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The <=132 frame rule is only valid at MacroBlock level not at frame one.

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Following it gives worse compression even with IP sequence.(B-Frames doesn't accumulate error)


git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@17234 b3059339-0415-0410-9bf9-f77b7e298cf2
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iive 2005-12-24 16:13:12 +00:00
parent 228f0abcf4
commit b189efcebb
1 changed files with 4 additions and 3 deletions
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DOCS/man/en/mplayer.1
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@ -6771,14 +6771,15 @@ Does absolutely nothing at the moment.
.TP
.B keyint=<0\-300>
maximum interval between keyframes in frames (default: 250 or one
keyframe every ten seconds in a 25fps movie).
Keyframes are needed for seeking as seeking is only possible to a keyframe, but
keyframe every ten seconds in a 25fps movie. This is recommended default for MPEG-4).
Most codecs require regular keyframes in order to limit the accumulation of mismatch error.
Keyframes are also needed for seeking as seeking is only possible to a keyframe, but
keyframes need more space than other frames, so larger numbers here mean
slightly smaller files but less precise seeking.
0 is equivalent to 1, which makes every frame a keyframe.
Values >300 are not recommended as the quality might be bad depending upon
decoder, encoder and luck.
For a strict MPEG-1/2/4 compliance this would have to be <=132.
It is a common for MPEG-1/2 to use values <=30.
.
.TP
.B sc_threshold=<-1000000000\-1000000000>