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Document the skip* lavd options.

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Thanks to Guillaume for helping me out with the formatting :-).


git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@16030 b3059339-0415-0410-9bf9-f77b7e298cf2
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reimar 2005-07-20 15:09:09 +00:00
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DOCS/man/en/mplayer.1
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@ -3325,6 +3325,38 @@ video is major than or equal to <w>.
Skip the given number of macroblock rows at the bottom.
.IPs "st=<number> (MPEG-2 only)"
Skip the given number of macroblock rows at the top.
.IPs skiploopfilter=<skipvalue> (H.264 only)
Skips the loop filter (aka deblocking) during H.264 decoding.
Since the filtered frame is supposed to be used as reference
for decoding dependant frames this has a worse effect on quality
than not doing deblocking on e.g. MPEG2 video.
But at least for high bitrate HDTV this provides a big speedup with
no visible quality loss.
.sp 1
<skipvalue> can be either one of the following:
.RSss
.br
none: never skip
.br
default: skip when the processing step is useless (e.g. 0 size packets in AVI)
.br
nonref: skip for frames that are not referenced (i.e. not used for
decoding other frames, the error can not "build up")
.br
bidir: skip for B-Frames
.br
nonkey: skip for all frames except keyframes
.br
all: skip for all frames
.REss
.IPs skipidct=<skipvalue> (MPEG1/2 only)
Skips the IDCT step.
This looses a lot of quality in almost all cases
(see skiploopfilter for available skip values).
.IPs skipframe=<skipvalue>
Skips decoding of frames completely.
Big speedup, but jerky motion and sometimes bad artefacts
(see skiploopfilter for available skip values).
.IPs vismv=<value>
Visualize motion vectors.
.RSss