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better descriptions for remaining, poorly documented masking options.

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vi_qfactor description
Kudow to Loren Merrit


git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@13483 b3059339-0415-0410-9bf9-f77b7e298cf2
This commit is contained in:
gpoirier 2004-09-26 19:03:19 +00:00
parent fc22a65881
commit 657fa8a04f
1 changed files with 28 additions and 4 deletions
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DOCS/man/en/mplayer.1
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@ -5523,7 +5523,7 @@ quantizer factor between B and non B frames (pass\ 1/\:2) (default: 1.25)
.
.TP
.B vi_qfactor=<-31.0\-31.0>
(pass\ 1/\:2) (default: 0.8)
quantizer factor between I and non I frames (pass\ 1/\:2) (default: 0.8)
.
.TP
.B vb_qoffset=<-31.0\-31.0>
@ -5854,12 +5854,26 @@ sane range
.TP
.B tcplx_mask=<0.0\-1.0>
temporal complexity masking (default: 0.0 (disabled))
Imagine a scene with a bird flying across the whole scene, tcplx_mask
will decrease the quantizers of the bird's macroblocks (thus decreasing their
quality) as the human eye usually does not have time to see all the bird's
details.
Be warned that if the masked object stops (e.g.\& the bird lands) it is
likely to look horrible for a a short period of time (until the encoder
figures out that the object is not moving and needs refined blocks).
The saved bits will be spent on other parts of the video, which may increase
subjective quality, provided that tcplx_mask is carefully chosen.
.
.TP
.B scplx_mask=<0.0\-1.0>
Spatial complexity masking.
Larger values help against blockiness, if no deblocking filter is used for
decoding.
decoding, which is maybe not a good idea.
.br
Imagine a scene with grass (which usually has a great spatial complexity),
a blue sky and a house, scplx_mask will raise the quantizers of the grass'
macroblocks (thus decreasing its quality), in order to spend more bits on
the sky and the house.
.br
.I HINT:
Crop any black borders completely as they will reduce the quality
@ -5870,10 +5884,20 @@ disabled (default)
.IPs 0.0\-0.5
sane range
.RE
.sp 1
.I NOTE:
This setting does not have the same effect as using a custom matrix that
whould compress high frequencies harder, as scplx_mask will reduce the
quality of P-blocks even if only DC is changing, which will probably not
look as good.
.
.TP
.B p_mask=<0.0\-1.0>
inter MB masking (default: 0.0 (disabled))
.B p_mask=<0.0\-1.0> (also see vi_qfactor)
Reduces the quality of inter blocks, which is equivalent to increasing
the quality of intra blocks, since the same average bitrate will be
distributed by the rate controller to the whole video sequence
(default: 0.0 (disabled)).
p_mask=1.0 doubles the bits allocated to each intra block.
.
.TP
.B naq\ \ \ \