[Bug 743013] New: v4l2bufferpool: set v4l2_buffer.field when queuing buffer in an output device

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=743013
  GStreamer | gst-plugins-good | git

           Summary: v4l2bufferpool: set v4l2_buffer.field when queuing
                    buffer in an output device
    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: aurelien.zanelli at parrot.com
         QAContact: gstreamer-bugs at lists.freedesktop.org
     GNOME version: ---


Currently, while running pipeline with a v4l2sink, I've a lot of
"FIXME Unhandled enum v4l2_field 0 - treating as progressive"
when dequeuing buffers.

Although checking field value when dequeuing a buffer from an output device is
not very relevant as the buffer will just go into the bufferpool to further
use, it help be found out that when we queue buffers, we don't set the
v4l2_buffer.field to a valid value as required by the current specification
foran output device.

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