Hi, I am not sure about your question and your requirements but the v4l2src from plugins-good implements the gsttunner interface, that permits to select the input. An example to use it here : <a href="http://webcvs.freedesktop.org/gstreamer/gst-plugins-good/tests/icles/v4l2src-test.c?revision=1.1&view=markup" target="_blank">http://webcvs.freedesktop.org/gstreamer/gst-plugins-good/tests/icles/v4l2src-test.c?revision=1.1&view=markup</a> Stefan said : "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." I have experimented it and it works fine. (note that The S-Video and Composite input were switched but I think it's a driver problem.) Ok, if you are talking about playing multiple channel at the same time, I am not aware about this. Sincerely J. <div class="gmail_quote">2008/5/5 Farkas Levente <<a href="mailto:lfarkas@bppiac.hu">lfarkas@bppiac.hu</a>>: <blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"> hi, in the old days there exists such a properties as channel, but now it's disappear. and there was an input too, which is also disappear. why? is there anything what can i use? eg. if i've a 4 channel BT878 v4l source can i see the second channel with gst-launch? --   Levente                               "Si vis pacem para bellum!" ------------------------------------------------------------------------- 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. <a href="http://ad.doubleclick.net/clk;198757673;13503038;p?http://java.sun.com/javaone" target="_blank">http://ad.doubleclick.net/clk;198757673;13503038;p?http://java.sun.com/javaone</a> _______________________________________________ gstreamer-devel mailing list <a href="mailto:gstreamer-devel@lists.sourceforge.net">gstreamer-devel@lists.sourceforge.net</a> <a href="https://lists.sourceforge.net/lists/listinfo/gstreamer-devel" target="_blank">https://lists.sourceforge.net/lists/listinfo/gstreamer-devel</a> </blockquote></div>