On 08/22/13 18:05, Jack wrote: > When I compile streamViewer.cpp which contains the gstreamer pipe > finishing by : v4l2sink device=/dev/video2, i get no error. > And after : > $ ./streamViewer > the application runs as expected.
you might try to create a slightly more complex pipeline, that outputs to both v4l2sink *and* autovideosink (so you can see whether the pipeline is running). > > In Pd, i open the help patch about [pix_video] and send the message > [driver v4l2, device 2( to [pix_video]. > I expect to get the stream, but i get (in the pd console) : > Cannot open '/dev/video2': 2, Aucun fichier ou dossier de ce type > v4l: failed opening device: '/dev/video2' > > So, it seems the gstreamer pipe is wrong OR the streamViewer.cpp is > wrong after the modification. > How can i solve this problem ? try raising the verbosity of streamViewer, to see what it really does: ./streamViewer --gst-debug-level=4 check what happens to the videodevice when streamViewer should write to it. try: v4l2-ctl --all -d /dev/video2 to see the mode of the device. also check /sys/devices/virtual/video4linux/video2/format whether the format has been set correctly. fgmasdr IOhannes
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