Hello,
I downloaded the [usb_cam](http://wiki.ros.org/usb_cam) package to use with a frame grabber that uses the eMPIA 2861 chip. This, when it is plugged in, appears in /dev/video1 (since I have a webcam). Using the launch file provided in the [usb_cam](http://wiki.ros.org/usb_cam) package, I am able to view my web cam (in /dev/video0), but when I want to access the other camera, I get an almost black screen:
please, note that the image is not perfectly black, it has thin vertical lines that, in the video stream, move a bit. Regardless of the camera being connected or not, I get the same image.
You can find more information about this problem [here](http://askubuntu.com/questions/793664/video-capture-with-empia-2861-chip-not-working).
Any idea on what to do? Some experiments for my phD depends on getting images from this camera!!!!
Thank you!!!
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