From: Fredrik P. <fr...@br...> - 2006-04-30 19:14:15
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Hi! I'm writing a small Python app where I use a Pinnacle USB tuner with v4l2src. The hardware have three different inputs; "Television", "Composite1" and "S-video". I found those using the command "v4l-info". That gave me this output: /.../ channels VIDIOCGCHAN(0) channel : 0 name : "Television" tuners : 1 flags : 0x1 [TUNER] type : TV norm : 0 VIDIOCGCHAN(1) channel : 1 name : "Composite1" tuners : 0 flags : 0x0 [] type : CAMERA norm : 0 VIDIOCGCHAN(2) channel : 2 name : "S-Video" tuners : 0 flags : 0x0 [] type : CAMERA norm : 0 /.../ "gst-inspect v4l2src" gives me this: /.../ input : input/output (channel) to switch to flags: readable, writable String. Default: null Current: null frequency : frequency to tune to (in Hz) flags: readable, writable Unsigned Long. Range: 0 - 18446744073709551615 Default: 0 Current: 0 /.../ So I assumed that "input" corresponds to the three input methods described above. This is what I did in python: source = gst.element_factory_make("v4l2src",name="Pinnacle PCTV USB2.0") source.set_property("input","Composite1") ... and then I build a pipeline using that source element. This does not work, I don't get the signal from the composite input. (And I know it's there, because when I run xawtv and select "Composite1", I can see the video stream.) So my question is; how do I make it so that the v4l2src element properly tells the v4l2 driver to select the composite (or S-video) input? (In python, preferably.) Thank you in advance! /Fredrik Persson |