[Bug 732910] v4l2src: Dectect and workaround decreasing HW timestamp

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=732910
  GStreamer | gst-plugins-good | git

Nicolas Dufresne <nicolas.dufresne> changed:

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--- Comment #2 from Nicolas Dufresne <nicolas.dufresne at collabora.co.uk> 2014-09-09 22:52:20 UTC ---
(From update of attachment 285487)
commit b706103fab54d38136ca234cb6013d782651d59f
Author: Nicolas Dufresne <nicolas.dufresne at collabora.co.uk>
Date:   Fri Sep 5 08:29:20 2014 -0400

    v4l2: Detect bad drivers timestamps

    Even though the UVC driver do a great deal of effort to prevent bad
    timestamp to be sent to userspace, there still exist UVC hardware that
    are so buggy that the timestamp endup nearly random. This code detect
    and ignore timestamp from these drivers, making these camera usable.
    This has been tested on both invalid and valid cameras, making sure it
    does not trigger for valid cameras.

    https://bugzilla.gnome.org/show_bug.cgi?id=732910

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