<br><br><div class="gmail_quote">On Wed, Sep 30, 2009 at 2:52 PM, thiagoss <span dir="ltr"><<a href="mailto:thiagossantos@gmail.com" target="_blank">thiagossantos@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"> <br><br><div class="gmail_quote"><div>On Wed, Sep 30, 2009 at 1:17 PM, Dick Marinus <span dir="ltr"><<a href="mailto:dick@mrns.nl" target="_blank">dick@mrns.nl</a>></span> wrote:<br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"> Hi all,<br> <br> At April 30, 2006 Fredrik posted a message about using the tuner<br> interface from Python and I'm experiencing the same issue:<br> <br> $ python<br> >>> import gst<br> >>> source = gst.element_factory_make("v4l2src",name="Pinnacle PCTV<br> USB2.0")<br> >>> print source.get_channel()<br> <br> (.:13363): GStreamer-CRITICAL **: gst_implements_interface_cast:<br> assertion `gst_element_implements_interface (GST_ELEMENT (from),<br> iface_type)' failed<br> <br> ** (.:13363): CRITICAL **: gst_tuner_get_channel: assertion<br> `GST_IS_TUNER (tuner)' failed<br> <br> I've tried to set the pipeline queue to STATE_PLAYING but I still have<br> the same error.<br> <br> I guess something is broken at the Python bindings. Could someone please<br> help me?<br></blockquote></div><div><br>I had this same problem this week on a toy project and thaytan sent me a python script that uses GstTuner interface from v4l2src, but I still haven't looked deeply at it. I'll do it tonight and I'll update here with my findings.<br><br>One thing I noticed, though, is that GstV4l2Src is using a subclass of GstTunerChannel that is not mapped/exported in the python bindings (but I don't know much about bindings and thaytan said it worked for him, so I believe I'm doing something wrong in my code).<br> <br></div></div></blockquote><div><br>Found what was wrong:<br><br>1) It will not work on NULL state, I don't know if works on READY, tested only with it PLAYING and I'm assuming it also works for PAUSED<br><br>2) You're not supposed to create your own gst.TunerChannel objects and set them, you have to do src.list_channels() and pick one to set.<br> <br>Works perfectly here. Maybe the docs could be updated to clarify this.<br> </div><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"><div class="gmail_quote"> <div> </div><div><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"> <br> I'm using:<br> gst-python=0.10.16<br> gstreamer=0.10.24<br> gst-plugins-good=0.10.16<br> gst-plugins-base=0.10.24<br> <br> Thanks in advance,<br> Dick<br> <br> <br> ------------------------------------------------------------------------------<br> Come build with us! The BlackBerry&reg; Developer Conference in SF, CA<br> is the only developer event you need to attend this year. Jumpstart your<br> developing skills, take BlackBerry mobile applications to market and stay<br> ahead of the curve. Join us from November 9&#45;12, 2009. Register now&#33;<br> <a href="http://p.sf.net/sfu/devconf" target="_blank">http://p.sf.net/sfu/devconf</a><br> _______________________________________________<br> gstreamer-devel mailing list<br> <a href="mailto:gstreamer-devel@lists.sourceforge.net" target="_blank">gstreamer-devel@lists.sourceforge.net</a><br> <a href="https://lists.sourceforge.net/lists/listinfo/gstreamer-devel" target="_blank">https://lists.sourceforge.net/lists/listinfo/gstreamer-devel</a><br> </blockquote></div></div><font color="#888888"><br><br clear="all"><br>-- <br>Thiago Sousa Santos<br> </font></blockquote></div><br><br clear="all"><br>-- <br>Thiago Sousa Santos<br>