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fixes
git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@7993 b3059339-0415-0410-9bf9-f77b7e298cf2
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@ -92,20 +92,20 @@
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<H4>DVD structure</H4>
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<P>DVD disks use all 2048 b/s sectors with ecc/crc. They usually have an UDF
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filesystem on a single track, containing various files (small .IFO and .BUK
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files and big (1GB) .VOB files). They are real files and can be copied/played
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from a mounted file system of an unencrypted DVD.</P>
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filesystem on a single track, containing various files (small .IFO and .BUK
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files and big (1GB) .VOB files). They are real files and can be copied/played
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from a mounted file system of an unencrypted DVD.</P>
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<P>The .IFO files contain the movie navigation informations (chapter/title/angle
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map, language table, etc) and is needed to read and interpret the .VOB content
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(movie). The .BUK files are backups of them. They use <B>sectors</B> everywhere,
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so you need to use raw addressing of sectors of the disc to implement DVD
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navigation. It's also needed to decrypt the content.</P>
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map, language table, etc) and is needed to read and interpret the .VOB content
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(movie). The .BUK files are backups of them. They use <B>sectors</B> everywhere,
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so you need to use raw addressing of sectors of the disc to implement DVD
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navigation. It's also needed to decrypt the content.</P>
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<P>The whole old-style DVD support with libcss needs therefore a mounted DVD
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filesystem and a raw sector-based access to the device. Unfortunately you must
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be root (under Linux) to get the sector address of a file. You got the
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following choices:</P>
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filesystem and a raw sector-based access to the device. Unfortunately you must
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be root (under Linux) to get the sector address of a file. You got the
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following choices:</P>
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<UL>
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<LI>Force the user to be root or use a suid-root mplayer binary.</LI>
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@ -119,17 +119,17 @@ following choices:</P>
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</UL>
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<P>Sometimes /dev/dvd can't be read by users, so the libdvdread authors
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implemented an emulation layer which transfers sector addresses to
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filenames+offsets, to emulate raw access on the top of a mounted filesystem
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or even on a hard disk.</P>
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implemented an emulation layer which transfers sector addresses to
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filenames+offsets, to emulate raw access on the top of a mounted filesystem
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or even on a hard disk.</P>
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<P>libdvdread even accepts the mountpoint instead of the device name for raw
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access and checks in <CODE>/proc/mounts</CODE> to get the device name. It was
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developed for Solaris, where device names are dynamically allocated.</P>
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access and checks in <CODE>/proc/mounts</CODE> to get the device name. It was
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developed for Solaris, where device names are dynamically allocated.</P>
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<P>The default DVD device is <CODE>/dev/dvd</CODE>. If your setup differs,
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make a symlink, or specify the correct device on the command line with the
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<CODE>-dvd-device</CODE> option.</P>
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make a symlink, or specify the correct device on the command line with the
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<CODE>-dvd-device</CODE> option.</P>
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<H4>DVD authentication</H4>
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@ -146,22 +146,22 @@ make a symlink, or specify the correct device on the command line with the
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of ioctls and various key exchanges, crypto stuff) and is used to encrypt
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the title and disk keys before sending them over the unprotected bus
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(to prevent eavesdropping). The bus key is needed to get and predecrypt the
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crypted disk key.
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crypted disk key.</LI>
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<LI><B>cached key:</B> MPlayer looks for eventually already cracked
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title keys which are stored in the <CODE>~/.mplayer/DVDKeys</CODE> directory
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(fast ;).</LI>
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<LI><B>key:</B> If no cached key is available, MPlayer tries to
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decrypt the disk key with a set of included player keys.
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decrypt the disk key with a set of included player keys.</LI>
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<LI><B>disk:</B> If the key method fails (e.g. no included player keys),
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MPlayer will crack the disk key using a brute force algorithm.
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This process is CPU intensive and requires 64 MB of memory (16M 32bit
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entries hash table) to store temporary data. This method should always
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work (slow).</LI>
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<LI><B>title request:</B>With the disk key MPlayer requests the crypted title
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<LI><B>title request:</B> With the disk key MPlayer requests the crypted title
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keys, which are inside <I>hidden sectors</I> using <CODE>ioctl()</CODE>.
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The region protection of RPC-2 drives is performed in this step and may
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fail on such drives. If it succeeds, the title keys will be decrypted with
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the bus and disk key.
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the bus and disk key.</LI>
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<LI><B>title:</B> This method is used if the title request failed and does
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not rely on any key exchange with the DVD drive. It uses a crypto attack to
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guess the title key directly (by finding a repeating pattern in the
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@ -189,9 +189,9 @@ make a symlink, or specify the correct device on the command line with the
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<H2><A NAME="vcd">4.3 VCD playback</A></H2>
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<P>For the complete list of available options, please read the man page.
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The Syntax for a standard Video CD (VCD) is as followed:
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<CODE>mplayer -vcd <track> [-cdrom-device <device>]</CODE>.<BR>
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Example: <CODE>mplayer -vcd 2 -cdrom-device /dev/hdc</CODE></P>
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The Syntax for a standard Video CD (VCD) is as followed:
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<CODE>mplayer -vcd <track> [-cdrom-device <device>]</CODE>.<BR>
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Example: <CODE>mplayer -vcd 2 -cdrom-device /dev/hdc</CODE></P>
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<H4>VCD structure</H4>
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@ -214,23 +214,23 @@ Example: <CODE>mplayer -vcd 2 -cdrom-device /dev/hdc</CODE></P>
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<P>About .DAT files:</P>
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<P>The ~600 MB file visible on the first track of the mounted vcd isn't a real
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file! It's a so called iso gateway, created to allow Windows to handle such
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tracks (Windows doesn't allow raw device access to applications at all).
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Under linux, you cannot copy or play such files (they contain garbage).
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Under Windows it is possible as its iso9660 driver emulates the raw reading of
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tracks in this file. To play a .DAT file you need a kernel driver which can be
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found in the Linux version of PowerDVD. It has a modified iso9660 filesystem
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(vcdfs/isofs-2.4.X.o) driver, which is able to emulate the
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raw tracks through this shadow .DAT file. If you mount the disc using their
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driver, you can copy and even play .DAT files with mplayer. But it <B>won't
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work</B> with the standard iso9660 driver of the kernel! It is recommended to
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use the <CODE>-vcd</CODE> option instead. Alternate options for VCD copy are
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the new cdfs kernel driver (shows CD <I>sessions</I> as image files) and
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cdrdao (a bit-to-bit cd grabber/copier application).</P>
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file! It's a so called iso gateway, created to allow Windows to handle such
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tracks (Windows doesn't allow raw device access to applications at all).
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Under linux, you cannot copy or play such files (they contain garbage).
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Under Windows it is possible as its iso9660 driver emulates the raw reading of
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tracks in this file. To play a .DAT file you need a kernel driver which can be
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found in the Linux version of PowerDVD. It has a modified iso9660 filesystem
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(vcdfs/isofs-2.4.X.o) driver, which is able to emulate the
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raw tracks through this shadow .DAT file. If you mount the disc using their
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driver, you can copy and even play .DAT files with mplayer. But it <B>won't
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work</B> with the standard iso9660 driver of the kernel! It is recommended to
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use the <CODE>-vcd</CODE> option instead. Alternate options for VCD copy are
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the new cdfs kernel driver (shows CD <I>sessions</I> as image files) and
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cdrdao (a bit-to-bit cd grabber/copier application).</P>
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<P>The default VCD device is <CODE>/dev/cdrom</CODE>. If your setup differs,
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make a symlink, or specify the correct device on the command line with the
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<CODE>-cdrom-device</CODE> option.</P>
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make a symlink, or specify the correct device on the command line with the
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<CODE>-cdrom-device</CODE> option.</P>
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</BODY>
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</HTML>
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@ -61,7 +61,7 @@
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<LI><A HREF="formats.html#film">2.1.1.10 FILM files</A></LI>
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<LI><A HREF="formats.html#roq">2.1.1.11 RoQ files</A></LI>
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<LI><A HREF="formats.html#ogg">2.1.1.12 OGG/OGM files</A></LI>
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<LI><A HREF="formats.html#sdp">2.1.1.12 SDP files</A></LI>
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<LI><A HREF="formats.html#sdp">2.1.1.13 SDP files</A></LI>
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</UL>
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</LI>
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<LI><A HREF="formats.html#audio_formats">2.1.2 Audio formats</A>
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