[MPlayer-DOCS] CVS: main/DOCS/man/en mplayer.1,1.1009,1.1010
Loren Merritt CVS
syncmail at mplayerhq.hu
Fri Jun 17 10:26:14 CEST 2005
CVS change done by Loren Merritt CVS
Update of /cvsroot/mplayer/main/DOCS/man/en
In directory mail:/var2/tmp/cvs-serv7750/DOCS/man/en
Modified Files:
mplayer.1
Log Message:
sync to x264 rev264 (lossless)
Index: mplayer.1
===================================================================
RCS file: /cvsroot/mplayer/main/DOCS/man/en/mplayer.1,v
retrieving revision 1.1009
retrieving revision 1.1010
diff -u -r1.1009 -r1.1010
--- mplayer.1 16 Jun 2005 09:03:11 -0000 1.1009
+++ mplayer.1 17 Jun 2005 08:26:11 -0000 1.1010
@@ -7851,11 +7851,12 @@
at significant reduction in quality.
.
.TP
-.B qp_constant=<1\-51>
+.B qp_constant=<0\-51>
This selects the quantizer to use for P-frames.
I- and B-frames are offset from this value by ip_factor and pb_factor, respectively.
20\-40 is a useful range (default: 26).
Lower values result in better fidelity, but higher bitrates.
+0 is lossless.
Note that quantization in H.264 works differently from MPEG-1/2/4:
H.264's quantization parameter (QP) is on a logarithmic scale.
The mapping is approximately H264QP = 12 + 6*log2(MPEGQP).
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