v4l2src GstTuner interface
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Hi,
I am trying to select physical input (S-Video, Composite, ...) The following code : ------------ ... videodevicesrc = gst_element_factory_make("v4l2src", "videodevicesrc"); ... GstTuner *tuner = GST_TUNER (videodevicesrc); ... ------------ leads to: (<unknown>:17146): GStreamer-CRITICAL **: gst_implements_interface_cast: assertion `gst_element_implements_interface (GST_ELEMENT (from), iface_type)' failed I know that v4l2src implements this interface and I got code example from http://webcvs.freedesktop.org/gstreamer/gst-plugins-good/tests/icles/v4l2src-test.c?revision=1.1&view=markup The installed packages is gstreamer0.10-plugins-good_0.10.6-0ubuntu4_i386.deb The following command lien works very fine : gst-launch-0.10 v4l2src ! xvimagesink Where am I wrong ? Sincerely Julien ------------------------------------------------------------------------- This SF.net email is sponsored by the 2008 JavaOne(SM) Conference Don't miss this year's exciting event. There's still time to save $100. Use priority code J8TL2D2. http://ad.doubleclick.net/clk;198757673;13503038;p?http://java.sun.com/javaone _______________________________________________ gstreamer-devel mailing list [hidden email] https://lists.sourceforge.net/lists/listinfo/gstreamer-devel |
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hi julien,
Julien Isorce schrieb: > Hi, > > I am trying to select physical input (S-Video, Composite, ...) > > The following code : > > ------------ > ... > videodevicesrc = gst_element_factory_make("v4l2src", "videodevicesrc"); > ... > GstTuner *tuner = GST_TUNER (videodevicesrc); > ... > ------------ > > leads to: > > (<unknown>:17146): GStreamer-CRITICAL **: gst_implements_interface_cast: > assertion `gst_element_implements_interface (GST_ELEMENT (from), > iface_type)' failed You can only cast in PAUSED or PLAYING (not sure about READY). Basically the devices has to be opened first, before the element knows that the underlying hardware has support for tuner. The gst_implements_interface mechanism is basically a hack to conditinally implement interfaces. Stefan > > > I know that v4l2src implements this interface and > I got code example from > http://webcvs.freedesktop.org/gstreamer/gst-plugins-good/tests/icles/v4l2src-test.c?revision=1.1&view=markup > <http://webcvs.freedesktop.org/gstreamer/gst-plugins-good/tests/icles/v4l2src-test.c?revision=1.1&view=markup> > > The installed packages is > gstreamer0.10-plugins-good_0.10.6-0ubuntu4_i386.deb > > The following command lien works very fine : gst-launch-0.10 v4l2src ! > xvimagesink > > Where am I wrong ? > > Sincerely > > Julien > > > ------------------------------------------------------------------------ > > ------------------------------------------------------------------------- > This SF.net email is sponsored by the 2008 JavaOne(SM) Conference > Don't miss this year's exciting event. There's still time to save $100. > Use priority code J8TL2D2. > http://ad.doubleclick.net/clk;198757673;13503038;p?http://java.sun.com/javaone > > > ------------------------------------------------------------------------ > > _______________________________________________ > gstreamer-devel mailing list > [hidden email] > https://lists.sourceforge.net/lists/listinfo/gstreamer-devel ------------------------------------------------------------------------- This SF.net email is sponsored by the 2008 JavaOne(SM) Conference Don't miss this year's exciting event. There's still time to save $100. Use priority code J8TL2D2. http://ad.doubleclick.net/clk;198757673;13503038;p?http://java.sun.com/javaone _______________________________________________ gstreamer-devel mailing list [hidden email] https://lists.sourceforge.net/lists/listinfo/gstreamer-devel |
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Hi,
Thx a lot for the explanation. It resolved my problem, I can change the physical input (s-video, composite, ...) now. Sincerely, Julien 2008/4/13, Stefan Kost <[hidden email]>: hi julien, ------------------------------------------------------------------------- This SF.net email is sponsored by the 2008 JavaOne(SM) Conference Don't miss this year's exciting event. There's still time to save $100. Use priority code J8TL2D2. http://ad.doubleclick.net/clk;198757673;13503038;p?http://java.sun.com/javaone _______________________________________________ gstreamer-devel mailing list [hidden email] https://lists.sourceforge.net/lists/listinfo/gstreamer-devel |
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