<html><body>Hi, yes, I saw that example before and it didn't worked either. But I got something new (and disturbing) - I installed "python-gst-1.0-dbg" package, so I could analyze all debug messages and to my great surprise, it started working (both my example and sinkelement.py). It now works even if I uninstall all "*-dbg" packages which were installed with "python-gst-1.0-dbg". But it really doesn't help. I don't want to install debug packages on production servers. I really need to know WHAT went wrong.. And it seems to me it's probably some bug in gstreamer-python binding, so I should report it. BTW - my machine is (was) freshly installed last week and I just started porting our software from gstreamer-0.10 to gstreamer-1.0, so there was no "interference" with previously installed sw.. ---------- Původní zpráva ---------- Od: Thibault Saunier <tsaunier@gnome.org> Komu: Discussion of the development of and with GStreamer <gstreamer-devel@lists.freedesktop.org> Datum: 27. 10. 2015 19:15:25 Předmět: Re: creating custom sink in python fails <blockquote>Hello, That should work, we have an example in gst-python that implement a stupid simple sink in python[0]. It is based on GstElement instead of BaseSink but it should probably be ported. Regards, Thibault. [0] http://cgit.freedesktop.org/gstreamer/gst-python/tree/examples/plugins/python/sinkelement.py On Tue, Oct 27, 2015 at 2:45 PM, Jan Spurný <JSpurny@seznam.cz> wrote: > Hi, > > I have problem with (probably) python binding for gstreamer-1.0 (1.4.4.0) - I was porting some code from gstreamer-0.10 (pygst) to new gstreamer-1.0 and I'm not able to get elements written in python to work. This is minimal working example (python2.7): > > --------------------------------------------------------------------- > import gi > gi.require_version('Gst', '1.0') > from gi.repository import Gst > from gi.repository import GstBase > from gi.repository import GObject > > GObject.threads_init() > Gst.init() > > class MySink(GstBase.BaseSink): > __gstmetadata__ = ('My Sink', 'Sink', 'Sink', 'foo bar') > __gsttemplates__ = ( > Gst.PadTemplate.new("sink", > Gst.PadDirection.SINK, Gst.PadPresence.ALWAYS, > Gst.caps_from_string('text/plain')),) > > def plugin_init(plugin, userarg): > t = GObject.type_register(MySink) > Gst.Element.register(plugin, 'my_sink', 0, t) > return True > > version = Gst.version() > r = Gst.Plugin.register_static_full( > version[0], version[1], 'my_plugin', 'my plugin desc', > plugin_init, '1.0', 'Proprietary', 'abc', 'def', 'ghi', None) > > s = MySink() > --------------------------------------------------------------------- > > and it throws a CRITICAL error: > > --------------------------------------------------------------------- > $ ./mysink.py > (python2:18618): GStreamer-WARNING **: Element factory metadata for 'my_sink' has no valid long-name field > ** (python2:18618): CRITICAL **: gst_base_sink_init: assertion 'pad_template != NULL' failedI'm not that worried about the warning, but that CRITICAL error means the element has no sinkpad and can't be linked. > --------------------------------------------------------------------- > > And worst thing - if I remove __gsttemplates__ and __gstmetadata__ completely, NOTHING changes. It seems to me that BaseSink.__init__() doesn't see it. > > Does anyone have any idea what I'm doing wrong? Also I would greatly appreciate any documentation, examples or tutorials on python binding for gstreamer-1.0, because I wasn't able to find much > > Thanks, > Jan Spurny > > _______________________________________________ > gstreamer-devel mailing list > gstreamer-devel@lists.freedesktop.org > http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel _______________________________________________ gstreamer-devel mailing list gstreamer-devel@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel</blockquote></body></html>