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Zr documentation updated plus some typos fixed.
Patch by rsnel@cube.dyndns.org. git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@7193 b3059339-0415-0410-9bf9-f77b7e298cf2
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diego
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@ -81,7 +81,7 @@ and options given on the command line override either. The syntax of the config
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files is 'option=<value>', everything after a '#' is considered a comment.
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Options that work without values can be enabled by setting them to 'yes' or '1'
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and disabled by setting them to 'no' or '0'. Even suboptions can be specified
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this way.
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in this way.
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.I EXAMPLE:
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.br
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@ -384,7 +384,7 @@ codecs.conf.
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\-ac hwac3 enable hardware AC3 passthrough
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(see documentation)
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\-ac vorbis use libvorbis
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\-ac ffmp3 use ffmpeg's MP3 decoder (SLOW)
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\-ac ffmp3 use FFmpeg's MP3 decoder (SLOW)
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See \-ac help for a full list of available codecs.
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.TP
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@ -393,7 +393,7 @@ Force usage of a specific audio codec family, according to its driver name
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in codecs.conf and fall back to default if it failed.
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.I EXAMPLE:
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\-afm ffmpeg use ffmpeg's libavcodec (mp1/2/3)
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\-afm ffmpeg use FFmpeg's libavcodec (mp1/2/3)
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\-afm acm use a matching Win32 codec
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See \-afm help for a full list of available drivers.
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@ -1084,9 +1084,60 @@ Specifies compression level for PNG output (-vo png)
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9 max compression
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.TP
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.B \-zr* (\-vo zr only)
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You can get a list and an explanation of available options executing
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.I mplayer \-zrhelp
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All the options that start with \-zr are specific to the zr video output
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driver.
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.TP
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.B \-zrxdoff <x display offset>, \-zrydoff <y display offset>
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If the movie is smaller than the TV screen, these options control the position
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of the movie relative to the upper left corner of the screen. The movie
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is centered by default.
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.TP
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.B \-zrvdec 1,2,4 , \-zrhdec 1,2,4
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Vertical/horizontal decimation: Ask the driver to send only every 2nd or 4th
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line/pixel of the input image to the MJPEG card and use the scaler of the
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MJPEG card to strech the image to its original size.
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.TP
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.B \-zrfd
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Force decimation: Decimation, as specified by -zrhdec and -zrvdec, only happens
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if the hardware scaler can stretch the image to its original size. Use this
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option to force decimation.
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.TP
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.B \-zrbw
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Display in black and white (for optimal performance, this option can be
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combined with the 'decode only in black and white' option for codecs
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belonging to the FFmpeg family).
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.TP
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.B \-zrquality <1\-20>
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A number from 1 to 20 representing the jpeg encoding quality. 1 gives the best
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quality and 20 gives very bad quality.
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.TP
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.B \-zrdev <device>
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Specify the device special file that belongs to your MJPEG card, by default
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this driver takes the first v4l device it can find.
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.TP
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.B \-zrnorm PAL|NTSC
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Specify norm PAL/NTSC, the default is 'no change'.
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.TP
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.B \-zrhelp
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Display a list of all -zr* options, their default values and an example of
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cinerama mode.
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.TP
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.B \-zrcrop <width>x<height>+<x offset>+<y offset>
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Select a part of the input image for display, multiple occurences of this
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option switch on cinerama mode. In cinerama mode the movie is distributed
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over more than one TV (or beamer) to create a larger screen. Options appearing
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after the n-th -zrcrop apply to the n-th MJPEG card, each card should at least
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have a -zrdev in addition to the -zrcrop. For examples, see the output of
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-zrhelp and the Zr section of the documentation.
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.SH "PLAYER OPTIONS (MPLAYER ONLY)"
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.TP
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@ -993,34 +993,85 @@ recognize <CODE>:vidix</CODE> subdevice.
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<P>This is a display-driver (<CODE>-vo zr</CODE>) for a number of MJPEG
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capture/playback cards (tested for DC10+ and Buz, and it should work for the
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LML33, the DC10). The driver works by encoding the frame to jpeg and then
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sending it to the card. For the jpeg encoding <B>libavcodec</B> is
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used, and required.</P>
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LML33 and the original DC10). The driver works by encoding the frame to jpeg
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and then sending it to the card. For the jpeg encoding <B>libavcodec</B> is
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used, and required. With the special <I>cinerama</I> mode, you can watch
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movies in true wide screen provided that you have two beamers and two
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MJPEG cards. Depending on resolution and quality settings, this driver
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may require a lot of CPU power, remember to specify <CODE>-framedrop</CODE>
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if your machine is too slow. Note: My AMD K6-2 350MHz is (with <CODE>
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-framedrop</CODE>) quite adequate for watching VCD sized material and
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downscaled movies.
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<P>This driver talks to the kernel driver available at
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<A HREF="http://mjpeg.sourceforge.net">http://mjpeg.sourceforge.net</A>, so
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you must get it working first. Then recompile <B>MPlayer</B> with
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<CODE>--enable-zr</CODE>.</P>
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you must get it working first. The presence of an MJPEG card is autodetected
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by the configure script, if autodetection fails, force detection with
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Some remarks:
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<UL>
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<LI>don't start or stop XawTV on the playback device during playback,
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it will crash your computer. It is, however, fine to <B>FIRST</B> start
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XawTV, <B>THEN</B> start <B>MPlayer</B>, wait for <B>MPlayer</B> to finish
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and <B>THEN</B> stop XawTV.</LI>
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<LI>this driver adds <CODE>-zr*</CODE> command line options. The explanation
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of these options can be viewed with <CODE>-zrhelp</CODE>. It is possible to
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crop the input frame (cut borders to make it fit or to enhance performance)
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and to do other things.</LI>
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<LI>the driver takes data in YV12 and YUY2 format, this means that some
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codecs won't work. Some old VfW (Video for Windows) codecs, for example,
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are incompatible with this driver. The error message that you will see is:
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<CODE>Sorry, selected video_out device is incompatible with this codec.
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</CODE></LI>
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<LI>OSD is currently not supported, so you won't see
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subtitles.</LI>
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</UL>
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<PRE>
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./configure --enable-zr
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</PRE>
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<P>The output can be controlled by several options, a long description of the
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options can be found in the man page, a short list of options can be
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viewed by running
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<PRE>
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mplayer -zrhelp
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</PRE>
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<P>Things like scaling and the OSD (on screen display) are not handled by
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this driver but can be done using the video filters. For example,
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suppose that you have a movie with a resolution of <CODE>512x272</CODE> and
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you want to view it fullscreen on your DC10+. There are three main
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possibilities, you may scale the movie to a width of <CODE>768</CODE>,
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<CODE>384</CODE> or <CODE>192</CODE>. For performance and quality reasons,
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I would choose to scale the movie to <CODE>384x204</CODE> using the fast
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bilinear software scaler. The commandline is
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<PRE>
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mplayer -vo zr -sws 0 -vop scale=384:204 movie.avi
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</PRE>
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<P>Cropping can be done by the <CODE>crop</CODE> filter and by
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this driver itself. Suppose that a movie is too wide for display on your
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Buz and that you want to use <CODE>-zrcrop</CODE> to make the movie less
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wide, the you would issue the following command
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<PRE>
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mplayer -vo zr -zrcrop 720x320+80+0 benhur.avi
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</PRE>
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if you want to use the <CODE>crop</CODE> filter, you would do
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<PRE>
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mplayer -vo zr -vop crop=720:320:80:0 benhur.avi
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</PRE>
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<P>Extra occurances of <CODE>-zrcrop</CODE> invoke <I>cinerama</I> mode, i.e.
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you can distribute the movie over several TV's or beamers to create a larger
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screen. Suppose you have two beamers. The left one is connected to your Buz
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at <CODE>/dev/video1</CODE> and the right one is connected to your DC10+ at
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<CODE>/dev/video0</CODE>. The movie has a resolution of <CODE>704x288</CODE>.
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Suppose also that you want the right beamer in black and white and that
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the right beamer should have jpeg frames at quality <CODE>10</CODE>,
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then you would issue the following command
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<PRE>
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mplayer -vo zr -zrdev /dev/video0 -zrcrop 352x288+352+0 -zrxdoff 0 -zrbw \
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-zrcrop 352x288+0+0 -zrdev /dev/video1 -zrquality 10 movie.avi
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</PRE>
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<P>You see that the options appearing before the second <CODE>-zrcrop</CODE>
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only apply to the DC10+ and that the options after the second
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<CODE>-zrcrop</CODE> apply to the Buz. The maximum number of MJPEG cards
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participating in <I>cinerama</I> is four, so you can buid a <CODE>2x2</CODE>
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vidiwall.</P>
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<P>Finally an important remark: Do not start or stop XawTV on the playback
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device during playback, it will crash your computer. It is, however, fine to
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<B>FIRST</B> start XawTV, <B>THEN</B> start <B>MPlayer</B>, wait for
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<B>MPlayer</B> to finish and <B>THEN</B> stop XawTV.</P>
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<H4><A NAME="dvb">2.3.1.16 DVB</A></H4>
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