de>]

On 27.09.2012 14:48, vividsnow wrote:
> Also there are warnings in this code
> http://pastie.org/private/9fjpfheqfenbue36hm4ya:
> *** GPerl asked to invoke callback from a foreign thread; handing it
> over to the main loop
> What I'm doing wrong? or how can I setup callback on each new frame?

You're not doing anything wrong.  The warning occurs because the 
"new-buffer" signal handler is invoked by libgstreamer from a foreign 
thread, i.e. one with no Perl runtime associated with it.  Since the 
Perl interpreter is not thread-safe, we cannot allow this foreign thread 
to invoke a Perl callback.  As of a few versions ago, perl-Glib 
therefore tries to hand the invocation over to the main thread.  I still 
consider this technique somewhat experimental (it can lead to deadlocks, 
for example), hence the warning.

> it seems that there is no perl bindings for
> http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gst-plugins-base-libs/html/gst-plugins-base-libs-appsink.html

Zach Morgan wrote bindings for this: 
<https://github.com/zpmorgan/GStreamer-App>.  But it looks like they 
never made it onto CPAN.  Zach?