From 5929c7c83565be103f9df14d8db22506e72e5f61 Mon Sep 17 00:00:00 2001
From: diego
You can reduce the drive speed with hdparm or a program called setcd. - It works like this:
+You can reduce the speed of IDE CD-ROM drives with hdparm
or a
+ program called setcd
. It works like this:
hdparm -E [speed] [cdrom device]
This sets prefetched file reading to 2MB, which helps with scratched CD-ROMs. If you set it to too high, the drive will continuously spin up and down, and will dramatically decrease the performance. - It is recommended that you also tune your CD-ROM drive with hdparm:
+ It is recommended that you also tune your CD-ROM drive with +hdparm
:
hdparm -d1 -a8 -u1 (cdrom device)
This enables DMA access, read-ahead, and IRQ unmasking (read the hdparm man - page for a detailed explanation).
+This enables DMA access, read-ahead, and IRQ unmasking (read the
+ hdparm
man page for a detailed explanation).
Please refer to "/proc/ide/[cdrom device]/settings
" for
fine-tuning your CD-ROM.
SCSI drives do not have a uniform way of setting these parameters (Do you + know one? Tell us!) There is a tool that works for + Plextor SCSI drives.
+FreeBSD:
Speed: cdcontrol [-f device] speed [speed]
libmpdvdkit2/
subdirectory of the MPlayer 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 cracked CSS
- keys caching support to libdvdcss. This results in a large speed increase
- because the keys do not have to be cracked every time before playing.
+ we had to fix a libdvdread
bug and apply a patch which adds
+ cracked CSS keys caching support to libdvdcss. This results in a large
+ speed increase because the keys do not have to be cracked every time before
+ playing.
MPlayer can also use system-wide libdvdread
and
libdvdcss
libraries, but this solution is not recommended,
- as it can result in bugs, library incompatibilities, and slower speed.
Support for DVD navigation via dvdnav
was being worked on, but
- it was never finished properly and is therefore not recommended!
DVD disks use all 2048 b/s sectors with ecc/crc. They usually have an UDF +
DVD disks have 2048 bytes per sector with ECC/CRC. They usually have an UDF filesystem on a single track, containing various files (small .IFO and .BUK files and big (1GB) .VOB files). They are real files and can be copied/played - from a mounted file system of an unencrypted DVD.
+ from the mounted filesystem of an unencrypted DVD. -The .IFO files contain the movie navigation informations (chapter/title/angle - map, language table, etc) and is needed to read and interpret the .VOB content - (movie). The .BUK files are backups of them. They use sectors everywhere, - so you need to use raw addressing of sectors of the disc to implement DVD - navigation. It's also needed to decrypt the content.
+The .IFO files contain the movie navigation information (chapter/title/angle + map, language table, etc) and are needed to read and interpret the .VOB + content (movie). The .BUK files are backups of them. They use sectors + everywhere, so you need to use raw addressing of sectors of the disc to + implement DVD navigation or decrypt the content.
-The whole old-style DVD support with libcss needs therefore a mounted DVD - filesystem and a raw sector-based access to the device. Unfortunately you must - be root (under Linux) to get the sector address of a file. You got the +
The whole old-style DVD support with libcss
therefore needs a mounted DVD
+ filesystem and raw sector-based access to the device. Unfortunately you must
+ (under Linux) be root to get the sector address of a file. You have the
following choices:
libcss
).
+ libdvdread
0.9.x and libmpdvdkit
do this (new-style DVD
+ support). The kernel UDF filesystem driver is not needed as they already
+ have their own builtin UDF filesystem driver. Also the DVD does not have to
+ be mounted as only the raw sector-based access is used.Sometimes /dev/dvd can't be read by users, so the libdvdread authors - implemented an emulation layer which transfers sector addresses to - filenames+offsets, to emulate raw access on the top of a mounted filesystem +
Sometimes /dev/dvd
cannot be read by users, so the libdvdread
+ authors implemented an emulation layer which transfers sector addresses to
+ filenames+offsets, to emulate raw access on top of a mounted filesystem
or even on a hard disk.
libdvdread even accepts the mountpoint instead of the device name for raw
- access and checks in /proc/mounts
to get the device name. It was
+
libdvdread
even accepts the mountpoint instead of the device name for raw
+ access and checks /proc/mounts
to get the device name. It was
developed for Solaris, where device names are dynamically allocated.
The default DVD device is /dev/dvd
. If your setup differs,
@@ -136,8 +143,8 @@
The authentication and decryption method of the new-style DVD support is done
- using a patched libdvdcss (see above). The method can be specified over the
- environment variable DVDCSS_METHOD
which can be set to
+ using a patched libdvdcss
(see above). The method can be specified through the
+ environment variable DVDCSS_METHOD
, which can be set to
key
, disk
or title
.
If nothing is specified it tries the following methods @@ -149,14 +156,14 @@ the title and disk keys before sending them over the unprotected bus (to prevent eavesdropping). The bus key is needed to get and predecrypt the crypted disk key. -
~/.mplayer/DVDKeys
directory
(fast ;).RPC-1 DVD drives only protect region settings over software DVD players. +
RPC-1 DVD drives only protect region settings through software. RPC-2 drives have a hardware protection that allows 5 changes only. It might be needed/recommended to upgrade the firmware to RPC-1 if you have a RPC-2 DVD - drive. Firmware upgrades can be found - here. If there is + drive. Firmware upgrades can be found on this + firmware page. If there is no firmware upgrade available for your device, use the regionset - tool to set the region code of your DVD-drive (under Linux). + tool to set the region code of your DVD drive (under Linux). Warning: You can only set the region 5 times.
For the complete list of available options, please read the man page.
- The Syntax for a standard Video CD (VCD) is as followed:
- mplayer -vcd <track> [-cdrom-device <device>]
.
- Example: mplayer -vcd 2 -cdrom-device /dev/hdc
mplayer -vcd <track> [-cdrom-device <device>]
Example: mplayer -vcd 2 -cdrom-device /dev/hdc
The default VCD device is /dev/cdrom
. If your setup differs,
+ make a symlink or specify the correct device on the command line with the
+ -cdrom-device
option.
Note: At least Plextor and some Toshiba SCSI CD-ROM drives have + horrible performance reading VCDs. This is because the the CDROMREADRAW ioctl + is not fully implemented for these drives. If you have some knowledge of SCSI + programming, please help us implement generic + SCSI support for VCDs.
VCD disks consists of 2 or more track:
+VCD disks consist of one or more tracks:
-vcd 2
- first.-vcd 2
first.About .DAT files:
+The ~600 MB file visible on the first track of the mounted vcd isn't a real
- file! It's a so called iso gateway, created to allow Windows to handle such
- tracks (Windows doesn't allow raw device access to applications at all).
- Under linux, you cannot copy or play such files (they contain garbage).
- Under Windows it is possible as its iso9660 driver emulates the raw reading of
- tracks in this file. To play a .DAT file you need a kernel driver which can be
- found in the Linux version of PowerDVD. It has a modified iso9660 filesystem
- (vcdfs/isofs-2.4.X.o) driver, which is able to emulate the
- raw tracks through this shadow .DAT file. If you mount the disc using their
- driver, you can copy and even play .DAT files with mplayer. But it won't
- work with the standard iso9660 driver of the kernel! It is recommended to
- use the -vcd
option instead. Alternate options for VCD copy are
- the new cdfs kernel driver (shows CD sessions as image files) and
- cdrdao (a bit-to-bit cd grabber/copier application).
The default VCD device is /dev/cdrom
. If your setup differs,
- make a symlink, or specify the correct device on the command line with the
- -cdrom-device
option.
The ~600 MB file visible on the first track of the mounted VCD is not a real
+ file! It is a so called ISO gateway, created to allow Windows to handle such
+ tracks (Windows does not allow raw device access to applications at all).
+ Under Linux you cannot copy or play such files (they contain garbage). Under
+ Windows it is possible as its iso9660 driver emulates the raw reading of
+ tracks in this file. To play a .DAT file you need the kernel driver which can
+ be found in the Linux version of PowerDVD. It has a modified iso9660
+ filesystem (vcdfs/isofs-2.4.X.o
) driver, which is able to emulate
+ the raw tracks through this shadow .DAT file. If you mount the disc using
+ their driver, you can copy and even play .DAT files with mplayer. But it
+ will not work with the standard iso9660 driver of the Linux kernel!
+ Use the -vcd
option instead. Alternatives for VCD copying are
+ the new cdfs kernel
+ driver (not part of the official kernel) that shows CD sessions
+ as image files and cdrdao, a
+ bit-by-bit CD grabbing/copying application.