[gstreamer-bugs] [Bug 163577] [RFC] Interlaced/progressive media support in GStreamer.

[GStreamer (bugzilla.gnome.org)]

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  GStreamer | gstreamer (core) | Ver: HEAD CVS

Edward Hervey changed:

           What    |Removed                     |Added
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                 CC|                            |bilboed at gmail.com




------- Comment #19 from Edward Hervey  2008-11-18 11:07 UTC -------
This is the implementation proposal we came up with during the Google SOC
Mentor Summit 2008.

Were present : David Schleef, Michael Smith, Edward Hervey, Timothy Terriberry
and Christian Schaller.

This implementation proposal is based on the review of all previous
documentation, and feedback of the people present.

Interlacing support proposal for 0.10

In order to cover all the cases we need to add the following:

 * A boolean caps property for video/x-raw-* streams:
    'interlaced'
   If not present (as currently), this implies 'interlaced=False'
   If True, the GstBuffers contain a frame with two interlaced fields
   If False, the GstBuffer contain a progressive frame

 * 2 GstBufferFlags (which only make sense if the 'interlaced' field is present
in the caps AND True).
  Top Field First
  ==> #define GST_VIDEO_BUFFER_TFF GST_BUFFER_FLAG_MEDIA1
   If present, the even lines make up the top field.
   If not, the odd lines makes up the top field.

  Repeat First Field
  ==> #define GST_VIDEO_BUFFER_RFF GST_BUFFER_FLAG_MEDIA2
   If present, the first field (defined above) should be repeated (ending up in
the frame being displayed for 3 * field_duration).
   If not present, this is the classic case when the frame will be displayed
for 2 * field_duration.


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