Author: michael
Date: Mon Nov 13 16:23:45 2006
New Revision: 20886
Modified:
trunk/DOCS/tech/nut.txt
Log:
pts definition by mans
dts definition and decode_delay definition by me
Modified: trunk/DOCS/tech/nut.txt
============================================================
==================
--- trunk/DOCS/tech/nut.txt (original)
+++ trunk/DOCS/tech/nut.txt Mon Nov 13 16:23:45 2006
 -68,6
+68,11
keyframe status of the current frame but instead just
set the frame as
non keyframe
(FIXME maybe move somewhere else?)
+pts
+ presentation time of the first frame/sample that is
completed by decoding
+ the coded frame.
+dts
+ of a frame is the time when it is input into the
decoder
Syntax:
-542,10
+547,13
MUST be <16
decode_delay
- maximum time between input and output for a codec, used
to generate
- dts from pts
- is set to 0 for streams without B-frames, and set to 1
for streams with
- B-frames, may be larger for future codecs
+ size of the reordering buffer used to convert pts to
dts
+ codecs which dont support b frames normaly use 0
+ mpeg1/mpeg2 style codecs with b frames use 1
+ h264 style b pyramid uses 2
+ h264 and future codecs might need values >2
+ audio codecs generally use 0 (we arent aware of any
which doesnt
+ but its theoretically possible that one exists which
needs it >0)
decode_delay MUST NOT be set higher than necessary for
a codec.
stream_flags
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