Hello,
mpeg2enc.1 gives wrong long option names. AFAIK both
quantization/quantize and quantisation/quantise are correct
spellings; but as practice and
$ mpeg2enc -h 2>&1 | grep quanti
--quantisation|-q num
Image data quantisation factor [1..31] (1 is best quality, no default)
When quantisation is set variable bit-rate encoding is activated and
--quantisation-reduction|-Q num
Max. quantisation reduction for highly active blocks
Luma variance below which quantisation boost (-Q) is used
[0.0..2.0] Reduce hf resolution (increase quantization) by num (default:
0.0)
Request custom or userspecified (from a file) quantization matrices
show, only 1 spelling works as long option.
Patch attached.
c
--
_B A U S T E L L E N_ lesen! --->> <http://www.blacktrash.org/baustellen.html>
--- docs/mpeg2enc.1.orig 2006-01-24 03:16:57.000000000 +0100
+++ docs/mpeg2enc.1 2006-07-06 03:05:49.000000000 +0200
@@ -18,11 +18,11 @@
.IR video_buf_size_kB ]
.RB [ -T | --target-still-size
.IR still_size_kB ]
-.RB [ -q | --quantization
-.IR quantization ]
+.RB [ -q | --quantisation
+.IR quantisation ]
.RB [ -r | --motion-search-radius
.IR motion_search_radius ]
-.RB [ -Q | --quantization-reduction
+.RB [ -Q | --quantisation-reduction
.IR \-4.0..5.0 ]
.RB [ -X | --quant-reduction-max-var
.IR 0.0 .. 2500.0]
@@ -224,7 +224,7 @@
.PP
.BR -K|--custom-quant-matrices \fBkvcd\fP | \fBtmpgenc\fP | \fBdefault\fP |
\fBhi-res\fP | \fBfile=\fPinputfile | \fBhelp\fP
.PP
-Specify which quantization matrices to use instead of the defaults
+Specify which quantisation matrices to use instead of the defaults
(which can be specified by using "-K default"). Using "-K hi-res" is
identical to using the -H option. The value kvcd uses the Kvcd.Net
matrices from http://www.kvcd.net/; the value tmpgenc invokes the
@@ -471,9 +471,9 @@
Abort
.fi
.PP
-.BR -q|--quantization \ 1 .. 31
+.BR -q|--quantisation \ 1 .. 31
.PP
-Minimum quantization of the output stream. Quantisation controls the
+Minimum quantisation of the output stream. Quantisation controls the
precision with which image information is encoded. The lower the
number the higher the quality but the greater the required data-rate.
\fBNOTE:\fP on IA32 systems it is possible to cause artifacting by setting
@@ -487,7 +487,7 @@
to use a software decoder you'd be insane not to use variable bitrate.
.sp
If this option is set without a maximum bitrate being specified then
-quantization is fixed at the specified value. It should be noted that not
+quantisation is fixed at the specified value. It should be noted that not
specifying a bitrate is probably an error and may produce unexpected results.
.sp
For MPEG-2 streams a default of 8 is used if \fB-q\fP is not explicitly given.
@@ -563,20 +563,20 @@
Several common MPEG-1 decoders can't handle streams where less than
2 B-frames appear between I/P frames.
.PP
-.BR -Q|--quantization-reduction \ -4.0..5.0
+.BR -Q|--quantisation-reduction \ -4.0..5.0
.PP
-This flag sets the amount quantization is reduced for
+This flag sets the amount quantisation is reduced for
blocks containing large amounts of sharp image detail.
Large values produces efficient use of bits but may
cause visible artifacting around detailed sections.
With noisy source material this option may cause
a "swimming" effect on textured backgrounds as the noise cause the
-quantization of blocks to be boosted at random. The default is 0.0 (off).
+quantisation of blocks to be boosted at random. The default is 0.0 (off).
See also the \-X option.
.PP
.BR -X|--quant-reduction-max-var \ 0.0..2500.0
.PP
-Luma variance below which quantization boost (-Q) is activated.
+Luma variance below which quantisation boost (-Q) is activated.
.PP
.BR -r|--motion-search-radius \ num
.PP
@@ -602,20 +602,20 @@
These flags are useful as the speed quality trade-off is markedly
different depending on which CPU you have. On modern machines the
impact on speed is around a factor 2 on older machines a factor 3.
-The impact on quality is around 10% quantization (0.2 of a bit of
+The impact on quality is around 10% quantisation (0.2 of a bit of
precision in encoding textures). For most purposes the default
settings will be fine. However on P-III Katmai etc -4 2 -2 1 gives a
good near-optimum quality setting with reasonably speed.
.PP
.BR -N|--reduce-hf \ num
.PP
-Setting this flag adjusts the way texture detail is quantized to
+Setting this flag adjusts the way texture detail is quantised to
reduce the precision with which of high-frequency information
encoded. This is very useful for
.I mildly
noisy sources. If you have really noisy material the filtering tools
available in mjpegtools are a much better bet. The specified number
-must be in the range 0.0 to 2.0 gives the maxium quantization boost.
+must be in the range 0.0 to 2.0 gives the maxium quantisation boost.
A useful number to use would be 1.5 or 1.0.
.PP
.BR -H|--keep-hf
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