[Bug 670257] New: [v4l2src] fails to renegotiate from ready to paused

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=670257
  GStreamer | gst-plugins-good | git

           Summary: [v4l2src] fails to renegotiate from ready to paused
    Classification: Platform
           Product: GStreamer
           Version: git
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: Normal
         Component: gst-plugins-good
        AssignedTo: gstreamer-bugs at lists.freedesktop.org
        ReportedBy: thiago.sousa.santos at collabora.co.uk
         QAContact: gstreamer-bugs at lists.freedesktop.org
     GNOME version: ---


Created an attachment (id=207829)
 --> (https://bugzilla.gnome.org/attachment.cgi?id=207829)
Test app

In the following pipeline:

v4l2src ! capsfilter ! fakesink

If we set the capsfilter to a 640x480 video format and start the pipeline, it
should negotiate successfully. Then, we set the v4l2src to ready and change the
capsfilter to 320x240 and set the v4l2src to playing.

The problem is that the v4l2src fails to go to playing this second time. AFAIK,
caps negotiation happens from ready to paused and the v4l2src should configure
the new format and stream successfully.

I'm attaching a test case.

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