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- explain lavc lmin option more clearly

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- document lavc mblmin and mblmax options


git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@20773 b3059339-0415-0410-9bf9-f77b7e298cf2
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corey 2006-11-08 03:23:02 +00:00
parent da8cb27dbd
commit 7e5c903723
1 changed files with 23 additions and 2 deletions
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DOCS/man/en/mplayer.1
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@ -7129,8 +7129,15 @@ the future, msmpeg4 cannot be fixed as it does not support that.)
.
.TP
.B lmin=<0.01\-255.0>
Minimum Lagrange multiplier for ratecontrol, you probably want it to be
equal to or lower than vqmin (default: 2.0).
Minimum frame-level Lagrange multiplier for ratecontrol (default: 2.0).
Lavc will rarely use quantizers below the value of lmin.
Lowering lmin will make lavc more likely to choose lower quantizers for
some frames, but not lower than the value of vqmin.
Likewise, raising lmin will make lavc less likely to choose low
quantizers, even if vqmin would have allowed them.
You probably want to set lmin approximately equal to vqmin.
When adaptive quantization is in use, changing lmin/lmax may have less
of an effect; see mblmin/mblmax.
.RE
.
.TP
@ -7139,6 +7146,20 @@ maximum Lagrange multiplier for ratecontrol (default: 31.0)
.RE
.
.TP
.B mblmin=<0.01\-255.0>
Minimum macroblock-level Lagrange multiplier for ratecontrol
(default:2.0).
This parameter affects adaptive quantization options like qprd,
lumi_mask, etc..
.RE
.
.TP
.B mblmax=<0.01\-255.0>
Maximum macroblock-level Lagrange multiplier for ratecontrol
(default: 31.0).
.RE
.
.TP
.B vqscale=<0\-31>
Constant quantizer /\: constant quality encoding (selects fixed quantizer mode).
A lower value means better quality but larger files (default: 0).