[Bug 779213] buffer: Add GstReferenceTimestampMeta

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=779213

Sebastian Dröge (slomo) <slomo at coaxion.net> changed:

           What    |Removed                     |Added
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 Attachment #349229|0                           |1
        is obsolete|                            |

--- Comment #18 from Sebastian Dröge (slomo) <slomo at coaxion.net> ---
Created attachment 351705
  --> https://bugzilla.gnome.org/attachment.cgi?id=351705&action=edit
decklinkvideo/audiosrc: Add GstReferenceTimestampMeta with the stream time to
each buffer

This is basically a frame counter provided by the driver and it's
advancing at the speed of the HDMI/SDI input. Having this available on
each buffer allows to know what constant-framerate-based timestamp each
frame is corresponding to and can be used e.g. to write out files
accordingly without having the local pipeline clock timestamps used.

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