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