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| author | iive <iive@b3059339-0415-0410-9bf9-f77b7e298cf2> | 2005-12-24 16:13:12 +0000 |
|---|---|---|
| committer | iive <iive@b3059339-0415-0410-9bf9-f77b7e298cf2> | 2005-12-24 16:13:12 +0000 |
| commit | b189efcebbec4c921584a6ee54b12f780807d752 (patch) | |
| tree | c3da3e5e3e28e90cfcfad4301553fe1e9a16bd59 /DOCS | |
| parent | 228f0abcf4152c6f7badda793679a0a81a6ecac5 (diff) | |
| download | mpv-b189efcebbec4c921584a6ee54b12f780807d752.tar.bz2 mpv-b189efcebbec4c921584a6ee54b12f780807d752.tar.xz | |
The <=132 frame rule is only valid at MacroBlock level not at frame one.
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
Diffstat (limited to 'DOCS')
| -rw-r--r-- | DOCS/man/en/mplayer.1 | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/DOCS/man/en/mplayer.1 b/DOCS/man/en/mplayer.1 index 462708b2cb..08fdf3c771 100644 --- a/DOCS/man/en/mplayer.1 +++ b/DOCS/man/en/mplayer.1 @@ -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> |