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[Shevek <899748@xxxxxxxxxxxxxxxxxx>]

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https://bugs.launchpad.net/bugs/899748

Title:
  gstreamer v4l2src fails with device=

Status in “gstreamer0.10” package in Ubuntu:
  New

Bug description:
  I have only one video device, it is /dev/video0.

  This works:

  $ gst-launch 'v4l2src ! xvimagesink'
  Setting pipeline to PAUSED ...
  Pipeline is live and does not need PREROLL ...
  Setting pipeline to PLAYING ...
  New clock: GstSystemClock
  (video plays)

  This does not work:

  $ gst-launch 'v4l2src device=/dev/video0 ! xvimagesink'
  Setting pipeline to PAUSED ...
  Pipeline is live and does not need PREROLL ...
  Setting pipeline to PLAYING ...
  New clock: GstSystemClock
  ERROR: from element /GstPipeline:pipeline0/GstV4l2Src:v4l2src0: Internal data flow error.
  Additional debug info:
  gstbasesrc.c(2582): gst_base_src_loop (): /GstPipeline:pipeline0/GstV4l2Src:v4l2src0:
  streaming task paused, reason not-linked (-1)
  Execution ended after 2532703705 ns.
  Setting pipeline to PAUSED ...
  Setting pipeline to READY ...
  Setting pipeline to NULL ...
  Freeing pipeline ...

  This means that I cannot read from video1, or use v4l2loopback or
  anything, since gstreamer apparently cannot deal with the device=
  setting.

  For the record, here is part of gst-inspect v4l2src:

  Element Properties:
    name                : The name of the object
                          flags: readable, writable
                          String. Default: null Current: "v4l2src0"
    blocksize           : Size in bytes to read per buffer (-1 = default)
                          flags: readable, writable
                          Unsigned Long. Range: 0 - 18446744073709551615 Default: 4096 Current: 4096
    num-buffers         : Number of buffers to output before sending EOS (-1 = unlimited)
                          flags: readable, writable
                          Integer. Range: -1 - 2147483647 Default: -1 Current: -1
    typefind            : Run typefind before negotiating
                          flags: readable, writable
                          Boolean. Default: false Current: false
    do-timestamp        : Apply current stream time to buffers
                          flags: readable, writable
                          Boolean. Default: false Current: false
    device              : Device location
                          flags: readable, writable
                          String. Default: "/dev/video0" Current: "/dev/video0"
    device-name         : Name of the device
                          flags: readable
                          String. Default: null Current: "UVC Camera (17ef:4807)"
    device-fd           : File descriptor of the device
                          flags: readable
                          Integer. Range: -1 - 2147483647 Default: -1 Current: -1
    flags               : Device type flags
                          flags: readable
                          Flags "GstV4l2DeviceTypeFlags" Default: 0x00000000, "(none)" Current: 0x00000000, "(none)"
                             (0x00000001): capture          - Device supports video capture
                             (0x00000002): output           - Device supports video playback
                             (0x00000004): overlay          - Device supports video overlay
                             (0x00000010): vbi-capture      - Device supports the VBI capture
                             (0x00000020): vbi-output       - Device supports the VBI output
                             (0x00010000): tuner            - Device has a tuner or modulator
                             (0x00020000): audio            - Device has audio inputs or outputs

  ProblemType: Bug
  DistroRelease: Ubuntu 11.10
  Package: gstreamer-tools 0.10.35-1
  ProcVersionSignature: Ubuntu 3.0.0-13.22-generic 3.0.6
  Uname: Linux 3.0.0-13-generic x86_64
  NonfreeKernelModules: fglrx
  ApportVersion: 1.23-0ubuntu4
  Architecture: amd64
  Date: Sat Dec  3 14:33:54 2011
  EcryptfsInUse: Yes
  InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Release amd64 (20101007)
  ProcEnviron:
   PATH=(custom, user)
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  SourcePackage: gstreamer0.10
  UpgradeStatus: Upgraded to oneiric on 2011-11-30 (3 days ago)

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