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| author | gpoirier <gpoirier@b3059339-0415-0410-9bf9-f77b7e298cf2> | 2007-01-07 10:39:00 +0000 |
|---|---|---|
| committer | gpoirier <gpoirier@b3059339-0415-0410-9bf9-f77b7e298cf2> | 2007-01-07 10:39:00 +0000 |
| commit | 2abf85b1dfe558333d648d905f8b1795f77ca02f (patch) | |
| tree | 73d9ea63e24bdac3f5654c6852d9f2312cf369d5 /DOCS | |
| parent | aee88f659dd63120fe1d05d2894a6e3ae7c18d48 (diff) | |
| download | mpv-2abf85b1dfe558333d648d905f8b1795f77ca02f.tar.bz2 mpv-2abf85b1dfe558333d648d905f8b1795f77ca02f.tar.xz | |
clarify a few things about the interaction between *cmp and mbd options
fix encoding example that featured a option that didn't have any effect (because of the interaction mentioned above)
git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@21848 b3059339-0415-0410-9bf9-f77b7e298cf2
Diffstat (limited to 'DOCS')
| -rw-r--r-- | DOCS/man/en/mplayer.1 | 13 | ||||
| -rw-r--r-- | DOCS/xml/en/encoding-guide.xml | 6 |
2 files changed, 13 insertions, 6 deletions
diff --git a/DOCS/man/en/mplayer.1 b/DOCS/man/en/mplayer.1 index 91b4dcd5e7..d4c171a4ec 100644 --- a/DOCS/man/en/mplayer.1 +++ b/DOCS/man/en/mplayer.1 @@ -7304,14 +7304,20 @@ so quality may be low. motion estimation search range (default: 0 (unlimited)) . .TP -.B mbd=<0\-2> +.B mbd=<0\-2> (see also *cmp, qpel) Macroblock decision algorithm (high quality mode), encode each macro block in all modes and choose the best. This is slow but results in better quality and file size. +When mbd is set to 1 or 2, the value of mbcmp is ignored when comparing +macroblocks. +If any comparison setting (precmp, subcmp, cmp, or mbcmp) is nonzero, +however, a slower but better half-pel motion search will be used, +regardless of what mbd is set to. +If qpel is set, quarter-pel motion search will be used regardless. .PD 0 .RSs .IPs 0 -Use mbcmp (default). +Use comparison function given by mbcmp (default). .IPs 1 Select the MB mode which needs the fewest bits (=vhq). .IPs 2 @@ -8118,7 +8124,8 @@ This seems only useful for high bitrate encodings. . .TP .B mbcmp=<0\-2000> -Sets the comparison function for the macroblock decision, only used if mbd=0. +Sets the comparison function for the macroblock decision, has only +an effect if mbd=0. .PD 0 .RSs .IPs "0 (SAD)" diff --git a/DOCS/xml/en/encoding-guide.xml b/DOCS/xml/en/encoding-guide.xml index c3ebb8bb7d..d5e1906c20 100644 --- a/DOCS/xml/en/encoding-guide.xml +++ b/DOCS/xml/en/encoding-guide.xml @@ -2953,13 +2953,13 @@ amounts of detail, so we pick 2400Kbit for our bitrate. We are now ready to do the two pass encode. Pass one: <screen> mencoder dvd://1 -ofps 24000/1001 -oac copy -o <replaceable>Harry_Potter_2.avi</replaceable> -ovc lavc \ - -lavcopts vcodec=mpeg4:vbitrate=2400:v4mv:mbd=2:trell:cmp=3:subcmp=3:mbcmp=3:autoaspect:vpass=1 \ + -lavcopts vcodec=mpeg4:vbitrate=2400:v4mv:mbd=2:trell:cmp=3:subcmp=3:autoaspect:vpass=1 \ -vf pullup,softskip,crop=720:352:0:62,hqdn3d=2:1:2 </screen> And pass two is the same, except that we specify <option>vpass=2</option>: <screen> mencoder dvd://1 -ofps 24000/1001 -oac copy -o <replaceable>Harry_Potter_2.avi</replaceable> -ovc lavc \ - -lavcopts vcodec=mpeg4:vbitrate=2400:v4mv:mbd=2:trell:cmp=3:subcmp=3:mbcmp=3:autoaspect:vpass=2 \ + -lavcopts vcodec=mpeg4:vbitrate=2400:v4mv:mbd=2:trell:cmp=3:subcmp=3:autoaspect:vpass=2 \ -vf pullup,softskip,crop=720:352:0:62,hqdn3d=2:1:2 </screen> </para> @@ -2968,7 +2968,7 @@ mencoder dvd://1 -ofps 24000/1001 -oac copy -o <replaceable>Harry_Potter_2.avi</ The options <option>v4mv:mbd=2:trell</option> will greatly increase the quality at the expense of encoding time. There is little reason to leave these options out when the primary goal is quality. The options -<option>cmp=3:subcmp=3:mbcmp=3</option> select a comparison function that +<option>cmp=3:subcmp=3</option> select a comparison function that yields higher quality than the defaults. You might try experimenting with this parameter (refer to the man page for the possible values) as different functions can have a large impact on quality depending on the |