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