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<TITLE>CD, DVD, VCD - MPlayer - The Movie Player for Linux</TITLE>
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<H2><A NAME="drives">4.1 CD/DVD drives</A></H2>
<P>Linux documentation excerpt:</P>
<P>Modern CD-ROM drives can attain very high head speeds, yet some CD-ROM drives
are capable of running at reduced speeds. There are several reasons that might
make you consider changing the speed of a CD-ROM drive:</P>
<UL>
<LI>There have been reports of read errors at these high speeds, especially
with badly pressed CD-ROMs. Reducing the speed can prevent data loss under
these circumstances.</LI>
<LI>Many CD-ROM drives are annoyingly loud, a lower speed may reduce the
noise.</LI>
</UL>
<P>You can reduce the drive speed with hdparm or a program called setcd.
It works like this:</P>
<P> <CODE>hdparm -E [speed] [cdrom device]</CODE></P>
<P> <CODE>setcd -x [speed] [cdrom device]</CODE></P>
<P>You can also try</P>
<P> <CODE>echo current_speed:4 > /proc/ide/[cdrom device]/settings</CODE></P>
<P>but you will need root privileges. The following command may also help:</P>
<P> <CODE>echo file_readahead:2000000 > /proc/ide/[cdrom device]/settings</CODE></P>
<P>This sets prefetched file reading to 2MB, which helps with scratched CD-ROMs.
It is recommended that you also tune your CD-ROM drive with hdparm:</P>
<P> <CODE>hdparm -d1 -a8 -u1 (cdrom device)</CODE></P>
<P>This enables DMA access, read-ahead, and IRQ unmasking (read the hdparm man
page for a detailed explanation).</P>
<P>Please refer to "<CODE>/proc/ide/[cdrom device]/settings</CODE>" for
fine-tuning your CD-ROM.</P>
<H2><A NAME="dvd">4.2 DVD playback</A></H2>
<P><B>MPlayer</B> uses <CODE>libdvdread</CODE> and <CODE>libdvdcss</CODE> for
DVD decryption and playback. These two libraries are contained in the
<CODE>libmpdvdkit/</CODE> subdirectory of the <B>MPlayer</B> source tree, you
do not have to install them separately. We opted for this solution because
we had to fix a libdvdread bug, and apply a patch which adds
<B>cracked CSS keys caching support</B> to libdvdcss. This results in a large
speed increase because the keys do not have to be cracked every time before
playing. The cracked keys are stored in the
<CODE>~/.mplayer/DVDKeys</CODE> directory.</P>
<P><B>MPlayer</B> can also use system-wide <CODE>libdvdread</CODE> and
<CODE>libdvdcss</CODE> libraries, but this solution is <B>not</B> recommended,
as it can result in bugs, library incompatibilities, and slower speed.</P>
<P>Support for DVD navigation via <CODE>dvdnav</CODE> is being worked on, but
not finished yet.</P>
<H4>Old-style DVD support - OPTIONAL</H4>
<P>Useful if you want to play encoded VOBs from hard disk. Compile and
install <B>libcss</B> 0.0.1 (not newer) for this (If <B>MPlayer</B> fails to
detect it, use the <CODE>-csslib /path/to/libcss.so</CODE> option).</P>
<P>For the complete list of available options, please read the man page.</P>
<H2><A NAME="vcd">4.3 VCD playback</A></H2>
<P>Playing standard Video CDs:</P>
<P><CODE>mplayer -vcd <track> [-cdrom-device device]</CODE></P>
<P>Examples:<BR>
<CODE>mplayer -vcd 1<BR>
mplayer -fs -vcd 2 -cdrom-device /dev/hdc</CODE></P>
Notes:
<UL>
<LI>Do <B>not</B> mount VCDs to play the DAT files directly! It may work
under Windows but will not under Linux. You have to play VCDs with the
<CODE>-vcd</CODE> option.</LI>
<LI>VCD disks usually have 2 tracks: a data track (containing autostart
Windows playback program, karaoke data etc) and a mode-2 track (the movie).
So try <CODE>-vcd 2</CODE> first.</LI>
<LI>The default VCD device is <CODE>/dev/cdrom</CODE>. If your setup differs,
make a symlink, or specify the correct device on the command line with the
<CODE>-cdrom-device</CODE> option.</LI>
</UL>
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