Enrico, Does the FoxBoard supports usb 2.0 or 1.1 ports? Some cameras only enable yuv format when connected to a usb 2 port.
Best regards, Paulo 2009/5/15 Enrico Di Lello <[email protected]> > Hi Laurent, > > thank for your early reply. I don't know if I should send this mail in > the mailing list or directly to you. > I think that my problem is pretty simple, and since your name is on > the comments of the uvc_video source code, I think you're the best > person I could ask for help . > > I did not manage, for now to compile the mercurial package for my > system, but I managed to compile the r261 version from the berlios > repository. I wrote a simple application to grab a frame from a camera > in YUV422 format. > > The problem is: this application I wrote works just fine on my ubuntu > laptop with uvcvideo (Mercurial repository). Camera recognized, YUV422 > format set, frame grabbing runs just fine. > > When I connect the same webcam ( Creative Optia ) on my FoxBoard, the > system does recognize the camera, because I can see it in dmesg. > > When I run the same application, I receive an error when trying to set > the YUV422 format. More precisely, the VIDIOC_S_FMT fails when > requiring this format. > > Surprisingly, it successfully sets the format if I choose the MJPEG format. > > From the source code (of r261) I can see that the YUYV is supported, > so I dont'understand why my application should'n work with the same > camera on a different architecture. Another application (uvcstreamer) > that grabs frames in MJPEG format just works fine on FoxBoard... > > Why should I disable the V4L support from my kernel? I did so, and > compiled everything again, but now I actually get the error msg when > launching VIDIOC_REQBUFS the ioctl. Again, same code and same camera > work fine on Ubuntu with kernel 2.6.24, while on my FoxBoard I have > the 2.6.25. > > Many thanks to anyone who will help me with this. > > Enrico > _______________________________________________ > Linux-uvc-devel mailing list > [email protected] > https://lists.berlios.de/mailman/listinfo/linux-uvc-devel >
_______________________________________________ Linux-uvc-devel mailing list [email protected] https://lists.berlios.de/mailman/listinfo/linux-uvc-devel
