[Bug 724899] v4l2src does not set interlaced flag on buffers

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=724899
  GStreamer | gst-plugins-good | 1.2.2

--- Comment #3 from Simon Farnsworth <simon.farnsworth at onelan.co.uk> 2014-02-21 19:24:34 UTC ---
(In reply to comment #2)
> Right, it's needed because we signal interlace-mode=mixed instead of
> interlace-mode=interleaved.
> 
Right, and we can't change that because in V4L2 land, interlace is a per-buffer
property, and could change frame-by-frame.

> Just one thing I'm wondering about: do we need to add an else branch with an
> UNSET(FLAG_INTERLACED) too then? (it seems to do that for the TFF flag, I'm
> guessing because we don't know what flags will be set on recycled buffers from
> the buffer pool?)

Quite possibly - I didn't look in depth there. My test source happens to be
interlaced all the time, so if we do need to unset it, I wouldn't notice.

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