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Fix a misleading section in the libavcodec options manual indicating that a

rc_eq of 1 will return a CBR encode and a rc_eq of tex a const QP encode;
likewise for qcomp.
patch by tripp, eliared yahoo com


git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@27390 b3059339-0415-0410-9bf9-f77b7e298cf2
This commit is contained in:
diego 2008-08-01 18:10:01 +00:00
parent 0ae6b046a2
commit 95c0b67d60

View File

@ -8196,24 +8196,14 @@ the quantizer more over time (slower change).
.TP
.B vqcomp=<0.0\-1.0>
Quantizer compression, vrc_eq depends upon this (default: 0.5).
For instance, assuming the default rate control equation is used,
if vqcomp=1.0, the ratecontrol allocates to each frame the number of bits
needed to encode them all at the same QP.
If vqcomp=0.0, the ratecontrol allocates the same number of bits to each
frame, i.e. strict CBR.
.I NOTE:
Those are extreme settings and should never be used.
Perceptual quality will be optimal somewhere in between these two extremes.
Perceptual quality will be optimal somewhere in between the range's extremes.
.
.TP
.B vrc_eq=<equation>
main ratecontrol equation
.RE
.RSs
.IPs "1\ \ \ \ "
constant bitrate
.IPs "tex\ \ "
constant quality
.IPs 1+(tex/\:avgTex-1)*qComp
approximately the equation of the old ratecontrol code
.IPs tex^qComp