Hi again, I tried a slightly different command: gst-launch-0.10 v4l2src ! video/x-raw-yuv,width=640,height=480 ! xvimagesink
(gst-launch-0.10:6239): GLib-WARNING **: g_set_prgname() called multiple times Setting pipeline to PAUSED ... Pipeline is live and does not need PREROLL ... ERROR: from element /GstPipeline:pipeline0/GstV4l2Src:v4l2src0: Device '/dev/video0' cannot capture at 640x480 Additional debug info: gstv4l2object.c(1854): gst_v4l2_object_set_format (): /GstPipeline:pipeline0/GstV4l2Src:v4l2src0: Call to S_FMT failed for YUYV @ 640x480: Input/output error ERROR: pipeline doesn't want to preroll. Setting pipeline to PAUSED ... Setting pipeline to READY ... Setting pipeline to NULL ... Freeing pipeline ... and I KNOW this camera works at that resolution and video format. I setup the same camera on the other laptop that previously had OpenSUSE installed and it worked with kernel version 2.6.31-r10 (x86, gentoo this time). The broken one is 2.6.31-r6 amd 64bit. are CONFIG_USB_VIDEO_CLASS=m CONFIG_USB_VIDEO_CLASS_INPUT_EVDEV=y the only kernel parameters that matter? I tried with both the usb audio module enabled and disabled. (built in for the audio) The camera has a mic, but I don't care about it. Thanks, Chris >Hi Christopher, >On Friday 05 March 2010 18:43:13 Christopher Harvey wrote: >> I've been trying to fix a problem with one of my computers that is >> preventing me from using gstreamer with uvc cameras for a while now. I >> asked on the gstreamer lists recently, but got no answer. >> >> Firstly, my camera runs fine with guvcview, and I haven't had problems with >> this camera on other computers. (Namely a default OpenSUSE install, even >> with gstreamer) >> >> I have a gentoo computer here that refuses to run the camera with >> gstreamer. >> >> ERROR: from element /GstPipeline:pipeline0/GstV4l2Src:v4l2src0: Device >> '/dev/video0' cannot capture at 320x240 >> Additional debug info: >> gstv4l2object.c(1919): gst_v4l2_object_set_format (): >> /GstPipeline:pipeline0/GstV4l2Src:v4l2src0: >> Call to S_FMT failed for YU12 @ 320x240: Invalid argument > >It's quite simple, your webcam doesn't support the YU12 format requested by >gstreamer. You need to select another format (YUYV should work). >> Before I dive into gstreamer source code I wanted to see if anybody here >> happened to have any tips for uvc cameras and gstreamer. (Yes Cameras, I >> tried a few) >> >> Here is some system information: >> $ uname -a >> Linux Tool 2.6.31-gentoo-r6 #7 SMP PREEMPT Sat Feb 20 13:32:41 EST 2010 >> x86_64 AMD Athlon(tm) 64 X2 Dual Core Processor 4200+ AuthenticAMD >> GNU/Linux >> >> Bus 001 Device 003: ID 046d:08ca Logitech, Inc. Mic (Fusion) >> >> [I--] [ ~] media-libs/gstreamer-0.10.25 (0.10) (tried 0.10.24 as well) >> >> # zcat /proc/config.gz | grep V4L >> CONFIG_VIDEO_V4L2_COMMON=y >> # CONFIG_VIDEO_ALLOW_V4L1 is not set >> # CONFIG_VIDEO_V4L1_COMPAT is not set >> CONFIG_VIDEO_V4L2=y >> CONFIG_V4L_USB_DRIVERS=y >> >> Does this look familiar to anybody? > >-- >Regards, > >Laurent Pinchart _______________________________________________ Linux-uvc-devel mailing list Linux-uvc-devel@lists.berlios.de https://lists.berlios.de/mailman/listinfo/linux-uvc-devel
