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pts definition by mans

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dts definition and decode_delay definition by me


git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@20886 b3059339-0415-0410-9bf9-f77b7e298cf2
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michael 2006-11-13 15:23:45 +00:00
parent e7925a4480
commit 865cb2fbf2
1 changed files with 12 additions and 4 deletions
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DOCS/tech/nut.txt
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@ -68,6 +68,11 @@ keyframe
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 @@ msb_pts_shift
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