[gstreamer-bugs] [Bug 565980] New: gconfvideosrc assumes v4l when given a partial pipeline

GStreamer (bugzilla.gnome.org) bugzilla-daemon at bugzilla.gnome.org
Mon Dec 29 14:26:20 PST 2008


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  GStreamer | gst-plugins-good | Ver: 0.10.11
           Summary: gconfvideosrc assumes v4l when given a partial pipeline
           Product: GStreamer
           Version: 0.10.11
          Platform: Other
        OS/Version: All
            Status: UNCONFIRMED
          Severity: normal
          Priority: Normal
         Component: gst-plugins-good
        AssignedTo: gstreamer-bugs at lists.sourceforge.net
        ReportedBy: a.j.delaney at brighton.ac.uk
         QAContact: gstreamer-bugs at lists.sourceforge.net
     GNOME version: 2.23/2.24
   GNOME milestone: Unspecified


Please describe the problem:
I have a webcam which is a v4l2 device.  Because of a bug in the underlying
driver I want to specify my videosrc as "v4l2src !
video/x-raw-yuv,width=320,height=240" i.e. with a specific width and height. 
If I specify my videosrc as v4l2src then my webcam is treated as a v4l2 device
however if I specify the partial pipeline then gstreamer assumes it's a v4l
device.

Steps to reproduce:
1. Modify /system/gstreamer/0.10/default/videosrc gconf setting to be "v4l2src
! video/x-raw-yuv,width=320,height=240"
2. Execute "gst-launch-0.10 gconfvideosrc ! xvimagesink"



Actual results:
The execution fails with the following output
Setting pipeline to PLAYING ...
New clock: GstSystemClock
ERROR: from element
/GstPipeline:pipeline0/GstGConfVideoSrc:gconfvideosrc0/GstV4lSrc:v4lsrc0: Could
not synchronise on resource.
Additional debug info:
v4lsrc_calls.c(124): gst_v4lsrc_sync_frame ():
/GstPipeline:pipeline0/GstGConfVideoSrc:gconfvideosrc0/GstV4lSrc:v4lsrc0:
system error: Invalid argument

The webcam is being called via the v4l interface, not the v4l2 interface.

Expected results:
I would expect gstreamer to guess that as the pipeline contains v4l2src that it
should be treated as such.

Does this happen every time?
Yes

Other information:
Running latest updates on Fedora 10.


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