2001-08-21 21:01:54 +00:00
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2001-08-24 18:48:13 +00:00
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<P><B><A NAME=4.1>4.1. CD-ROM drives</A></B></P>
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<P>From Linux documentation:</P>
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<P>Some CDROM drives are capable of changing their head-speed. There are several
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reasons for changing the speed of a CDROM drive. Badly pressed CDROMs may
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benefit from less-than-maximum head rate. Modern CDROM drives can obtain very
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high head rates (up to 24-times is common). It has been reported that these
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drives can make reading errors at these high speeds, reducing the speed can
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prevent data loss in these circumstances. Finally, some of these drives can
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make an annoyingly loud noise, which a lower speed may reduce.</P>
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<P>The recommended way to do it is with a program called 'setcd' . It's kinda
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old, but won't be too hard to find on the Net. (UPDATE : new hdparm
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has an option for this !)
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Use it with :</P>
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<P> <CODE>setcd -x [speed] [cdrom device]</CODE></P>
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<P>Also you can try:</P>
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<P> <CODE>echo current_speed:4 >/proc/ide/[cdrom device]/settings</CODE></P>
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<P>but you'll need root privileges. I use following command too:</P>
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<P> <CODE>echo file_readahead:2000000 >/proc/ide/[cdrom device]/settings</CODE></P>
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<P>for 2MB prefetched reading from the file (it's useful for scratched CDROMs).
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It's recommended that you tuneup your CDROM drive also with hdparm:</P>
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<P> <CODE>hdparm -d1 -a8 -u1 (cdrom device)</CODE></P>
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<P>to enable using DMA access, readahead, and IRQ unmasking.
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(if you don't understand these, *read the hdparm manpage*)</P>
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<P>Please refer to "<CODE>/proc/ide/[cdrom device]/settings</CODE>" for fine-tuning your
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CDROM.</P>
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<P><B><A NAME=4.2>4.2. DVD playback</A></B></P>
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<P>Yes, the real DVD support has been arrived. You don't need to play VOB files
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manually from disk thinking of the purpose of a file in the video_ts
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directory, you don't need worry it it's an encrypted disk or not (in old
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<B>MPlayer</B> you had to put '-dvdauth /dev/dvd' into the command line in case
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of encrypted discs), and you don't need even mount your disk to be able to
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play :)</P>
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<P>IMPORTANT NOTE: please _DO_NOT_ require further features for DVD playback.
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This is the first version of some real DVD support inside <B>MPlayer</B> and
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we're busy with hunting bugs and implementing basic DVD player features.</P>
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<P><B>MPlayer</B> uses libdvdread which has got built in support for IFO parsing,
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reading navi blocks and doing authentication/descrambling. libdvdread
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use the good old libcss to the latter tasks. So you will need libcss and
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libdvdread downloaded, compiled and installed BEFORE you run ./configure
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script of <B>MPlayer</B> which will autodetect libdvdread for you in this way.</P>
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<UL>
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<LI><P><B>Download source of libdvdread and libcss.</B></P>
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<P><I>You can download them from
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<A HREF="http://www.dtek.chalmers.se/groups/dvd">http://www.dtek.chalmers.se/groups/dvd</A>
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(click 'download' in the menu at the left, and you can find libcss and
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libdvdread in a table).</I></P></LI>
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<LI><P><B>Compile and install libcss THEN libdvdread.</B></P>
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<P><I>Read documentation of these packages to do this step easily.</I></P></LI>
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<LI><P><B>Recompile MPlayer.</B></P>
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<P><I>Run <CODE>./configure</CODE>. If you install libdvdread correctly, ./configure
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says something similar:<BR><CODE>Checking for DVDread support ... yes</CODE><BR>
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(Of course you can put your favourite configure options into the command
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line when you run ./configure). That's it! Say: <CODE>make</CODE>, then <CODE>make install</CODE>.</I></P></LI>
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</UL>
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<P>Of course after installing libcss and libdvdread you don't need recompile
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them at each time when you want to recompile <B>MPlayer</B> (from a new CVS version
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for example) since the needed packages have already been installed on your
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machine.</P>
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<P><B>Using MPlayer to play DVDs:</B></P>
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<TABLE BORDER=0 WIDTH=100%>
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<TD VALIGN=top>-dvd <title_id> </TD>
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<TD>Enables DVD support and selects title.</TD><TR>
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<TD VALIGN=top>-chapter <chapter_id> </TD>
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<TD>Selects DVD chapter (default: play from chapter 1)</TD><TR>
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<TD VALIGN=top>-dvdangle <chapter_id> </TD>
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<TD>Selects camera angle (default: 1)</TD><TR>
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</TABLE>
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<P>Default device is <CODE>/dev/dvd</CODE>, you can change it in config.h
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(compile time option), or you can specify it as a filename for <B>MPlayer</B>:
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</P>
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<P> <CODE>mplayer -dvd 1 /dev/dvd</CODE></P>
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<P> <CODE>mplayer -dvd 2 -chapter 5 -dvdangle 2</CODE></P>
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<P><B><A NAME=4.3>4.3. DVD playback FAQ</A></B></P>
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<TABLE BORDER=0 ALIGN=left WIDTH=100%>
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<TD> </TD><TD VALIGN=top>Q:</TD><TD WIDTH=100%><B>
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I have some problem not mentioned here ...
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</B></TD><TR><TD></TD><TD VALIGN=top>A:</TD><TD>
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Read section <A HREF="#4.2">DVD playback</A> as well.
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</TD><TR><TD COLSPAN=3> </TD><TR>
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<TD></TD><TD VALIGN=top>Q:</TD><TD WIDTH=100%><B>
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How can I actually watch DVD with MPlayer?
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</B></TD><TR><TD></TD><TD VALIGN=top>A:</TD><TD>
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See the latter question and answer.
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</TD><TR><TD COLSPAN=3> </TD><TR>
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<TD></TD><TD VALIGN=top>Q:</TD><TD WIDTH=100%><B>
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Can I compile libdvdread and libcss for example on my sweet Sparc/Solaris?
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</B></TD><TR><TD></TD><TD VALIGN=top>A:</TD><TD>
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Who knows ... Please test it and send feedback. But it's said that it
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should work. Please refer documentation of libdvdread and its homepage
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as well. We're not authors of libdvdread.
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</TD><TR><TD COLSPAN=3> </TD><TR>
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<TD></TD><TD VALIGN=top>Q:</TD><TD WIDTH=100%><B>
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What about subtitles? Can MPlayer decode them?
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</B></TD><TR><TD></TD><TD VALIGN=top>A:</TD><TD>
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Yes it can (or at least it would be able to) but there is now DVD subtitle
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displaying functionality inside <B>MPlayer</B> (DVD subs are stored as images,
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not text!). However it's a planned feature (at the time of libvo2).
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</TD><TR><TD COLSPAN=3> </TD><TR>
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<TD></TD><TD VALIGN=top>Q:</TD><TD WIDTH=100%><B>
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I've got no sound / bad sound (Spanish audio and other ugly things).
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</B></TD><TR><TD></TD><TD VALIGN=top>A:</TD><TD>
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<B>MPlayer</B> currently does not use all of information of IFO blocks from DVD.
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You can adjust the right DVD audio stream with: '-aid 128' command line
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option, where 128 is the stream id of requested audio stream. You can
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experience with numbers of 128,129,... and so on. Of course this problem
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will be solved in the future.
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</TD><TR><TD COLSPAN=3> </TD><TR>
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<TD></TD><TD VALIGN=top>Q:</TD><TD WIDTH=100%><B>
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There is some strange effect (interlace like thing) especially when fast
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moving objects are shown in the movie.
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</B></TD><TR><TD></TD><TD VALIGN=top>A:</TD><TD>
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Known problem, we try to fix it later (when we switch to libvo2).
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</TD><TR><TD COLSPAN=3> </TD><TR>
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<TD></TD><TD VALIGN=top>Q:</TD><TD WIDTH=100%><B>
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How can I set the region code of my DVD-Drive ? I don't have windows!
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</B></TD><TR><TD></TD><TD VALIGN=top>A:</TD><TD>
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Use the 'regionset' tool:
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http://www.linuxtv.org/download/dvd/dvd_disc_20000215.tar.gz
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</TD><TR><TD COLSPAN=3> </TD><TR>
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<TD></TD><TD VALIGN=top>Q:</TD><TD WIDTH=100%><B>
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So MPlayer can play DVDs? Then it must use DeCSS! You are under arrest
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under the XYZ#$ paragraph of the--
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</B></TD><TR><TD></TD><TD VALIGN=top>A:</TD><TD>
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Get back asshole, there is no DeCSS code in <B>MPlayer</B>. <B>MPlayer</B> uses libdvdread
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by linking against it, and libdvdread uses libcss by dynamic loading it.
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</TD><TR><TD COLSPAN=3> </TD><TR>
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<TD></TD><TD VALIGN=top>Q:</TD><TD WIDTH=100%><B>
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Do I need to be (setuid) root/setuid fibmap_mplayer to be able to play DVD?
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</B></TD><TR><TD></TD><TD VALIGN=top>A:</TD><TD>
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No, you don't. This is the past :) However of course you must have got
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the proper rights to the DVD device driver entry (in /dev).
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</TD><TR><TD COLSPAN=3> </TD><TR>
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<TD></TD><TD VALIGN=top>Q:</TD><TD WIDTH=100%><B>
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How can I ... (insert some expectable DVD player feature here)?
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</B></TD><TR><TD></TD><TD VALIGN=top>A:</TD><TD>
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The current implementation is the first implementation of some real DVD
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player functionality. First, we would like to target existing bugs and
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basic features before implementing new features.
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</TD><TR><TD COLSPAN=3> </TD><TR>
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<TD></TD><TD VALIGN=top>Q:</TD><TD WIDTH=100%><B>
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Where can I get libdvdread and libcss packages from?
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</B></TD><TR><TD></TD><TD VALIGN=top>A:</TD><TD>
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From the site of Ogle:
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<A HREF="http://www.dtek.chalmers.se/groups/dvd">http://www.dtek.chalmers.se/groups/dvd</A>.
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</TD><TR><TD COLSPAN=3> </TD><TR>
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</TABLE>
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2001-08-21 21:01:54 +00:00
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</BODY>
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</HTML>
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