[MPlayer-DOCS] [PATCH] lavc opts update

Loren Merritt lorenm at u.washington.edu
Sat Nov 13 04:04:06 CET 2004


vb_strategy does not cause bitrate misprediction, but works only on the 
first pass.
keyint=0 means all I-frames, not no I-frames.
mbqmin / mbqmax no longer do anything.

--Loren Merritt
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Index: mplayer.1
===================================================================
RCS file: /cvsroot/mplayer/main/DOCS/man/en/mplayer.1,v
retrieving revision 1.803
diff -u -r1.803 mplayer.1
--- mplayer.1	11 Nov 2004 02:12:33 -0000	1.803
+++ mplayer.1	13 Nov 2004 02:41:48 -0000
@@ -5365,15 +5365,15 @@
 .
 .TP
 .B mbqmin=<1\-31>
-minimum macroblock quantizer (pass\ 1/\:2) (default: 2)
+obsolete, use vqmin
 .
 .TP
 .B mbqmax=<1\-31>
-maximum macroblock quantizer (pass\ 1/\:2) (default: 31)
+obsolete, use vqmax
 .
 .TP
 .B vqdiff=<1\-31>
-maximum quantizer difference between I- or P-frames (pass\ 1/\:2) (default: 3)
+maximum quantizer difference between consecutive I- or P-frames (pass\ 1/\:2) (default: 3)
 .
 .TP
 .B vmax_b_frames=<0\-4>
@@ -5462,9 +5462,10 @@
 .B keyint=<0\-300>
 maximum interval between keyframes in frames (default: 250 or one
 keyframe every ten seconds in a 25fps movie).
-Keyframes are needed for seeking as seeking is only possible to a keyframe but
-keyframes need more space than other frames so larger numbers here mean
-slightly smaller files, but less precise seeking, 0 means no keyframes.
+Keyframes are needed for seeking as seeking is only possible to a keyframe, but
+keyframes need more space than other frames, so larger numbers here mean
+slightly smaller files but less precise seeking.
+0 is equivalent to 1, which makes every frame a keyframe.
 Values >300 are not recommended as the quality might be bad depending upon
 decoder, encoder and luck.
 For a strict MPEG1/\:2/\:4 compliance this would have to be <=132.
@@ -5479,14 +5480,13 @@
 .
 .TP
 .B vb_strategy=<0\-1>
-strategy to choose between I/\:P/\:B-frames (pass\ 2):
+strategy to choose between I/\:P/\:B-frames (pass\ 1):
 .PD 0
 .RSs
 .IPs 0
 Always use the maximum number of B-frames (default).
 .IPs 1
 Avoid B-frames in high motion scenes.
-This will cause bitrate misprediction.
 .RE
 .PD 1
 .


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