Hi Claudiu, On Tue, Jan 18, 2011 at 11:37 AM, Claudiu Covaci <claudiu.covaci@xxxxxxxxx> wrote: > Hi, > > I'm have trouble receiving a video stream on the Freescale i.MX51 > processor. I've tried everything I could think, so I'm trying my luck > here. > > I'm using a 2.6.31 kernel with some modifications: the camera capture > driver [1] and the IPU (Image Processing Unit) driver [2] from the > Freescale BSP 2010.11. > > I'm at a point where I can open the /dev/video0 device and can (at > least try to) read frames, but it fails at dequeueing the video > buffers (VIDIOC_DQBUF) with the message: > <3>ERROR: v4l2 capture: mxc_v4l_dqueue timeout enc_counter 0 > Unable to dequeue buffer (62). > > - I've double-checked the IPU registers and they seem properly > configured, but I don't get any interrupt (at end-of-frame). > - The relevant IOMUX pins are also configured. > - the video signal appears at the i.MX pins (so it gets there) > - I've also tried activating the internal picture generator, but still > nothing happens. > > Is there anything I overlooked? Is there a way to find out where the > problem is? Any hints will be greatly appreciated. These are the steps I do on a MX51EVK connected to the expansion board with a OV3640 camera: modprobe mxc_v4l2_capture modprobe ov3640_camera gst-launch mfw_v4lsrc ! mfw_v4lsink Then I got the camera preview in the LCD/DVI output. Regards, Fabio Estevam -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
