Author: michael
Date: Mon Mar 3 18:03:25 2008
New Revision: 654
Log:
A few words on how the keyframes could be aligned.
Modified:
docs/nut.txt
Modified: docs/nut.txt
============================================================
==================
--- docs/nut.txt (original)
+++ docs/nut.txt Mon Mar 3 18:03:25 2008
 -1045,7
+1045,13 shortest back ptrs: <-----------------
In the bad example a player would have to demux and decode
half of the video
between the 2 keyrames to start correct playback if it
favors the shortest
-back pointer.
+back pointer. A player could of course also choose to
ignore subtitles and
+thus not display them between the video keyframe and
subtitle frame. This
+would avoid the decoding but not neccessarily demuxing and
of course would
+lead to incorrect display (no subtitles). An encoding
application SHOULD thus
+try to reasonably align keyframes in time. This could be
achieved by repeating
+subtitle packets at video keyframes (with appropriately
adjusted start/end
+times in the subtitle packets if needed).
The above considerations are not specific to NUT.
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