[NUT-devel] Frame/Field problem
Michael Niedermayer
michaelni at gmx.at
Wed Feb 20 05:23:14 CET 2008
Hi
When we designed the pts->dts reorder algorithm we considered arbitrary
frame reorderings, but there was something we missed, that are mixes of
frame and field pictures, like:
i1 p2 P3 p4 P5 p7 P8 (lower case is a field, upper is a frame)
PTS 2 3 4 6 7 9 10
DTS 0 1 2 4 5 7 8
As you can see no reordering of PTS can result in the DTS values.
The reason why this fails is (if my brain still works at 5:30am) that frame
pictures contain 2 fields and thus would have to be counted like 2
besides that they would really need 2 pts.
I suspect some solution based on dummy 0byte packets with the missing pts
after each frame might solve this, but i must think more about this ...
--
Michael GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB
I do not agree with what you have to say, but I'll defend to the death your
right to say it. -- Voltaire
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