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List:       gstreamer-devel
Subject:    [gst-devel]  v4l2src0: Could not negotiate format
From:       John Buckley <buckleyassoc () comcast ! net>
Date:       2009-10-31 21:51:59
Message-ID: 26146240.post () talk ! nabble ! com
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Hello,
I've been trying to get an approved USB webcam (Creative Optia AF) to run
using GStreamer and sending the output to an  XWindow and I keep getting
failures.

I have the uvcvideo module loaded and /dev/video0 is present.

I am running openembedded on the Gumstix Verdex Pro XL6P.  Could it be that
the camera is USB 2.0 and the Verdex Pro is only rated for USB 1.1?

This is what I see when I plug the camera in...

root@gumstix-custom-verdex:~# usb 1-2: new full speed USB device using
pxa27x-ohci and address 4
usb 1-2: configuration #1 chosen from 1 choice
uvcvideo: Found UVC 1.00 device VF0560 Live! Cam Optia AF (041e:406d)
input: VF0560 Live! Cam Optia AF as
/devices/platform/pxa27x-ohci/usb1/1-2/1-2:1.0/input/input3
4:3:1: cannot get freq at ep 0x84

When I try to gst-launch with the v4lsrc or v4l2src elements and I get the
error below.  I have tried a variety of settings using the 'video/x-raw-rgb'
cap but I always get the same error.  The videotestsrc element works fine
with ximagesink.

root@gumstix-custom-verdex:~# gst-launch v4l2src ! ximagesink
Setting pipeline to PAUSED ...
ERROR: Pipeline doesn't want to pause.
ERROR: from element /GstPipeline:pipeline0/GstV4l2Src:v4l2src0: Could not
negotiate format
Additional debug info:
gstbasesrc.c(2584): gst_base_src_start ():
/GstPipeline:pipeline0/GstV4l2Src:v4l2src0:
Check your filtered caps, if any
Setting pipeline to NULL ...
Freeing pipeline ...
root@gumstix-custom-verdex:~# 

Any help would be greatly appreciated...
Thanks,
John Buckley

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