Re: [gentoo-user] {OT} dvdrip permissions error, alternative?
On Thu, 12 Oct 2006 22:55:03 -0700, Grant wrote:
I'm tweaking that script you wrote. Here's what I have:
#!/bin/bash
echo Enter DVD filename:
read FILENAME
mount /dev/cdrom
TITLE=$(vobcopy -I 21 | awk '/DVD-name:/ {print $3}')
vobcopy -m || exit
mkisofs -dvd-video -V $TITLE -o $FILENAME $TITLE || exit
rm -rf $TITLE
umount /dev/cdrom
Can you tell me what purpose the || exit portions serve?
'||' is a logical or. When used to chain commands, as in cmd1 || cmd2
it means run cmd1, if that fails run cmd2 (if the first command succeeds
and returns true, the OR will alsays be true so there's no need to run
cmd2). All is does here is exit the script if vobcopy or mkisofs return
an error, because there'd be no point in continuing.
Also, how
can I run the script by typing /path/to/getdvd? I've tried:
chmod +x getdvd
That should work, assuming you're i the same directory at getdvd. I keep
my scripts in ~/bin, with the x bits set, and have ~/bin in $PATH, so I
don't need to give the path to run them.
--
Neil Bothwick
SUBLIMINALsendmoneyTAGLINE
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Re: [gentoo-user] {OT} dvdrip permissions error, alternative?
On Friday 13 October 2006 07:55, Grant wrote:
#!/bin/bash
[SNIP]
vobcopy -m || exit
mkisofs -dvd-video -V $TITLE -o $FILENAME $TITLE || exit
[SNIP]
Can you tell me what purpose the || exit portions serve?
It's quite common is bash scripts to define a function named die:
die() {
echo $@
exit 1
}
If you define that at the top of your script you ceplace the above with this:
vobcopy -m || die vobcopy failed
mkisofs -dvd-video -V $TITLE -o $FILENAME $TITLE || die mkisofs failed
I hope you get the point...
--
Bo Andresen
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Re: [gentoo-user] {OT} dvdrip permissions error, alternative?
--- Bo Ørsted Andresen [EMAIL PROTECTED] wrote:
It's quite common is bash scripts to define a
function named die:
die() {
echo $@
exit 1
}
Or, with use of a specific return code:
die() {
RT=$1
shift
echo $@
exit $RT
}
and call it either with the error code of the previous
program:
vobcopy -m || die $? vobcopy failed
or your own return code
vobcopy -m || die 58 vobcopy failed
Just a point a detail, if it can be useful...
G. Moko
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gentoo-user@gentoo.org mailing list
Re: [gentoo-user] {OT} dvdrip permissions error, alternative?
I'm tweaking that script you wrote. Here's what I have:
#!/bin/bash
echo Enter DVD filename:
read FILENAME
mount /dev/cdrom
TITLE=$(vobcopy -I 21 | awk '/DVD-name:/ {print $3}')
vobcopy -m || exit
mkisofs -dvd-video -V $TITLE -o $FILENAME $TITLE || exit
rm -rf $TITLE
umount /dev/cdrom
Can you tell me what purpose the || exit portions serve?
'||' is a logical or. When used to chain commands, as in cmd1 || cmd2
it means run cmd1, if that fails run cmd2 (if the first command succeeds
and returns true, the OR will alsays be true so there's no need to run
cmd2). All is does here is exit the script if vobcopy or mkisofs return
an error, because there'd be no point in continuing.
Got it.
Also, how
can I run the script by typing /path/to/getdvd? I've tried:
chmod +x getdvd
That should work, assuming you're i the same directory at getdvd. I keep
my scripts in ~/bin, with the x bits set, and have ~/bin in $PATH, so I
don't need to give the path to run them.
Here's what I get:
[EMAIL PROTECTED] ~ $ ls -l
-rwxrwxrwx 1 grant grant 386 Oct 12 22:24 getdvd
[EMAIL PROTECTED] ~ $ getdvd
-bash: getdvd: command not found
I like the sound of your ~/bin setup. How can I add that to my PATH
permanently? Is it 'export PATH=~/bin' ?
- Grant
--
gentoo-user@gentoo.org mailing list
Re: [gentoo-user] {OT} dvdrip permissions error, alternative?
On Fri, 13 Oct 2006 07:52:57 -0700, Grant wrote: [EMAIL PROTECTED] ~ $ ls -l -rwxrwxrwx 1 grant grant 386 Oct 12 22:24 getdvd [EMAIL PROTECTED] ~ $ getdvd -bash: getdvd: command not found Unless the current directory is in your path, you need to invoke it with ./getdvd. I like the sound of your ~/bin setup. How can I add that to my PATH permanently? Is it 'export PATH=~/bin' ? export PATH=$PATH:~/bin or export PATH=~/bin:$PATH depending on whether you want your own bin searched first or last. Put this in ~/.bashrc -- Neil Bothwick The value of a program is proportional to the weight of its output. signature.asc Description: PGP signature
Re: [gentoo-user] {OT} dvdrip permissions error, alternative?
[EMAIL PROTECTED] ~ $ ls -l -rwxrwxrwx 1 grant grant 386 Oct 12 22:24 getdvd [EMAIL PROTECTED] ~ $ getdvd -bash: getdvd: command not found Unless the current directory is in your path, you need to invoke it with ./getdvd. I like the sound of your ~/bin setup. How can I add that to my PATH permanently? Is it 'export PATH=~/bin' ? export PATH=$PATH:~/bin or export PATH=~/bin:$PATH depending on whether you want your own bin searched first or last. Put this in ~/.bashrc Uh oh. vobcopy is choking on Silent Hill which is in the Sony copy protection list. [Error] Error writing to /home/grant/movies/SILENT_HILL/VIDEO_TS/VTS_01_1.VOB.partial [Error] Error: Bad address I was hoping vobcopy would be able to get through it. - Grant -- gentoo-user@gentoo.org mailing list
Re: [gentoo-user] {OT} dvdrip permissions error, alternative?
[EMAIL PROTECTED] ~ $ ls -l -rwxrwxrwx 1 grant grant 386 Oct 12 22:24 getdvd [EMAIL PROTECTED] ~ $ getdvd -bash: getdvd: command not found Unless the current directory is in your path, you need to invoke it with ./getdvd. I like the sound of your ~/bin setup. How can I add that to my PATH permanently? Is it 'export PATH=~/bin' ? export PATH=$PATH:~/bin or export PATH=~/bin:$PATH depending on whether you want your own bin searched first or last. Put this in ~/.bashrc Uh oh. vobcopy is choking on Silent Hill which is in the Sony copy protection list. [Error] Error writing to /home/grant/movies/SILENT_HILL/VIDEO_TS/VTS_01_1.VOB.partial [Error] Error: Bad address I was hoping vobcopy would be able to get through it. - Grant I just wanted to add that dvdbackup and dd also fail. There appear to be a couple Windows programs that should work though. - Grant -- gentoo-user@gentoo.org mailing list
Re: [gentoo-user] {OT} dvdrip permissions error, alternative?
On Wednesday 11 October 2006 19:12, Neil Bothwick wrote: On Wed, 11 Oct 2006 08:24:48 -0700, Grant wrote: I tried using vobcopy to decrypt my The Life of Mammals dd images and, strangely, it's not working. vobcopy outputs the same error that dvdbackup did, something about an error cracking the CSS keys, which comes from libdvdcss. Could it be using this? http://en.wikipedia.org/wiki/ARccOS Thanks Neil, That reference has shown me what the problem is when trying to play Silent Hill. Paul -- This message has been sent using kmail with gentoo linux -- gentoo-user@gentoo.org mailing list
Re: [gentoo-user] {OT} dvdrip permissions error, alternative?
I tried using vobcopy to decrypt my The Life of Mammals dd images and, strangely, it's not working. vobcopy outputs the same error that dvdbackup did, something about an error cracking the CSS keys, which comes from libdvdcss. Could it be using this? http://en.wikipedia.org/wiki/ARccOS Would it then make sense that vobcopy can rip a decrypted backup from the disc but not from a disc image? - Grant -- gentoo-user@gentoo.org mailing list
Re: [gentoo-user] {OT} dvdrip permissions error, alternative?
Could it be using this? http://en.wikipedia.org/wiki/ARccOS
Would it then make sense that vobcopy can rip a decrypted backup from
the disc but not from a disc image?
Possibly, because dd would trip up on the deliberate errors.
I'm tweaking that script you wrote. Here's what I have:
#!/bin/bash
echo Enter DVD filename:
read FILENAME
mount /dev/cdrom
TITLE=$(vobcopy -I 21 | awk '/DVD-name:/ {print $3}')
vobcopy -m || exit
mkisofs -dvd-video -V $TITLE -o $FILENAME $TITLE || exit
rm -rf $TITLE
umount /dev/cdrom
Can you tell me what purpose the || exit portions serve? Also, how
can I run the script by typing /path/to/getdvd? I've tried:
chmod +x getdvd
and:
chmod 0777 getdvd
with no luck.
- Grant
--
gentoo-user@gentoo.org mailing list
Re: [gentoo-user] {OT} dvdrip permissions error, alternative?
mount /dev/dvd
TITLE=$(vobcopy -I 21 | awk '/DVD-name:/ {print $3}')
vobcopy -m || exit
mkisofs -dvd-video -V ${TITLE} -o ${TITLE}.iso ${TITLE} || exit
rm -fr ${TITLE}
umount /dev/dvd
Thanks for the script. I set it up to temporarily use my dd images as
the source, and it looks like the iso comes out about 13MB smaller
than the dd image. Does that make sense?
I guess that could be down to the encryption overhead.
Also, mkisofs didn't like -o ${TITLE}.iso and errored with something
like:
'.iso' is an invalid atom
Does ${TITLE}.iso need quotes?
It shouldn't, because disc names shouldn't include spaces, but it's
probably safest to add them, because shouldn't rarely equals doesn't. The
error looks like it could be caused by a space at the end of the movie
name, although awk should have removed that.
I tried using vobcopy to decrypt my The Life of Mammals dd images
and, strangely, it's not working. vobcopy outputs the same error that
dvdbackup did, something about an error cracking the CSS keys, which
comes from libdvdcss. VLC plays the post-vobcopy image just fine, but
it won't play in totem and mplayer. The weird thing is, vobcopy
seemed to decrypt perfectly when working straight from the DVD so that
the image could be played in all the players. I don't have the DVD
now to test with.
I guess I'll just have to do more testing when I can.
- Grant
--
gentoo-user@gentoo.org mailing list
Re: [gentoo-user] {OT} dvdrip permissions error, alternative?
On Wed, 11 Oct 2006 08:24:48 -0700, Grant wrote: I tried using vobcopy to decrypt my The Life of Mammals dd images and, strangely, it's not working. vobcopy outputs the same error that dvdbackup did, something about an error cracking the CSS keys, which comes from libdvdcss. Could it be using this? http://en.wikipedia.org/wiki/ARccOS -- Neil Bothwick BREAKFAST.COM Halted - Cereal Port Not Responding signature.asc Description: PGP signature
Re: [gentoo-user] {OT} dvdrip permissions error, alternative?
On Mon, 9 Oct 2006 17:08:21 -0700, Grant wrote:
mount /dev/cdrom vobcopy -m -o MOVIE_NAME mkisofs -l -o
MOVIE_NAME.iso MOVIE_NAME rm -rf MOVIE_NAME
How can I set that up in a script and execute just the script?
#!/bin/bash
mount /dev/dvd
TITLE=$(vobcopy -I 21 | awk '/DVD-name:/ {print $3}')
vobcopy -m || exit
mkisofs -dvd-video -V ${TITLE} -o ${TITLE}.iso ${TITLE} || exit
rm -fr ${TITLE}
umount /dev/dvd
This is also better for performance because the system won't have to
decrypt while it's playing right?
That seems reasonable, although I've no idea how much effort is needed
to decrypt a DVD once the key is known.
--
Neil Bothwick
Do you reply to our surveys.?
[X]Never [ ]Always [ ]Sometimes
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Re: [gentoo-user] {OT} dvdrip permissions error, alternative?
On Mon, 9 Oct 2006 17:08:21 -0700, Grant wrote:
mount /dev/cdrom vobcopy -m -o MOVIE_NAME mkisofs -l -o
MOVIE_NAME.iso MOVIE_NAME rm -rf MOVIE_NAME
How can I set that up in a script and execute just the script?
#!/bin/bash
mount /dev/dvd
TITLE=$(vobcopy -I 21 | awk '/DVD-name:/ {print $3}')
vobcopy -m || exit
mkisofs -dvd-video -V ${TITLE} -o ${TITLE}.iso ${TITLE} || exit
umount /dev/dvd
This is also better for performance because the system won't have to
decrypt while it's playing right?
That seems reasonable, although I've no idea how much effort is needed
to decrypt a DVD once the key is known.
--
Neil Bothwick
Bother, said Pooh, as he crossed the event horizon.
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Re: [gentoo-user] {OT} dvdrip permissions error, alternative?
mount /dev/cdrom vobcopy -m -o MOVIE_NAME mkisofs -l -o
MOVIE_NAME.iso MOVIE_NAME rm -rf MOVIE_NAME
How can I set that up in a script and execute just the script?
#!/bin/bash
mount /dev/dvd
TITLE=$(vobcopy -I 21 | awk '/DVD-name:/ {print $3}')
vobcopy -m || exit
mkisofs -dvd-video -V ${TITLE} -o ${TITLE}.iso ${TITLE} || exit
rm -fr ${TITLE}
umount /dev/dvd
Thanks for the script. I set it up to temporarily use my dd images as
the source, and it looks like the iso comes out about 13MB smaller
than the dd image. Does that make sense?
Also, mkisofs didn't like -o ${TITLE}.iso and errored with something like:
'.iso' is an invalid atom
Does ${TITLE}.iso need quotes?
- Grant
--
gentoo-user@gentoo.org mailing list
Re: [gentoo-user] {OT} dvdrip permissions error, alternative?
On Tue, 10 Oct 2006 08:59:00 -0700, Grant wrote:
mount /dev/dvd
TITLE=$(vobcopy -I 21 | awk '/DVD-name:/ {print $3}')
vobcopy -m || exit
mkisofs -dvd-video -V ${TITLE} -o ${TITLE}.iso ${TITLE} || exit
rm -fr ${TITLE}
umount /dev/dvd
Thanks for the script. I set it up to temporarily use my dd images as
the source, and it looks like the iso comes out about 13MB smaller
than the dd image. Does that make sense?
I guess that could be down to the encryption overhead.
Also, mkisofs didn't like -o ${TITLE}.iso and errored with something
like:
'.iso' is an invalid atom
Does ${TITLE}.iso need quotes?
It shouldn't, because disc names shouldn't include spaces, but it's
probably safest to add them, because shouldn't rarely equals doesn't. The
error looks like it could be caused by a space at the end of the movie
name, although awk should have removed that.
--
Neil Bothwick
Love and Trust: Oral sex between cannibals.
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Re: [gentoo-user] {OT} dvdrip permissions error, alternative?
On Sun, 8 Oct 2006 20:56:45 +1300, Nick Rout wrote: You're right. I read this information some years ago in a normally reliable source, and saw no reason to doubt it as it made sense. bit I've just tried a dd copy and it worked. It failed on the first attempt, but after running lsdvd, it worked for the whole disc, and mplayer played it. It here refers to the attempt to copy the disc with dd. The copy failed after around 100MB the first time, but succeeded after lsdvd. What is happenning here is that lsdvd is cracking the css keys via libdvdcss and caching the keys in ~/.dvdcss. If you move the image to another computer, or try to read it as another user, the keys will neeed to be cracked again. I've tried playing the ISO image as root and it still worked. -- Neil Bothwick I wonder how much deeper would the ocean be without sponges. signature.asc Description: PGP signature
Re: [gentoo-user] {OT} dvdrip permissions error, alternative?
and dd means bad portability. What do you mean by this? dd simply mirrors the UDF filesystem from the disc in a file? According to someone else's post, the CSS keys would need to be cracked again if the backup was moved to a different computer. That's all I meant. If you want to extract the files from the filesystem, use vobcopy. Would vobcopy -m decrypt the DVD so that it can be played back without a need to crack or use stored CSS keys? - Grant -- gentoo-user@gentoo.org mailing list
Re: [gentoo-user] {OT} dvdrip permissions error, alternative?
On Mon, 9 Oct 2006 07:55:10 -0700, Grant wrote: Would vobcopy -m decrypt the DVD so that it can be played back without a need to crack or use stored CSS keys? Yes. -- Neil Bothwick IBM: Inferior But Marketable. signature.asc Description: PGP signature
Re: [gentoo-user] {OT} dvdrip permissions error, alternative?
Would vobcopy -m decrypt the DVD so that it can be played back without a need to crack or use stored CSS keys? Yes. That does seem to work with the stubborn The Life of Mammals. I wish I didn't have to mount the DVD before running vobcopy though. I suppose a mkisofs command after vobcopy would make for a pretty good process. - Grant -- gentoo-user@gentoo.org mailing list
Re: [gentoo-user] {OT} dvdrip permissions error, alternative?
On Mon, 9 Oct 2006 09:42:21 -0700, Grant wrote: That does seem to work with the stubborn The Life of Mammals. I wish I didn't have to mount the DVD before running vobcopy though. vobcopy reads the VOB files directly, rather than reading /dev/dvd as a video source. I suppose a mkisofs command after vobcopy would make for a pretty good process. It works for me. I've used it to copy encrypted DVDs that are 4.3GB. -- Neil Bothwick What do you call a Tellytubbie with a finger up its bum? Stinky Pinky! signature.asc Description: PGP signature
Re: [gentoo-user] {OT} dvdrip permissions error, alternative?
That does seem to work with the stubborn The Life of Mammals. I wish I didn't have to mount the DVD before running vobcopy though. vobcopy reads the VOB files directly, rather than reading /dev/dvd as a video source. I suppose a mkisofs command after vobcopy would make for a pretty good process. It works for me. I've used it to copy encrypted DVDs that are 4.3GB. Yeah vobcopy is definitely doing some serious decrypting. After it mirrors The Life of Mammals mplayer and totem can play it, and with dd (or straight from the disc) only VLC could play it. I think I'll use this command to mount, rip, image, and delete: mount /dev/cdrom vobcopy -m -o MOVIE_NAME mkisofs -l -o MOVIE_NAME.iso MOVIE_NAME rm -rf MOVIE_NAME How can I set that up in a script and execute just the script? This is also better for performance because the system won't have to decrypt while it's playing right? - Grant -- gentoo-user@gentoo.org mailing list
Re: [gentoo-user] {OT} dvdrip permissions error, alternative?
On 07 October 2006 18:56, Neil Bothwick wrote: On Fri, 6 Oct 2006 17:36:10 -0500, Boyd Stephen Smith Jr. wrote: That won't work on CSS scrambled discs. You'll copy the scrambled data but not the key. That's not true. The CSS key is in the standard filesystem data, not in some subtrack data. You're right. I read this information some years ago in a normally reliable source, and saw no reason to doubt it as it made sense. bit I've just tried a dd copy and it worked. It failed on the first attempt, but after running lsdvd, it worked for the whole disc, and mplayer played it. While the information above is correct, most DVD devices do not copy the particular part of the filesystem. Their firmware simply doesn't do it. Uwe -- Mark Twain: I rather decline two drinks than a German adjective. http://www.SysEx.com.na -- gentoo-user@gentoo.org mailing list
Re: [gentoo-user] {OT} dvdrip permissions error, alternative?
On Sat, 7 Oct 2006 17:56:36 +0100 Neil Bothwick [EMAIL PROTECTED] wrote: On Fri, 6 Oct 2006 17:36:10 -0500, Boyd Stephen Smith Jr. wrote: That won't work on CSS scrambled discs. You'll copy the scrambled data but not the key. That's not true. The CSS key is in the standard filesystem data, not in some subtrack data. You're right. I read this information some years ago in a normally reliable source, and saw no reason to doubt it as it made sense. bit I've just tried a dd copy and it worked. It failed on the first attempt, but after running lsdvd, it worked for the whole disc, and mplayer played it. What is happenning here is that lsdvd is cracking the css keys via libdvdcss and caching the keys in ~/.dvdcss. If you move the image to another computer, or try to read it as another user, the keys will neeed to be cracked again. -- Neil Bothwick Bother, said Pooh, as he connected at 300 bps. -- gentoo-user@gentoo.org mailing list
Re: [gentoo-user] {OT} dvdrip permissions error, alternative?
That won't work on CSS scrambled discs. You'll copy the scrambled data but not the key. That's not true. The CSS key is in the standard filesystem data, not in some subtrack data. You're right. I read this information some years ago in a normally reliable source, and saw no reason to doubt it as it made sense. bit I've just tried a dd copy and it worked. It failed on the first attempt, but after running lsdvd, it worked for the whole disc, and mplayer played it. What is happenning here is that lsdvd is cracking the css keys via libdvdcss and caching the keys in ~/.dvdcss. If you move the image to another computer, or try to read it as another user, the keys will neeed to be cracked again. dvdbackup doesn't work on The Life of Mammals (and surely others) and dd means bad portability. Are there any other options for a full backup? - Grant -- gentoo-user@gentoo.org mailing list
Re: [gentoo-user] {OT} dvdrip permissions error, alternative?
On 10/8/2006, Grant [EMAIL PROTECTED] wrote: dvdbackup doesn't work on The Life of Mammals (and surely others) and dd means bad portability. Are there any other options for a full backup? perhaps there is some newfangled encryption on it. What version of libdvdcss do you have? Perhaps upgrading to a later version? -- gentoo-user@gentoo.org mailing list
Re: [gentoo-user] {OT} dvdrip permissions error, alternative?
dvdbackup doesn't work on The Life of Mammals (and surely others) and dd means bad portability. Are there any other options for a full backup? perhaps there is some newfangled encryption on it. What version of libdvdcss do you have? Perhaps upgrading to a later version? I'm using version 1.2.9 and it looks like that's the latest. - Grant -- gentoo-user@gentoo.org mailing list
Re: [gentoo-user] {OT} dvdrip permissions error, alternative?
On Saturday 07 October 2006 06:50, Grant wrote: I think I'll stick with: dd if=/dev/dvd of=image.dvd That won't work on CSS scrambled discs. You'll copy the scrambled data but not the key. Instead, use vobcopy followed by growisofs. What about this (it's what I've been doing): lsdvd dd if=/dev/dvd of=image.dvd Is there any advantage to creating an ISO filesystem out of the image if you aren't going to burn it? yes. ease of transfer, keping everyting togther. still playable with xine dvd://path/to.iso why are you naming it image.dvd instead of image.iso? Also, is there any way to compress the image without doing any kind of transcoding or that type of reprocessing? the mpeg streams on the dvd ARE compressed. thats what the mpeg codec does. You can try the usual suspects - zip, bzip etc, but you won't get far. programs that reduce the size of DVD9 so that they will fit on a DVD5 usually requantise the stream, I am not sure what that means, but it is much quicker than transcoding to another codec like xvid. xvid will, of course, give you a much smaller avi file. the analogy with flac is not really appropriate. flac is a lossless compression, you start with an uncompressed wav file and end up with a losslessly compressed audio file. A DVD is already lossy compressed to mpeg2, so it is not logical to make an analogy with flac. As I said, you can requantise, but of course you lose something... - Grant -- gentoo-user@gentoo.org mailing list
Re: [gentoo-user] {OT} dvdrip permissions error, alternative?
On Fri, 6 Oct 2006 17:36:10 -0500, Boyd Stephen Smith Jr. wrote: That won't work on CSS scrambled discs. You'll copy the scrambled data but not the key. That's not true. The CSS key is in the standard filesystem data, not in some subtrack data. You're right. I read this information some years ago in a normally reliable source, and saw no reason to doubt it as it made sense. bit I've just tried a dd copy and it worked. It failed on the first attempt, but after running lsdvd, it worked for the whole disc, and mplayer played it. -- Neil Bothwick Bother, said Pooh, as he connected at 300 bps. signature.asc Description: PGP signature
Re: [gentoo-user] {OT} dvdrip permissions error, alternative?
On Saturday 07 October 2006 03:52, Nick Rout [EMAIL PROTECTED] wrote
about 'Re: [gentoo-user] {OT} dvdrip permissions error, alternative?':
On Saturday 07 October 2006 06:50, Grant wrote:
I think I'll stick with:
dd if=/dev/dvd of=image.dvd
That won't work on CSS scrambled discs. You'll copy the scrambled
data but not the key. Instead, use vobcopy followed by growisofs.
What about this (it's what I've been doing):
lsdvd dd if=/dev/dvd of=image.dvd
Is there any advantage to creating an ISO filesystem out of the image
if you aren't going to burn it?
yes. ease of transfer, keping everyting togther. still playable with
xine dvd://path/to.iso
why are you naming it image.dvd instead of image.iso?
Also, is there any way to compress
the image without doing any kind of transcoding or that type of
reprocessing?
the mpeg streams on the dvd ARE compressed. thats what the mpeg codec
does. You can try the usual suspects - zip, bzip etc, but you won't get
far.
programs that reduce the size of DVD9 so that they will fit on a DVD5
usually requantise the stream, I am not sure what that means, but it is
much quicker than transcoding to another codec like xvid. xvid will, of
course, give you a much smaller avi file.
Increasing the quantization increases the number of pixels represented by a
single data element in the stream. From what I understand, MPEG2 does
very JPEG like compression, meaning that square groups of pixels with
almost the same color will be stored as a single data element with the
average color (and maybe some hinting). Increasing the quantization
further merges some of these groups together, resulting in both quality
and size reductions.
the analogy with flac is not really appropriate. flac is a lossless
compression, you start with an uncompressed wav file and end up with a
losslessly compressed audio file. A DVD is already lossy compressed to
mpeg2, so it is not logical to make an analogy with flac.
Agreed. There are a number of lossless video codecs out there (
http://en.wikipedia.org/wiki/List_of_codecs#Lossless_data_compression_2 ),
though certainly none are in wide use. I'd wager that since your are
starting w/ an already compressed stream, converting to a lossless format
would actually make the video larger. With DVD it isn't practical to
transfer uncompressed video, perhaps we might see some uncompressed video
available with HD-DVD or Blu-ray.
--
If there's one thing we've established over the years,
it's that the vast majority of our users don't have the slightest
clue what's best for them in terms of package stability.
-- Gentoo Developer Ciaran McCreesh
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Re: [gentoo-user] {OT} dvdrip permissions error, alternative?
I think I'll stick with: dd if=/dev/dvd of=image.dvd That won't work on CSS scrambled discs. You'll copy the scrambled data but not the key. Instead, use vobcopy followed by growisofs. What about this (it's what I've been doing): lsdvd dd if=/dev/dvd of=image.dvd Is there any advantage to creating an ISO filesystem out of the image if you aren't going to burn it? yes. ease of transfer, keping everyting togther. still playable with xine dvd://path/to.iso why are you naming it image.dvd instead of image.iso? dd doesn't actually create an ISO filesystem does it? - Grant -- gentoo-user@gentoo.org mailing list
Re: [gentoo-user] {OT} dvdrip permissions error, alternative?
On Sat, 7 Oct 2006 13:43:50 -0700 Grant [EMAIL PROTECTED] wrote: yes. ease of transfer, keping everyting togther. still playable with xine dvd://path/to.iso why are you naming it image.dvd instead of image.iso? dd doesn't actually create an ISO filesystem does it? - Grant dd copies bit for bit. you copy an ISO filesystem to another place, you get an ISO file system. -- gentoo-user@gentoo.org mailing list
Re: [gentoo-user] {OT} dvdrip permissions error, alternative?
What's the error? I've run dvdrip for a long time and don't get any errors. Embarassing, but I needed to change the CHANGE_ME paths to eliminate the errors. I'm trying to make backups of my DVDs that are smaller than the full 8GB but don't lose any noticeable audio or video quality. I'd be happy to just select the audio and video track I want and rip them without any transcoding. Would anyone recommend a program other than dvdrip for this? I would use mplayer's mencode, but mplayer can't play my The Life of Mammals DVD so I don't think mencode will work. I believe that DVD is copy protected. dvd9to5. If you don't put a blank dvd into the drive it'll leave a DVD image under 4.7GB. I do my DVDs with both dvd9to5 and dvdrip (at 192Kbps MP3 audio, 1500Kbps video) and the quality is all but perfect (1800Kbps video should easily clear up the very very small lose). I've been experimenting with dvdrip and it seems like if I want perfect image quality I'll only save about half the space and the process is such a mess. It's time-consuming and lossy. I think I'll stick with: dd if=/dev/dvd of=image.dvd and pay a $2 storage fee per movie instead of $1. That's perfect quality, all the features, and full menus. I could see it if you're trying to fit a movie on a CD or a single-layer DVD, but it doesn't make sense to me for hard disk backups. I wish there was something like FLAC for video so you could make a perfect backup and the only option to be concerned with would be time vs. space. - Grant -- gentoo-user@gentoo.org mailing list
Re: [gentoo-user] {OT} dvdrip permissions error, alternative?
On Fri, 6 Oct 2006 09:59:51 -0700, Grant wrote: I think I'll stick with: dd if=/dev/dvd of=image.dvd That won't work on CSS scrambled discs. You'll copy the scrambled data but not the key. Instead, use vobcopy followed by growisofs. signature.asc Description: PGP signature
Re: [gentoo-user] {OT} dvdrip permissions error, alternative?
I think I'll stick with: dd if=/dev/dvd of=image.dvd That won't work on CSS scrambled discs. You'll copy the scrambled data but not the key. Instead, use vobcopy followed by growisofs. What about this (it's what I've been doing): lsdvd dd if=/dev/dvd of=image.dvd Is there any advantage to creating an ISO filesystem out of the image if you aren't going to burn it? Also, is there any way to compress the image without doing any kind of transcoding or that type of reprocessing? - Grant -- gentoo-user@gentoo.org mailing list
Re: [gentoo-user] {OT} dvdrip permissions error, alternative?
On Fri, 6 Oct 2006 10:50:27 -0700, Grant wrote: That won't work on CSS scrambled discs. You'll copy the scrambled data but not the key. Instead, use vobcopy followed by growisofs. What about this (it's what I've been doing): lsdvd dd if=/dev/dvd of=image.dvd Does it work with scrambled DVDs? The CSS key is supposed to be stored in a separate area that is not available on recordable DVDs. Is there any advantage to creating an ISO filesystem out of the image if you aren't going to burn it? Not really, the likes of mplayer can play from a DVD image directory as easily as an ISO image. -- Neil Bothwick You cannot really appreciate Dilbert unless you've read it in the original Klingon. signature.asc Description: PGP signature
Re: [gentoo-user] {OT} dvdrip permissions error, alternative?
That won't work on CSS scrambled discs. You'll copy the scrambled data but not the key. Instead, use vobcopy followed by growisofs. What about this (it's what I've been doing): lsdvd dd if=/dev/dvd of=image.dvd Does it work with scrambled DVDs? The CSS key is supposed to be stored in a separate area that is not available on recordable DVDs. I'm not dealing with recordable DVDs at all. I'm making backups of my store-bought DVDs to my hard drive. I'm not totally clear on how scrambled DVDs work, but I can tell you that the dd command alone doesn't work, but adding lsdvd at the front does. Also, my The Life of Mammals DVD won't play back in mplayer or totem, but VLC plays it fine either straight from the DVD or from the hard drive after lsdvd+dd. - Grant -- gentoo-user@gentoo.org mailing list
Re: [gentoo-user] {OT} dvdrip permissions error, alternative?
On Friday 06 October 2006 11:59, Grant [EMAIL PROTECTED] wrote
about 'Re: [gentoo-user] {OT} dvdrip permissions error, alternative?':
dd if=/dev/dvd of=image.dvd
This is it's a standard store-bought DVD, this will end up copying the
encrypted (CSS) data to your HD, which will add CPU overhead at play time.
dvdbackup (in portage) does roughly the same thing, but decrypts once, at
rip time. It does no transcoding so everything is at full DVD quality
(and size). It preserves all menus in mirror (-M) mode, but can also be
used to rip individual titles.
--
If there's one thing we've established over the years,
it's that the vast majority of our users don't have the slightest
clue what's best for them in terms of package stability.
-- Gentoo Developer Ciaran McCreesh
pgpIVbiSwVR9q.pgp
Description: PGP signature
Re: [gentoo-user] {OT} dvdrip permissions error, alternative?
On Friday 06 October 2006 12:27, Neil Bothwick [EMAIL PROTECTED] wrote
about 'Re: [gentoo-user] {OT} dvdrip permissions error, alternative?':
On Fri, 6 Oct 2006 09:59:51 -0700, Grant wrote:
dd if=/dev/dvd of=image.dvd
That won't work on CSS scrambled discs. You'll copy the scrambled data
but not the key.
That's not true. The CSS key is in the standard filesystem data, not in
some subtrack data. Before I found dvdbackup I used the method (with a
few modifications, like the conv=noerror option and adding a call to 'pv'
in the pipline to give myself a progress bar) exclusively and rarely ran
into a disk that had issues. Those disks could be ripped with k3b's copy
DVD image... function, which I guess uses the equivalent of cd-paranoia
for DVDs, and also retries errors (like conv=noerror), but still just
gives a .iso as output.
--
If there's one thing we've established over the years,
it's that the vast majority of our users don't have the slightest
clue what's best for them in terms of package stability.
-- Gentoo Developer Ciaran McCreesh
pgpAwIIwLp0Xp.pgp
Description: PGP signature
Re: [gentoo-user] {OT} dvdrip permissions error, alternative?
dd if=/dev/dvd of=image.dvd This is it's a standard store-bought DVD, this will end up copying the encrypted (CSS) data to your HD, which will add CPU overhead at play time. dvdbackup (in portage) does roughly the same thing, but decrypts once, at rip time. It does no transcoding so everything is at full DVD quality (and size). It preserves all menus in mirror (-M) mode, but can also be used to rip individual titles. I have a couple problems with dvdbackup. It doesn't seem to have an option for mirroring the entire DVD structure into a single file like dd does, although I suppose a subsequent command could be used to create an ISO. The other thing is, it doesn't seem to do so well with my The Life of Mammals DVD. dd rips it just fine, but VLC is the only program that will play it. When mirrored with dvdbackup, a couple of Error cracking CSS key messages are displayed in the terminal, and although the process does finish, even VLC won't play the image. - Grant -- gentoo-user@gentoo.org mailing list
Re: [gentoo-user] {OT} dvdrip permissions error, alternative?
On Friday 06 October 2006 20:54, Grant [EMAIL PROTECTED] wrote
about 'Re: [gentoo-user] {OT} dvdrip permissions error, alternative?':
dd if=/dev/dvd of=image.dvd
This is it's a standard store-bought DVD, this will end up copying the
encrypted (CSS) data to your HD, which will add CPU overhead at play
time.
dvdbackup (in portage) does roughly the same thing, but decrypts once,
at rip time.
I have a couple problems with dvdbackup.
It doesn't seem to have an option for mirroring the entire DVD
structure into a single file
That's true, but xine, mplayer, and gstreamer all will play from a
directory as fast or faster then they will play from an ISO. I too prefer
the single-file layout, but it's more important for me to have the CSS
removed.
The other thing is, it doesn't seem to do so well with my The Life of
Mammals DVD. When mirrored with dvdbackup, a couple of Error
cracking CSS key messages are displayed in the terminal.
Never seen that one, but I'll bet that's a limitation of DeCSS, not
dvdbackup. I've sure VLC (when playing the dd image) encounters the same
issues, it is just more forgiving of dropped or otherwise unavailable data
in the stream than other clients. I'm not sure what dvdbackup writes when
it can't DeCSS. It is probably all zeros or complete trash. In either of
those cases it's not surprising all your video players choke on it, even
if they can handle the case of missing data.
In any case, it makes sense for you to use something that doesn't perform
the DeCSS at rip time and instead have VLC handle the lack of data each
time you play it, at least for that DVD.
--
If there's one thing we've established over the years,
it's that the vast majority of our users don't have the slightest
clue what's best for them in terms of package stability.
-- Gentoo Developer Ciaran McCreesh
pgpIaoGOBevCm.pgp
Description: PGP signature
Re: [gentoo-user] {OT} dvdrip permissions error, alternative?
On Thursday 05 October 2006 18:57, Grant wrote: When I click on RIP Title in dvdrip, I get a permission denied error regarding Project.pm. All of the other options in the other tabs are grayed out and unmodifiable. If I try to run the program as root, it says it cannot open the display. Does anyone know what's wrong here? I've tried amd64 and ~amd64 versions. I'm trying to make backups of my DVDs that are smaller than the full 8GB but don't lose any noticeable audio or video quality. I'd be happy to just select the audio and video track I want and rip them without any transcoding. Would anyone recommend a program other than dvdrip for this? I would use mplayer's mencode, but mplayer can't play my The Life of Mammals DVD so I don't think mencode will work. I believe that DVD is copy protected. - Grant stop running it as root. correct the permissions on the /dev/ files and the dir you try to write too. Make sure, the user is in the right groups. -- gentoo-user@gentoo.org mailing list
Re: [gentoo-user] {OT} dvdrip permissions error, alternative?
From: Grant [EMAIL PROTECTED]
Subject: [gentoo-user] {OT} dvdrip permissions error, alternative?
Date: Thu, 5 Oct 2006 09:57:03 -0700
When I click on RIP Title in dvdrip, I get a permission denied error
regarding Project.pm. All of the other options in the other tabs are
grayed out and unmodifiable. If I try to run the program as root, it
says it cannot open the display. Does anyone know what's wrong here?
I've tried amd64 and ~amd64 versions.
I'm trying to make backups of my DVDs that are smaller than the full
8GB but don't lose any noticeable audio or video quality. I'd be
happy to just select the audio and video track I want and rip them
without any transcoding. Would anyone recommend a program other than
dvdrip for this? I would use mplayer's mencode, but mplayer can't
play my The Life of Mammals DVD so I don't think mencode will work.
I believe that DVD is copy protected.
- Grant
--
gentoo-user@gentoo.org mailing list
Hi Grant,
Try the following:
As user (not as root) become root with sux not with su.
Or as user gove root access permission to your X server with
xhost (- see manpage).
I f this does not help:
sux to root and check the DISPLAY environment variable, whether it
is correctly set. Should something like :0.0 or localhost:0.0.
The above are fixing (may be) the symptoms, not the cause of the
problem.
These are comeing from the wrong permissions set for the file
Project.pm .
...but when it is emerged, it should be correctly set.
At this point I have no clue, whether wrong permissions are given
to that file/to those files of package.
Only my two cents, your currency may vary...
HTH and keep hacking!
mcc
--
gentoo-user@gentoo.org mailing list
Re: [gentoo-user] {OT} dvdrip permissions error, alternative?
On Thursday 05 October 2006 17:57, Grant wrote: When I click on RIP Title in dvdrip, I get a permission denied error regarding Project.pm. All of the other options in the other tabs are grayed out and unmodifiable. If I try to run the program as root, it says it cannot open the display. Does anyone know what's wrong here? I've tried amd64 and ~amd64 versions. What's the error? I've run dvdrip for a long time and don't get any errors. I'm trying to make backups of my DVDs that are smaller than the full 8GB but don't lose any noticeable audio or video quality. I'd be happy to just select the audio and video track I want and rip them without any transcoding. Would anyone recommend a program other than dvdrip for this? I would use mplayer's mencode, but mplayer can't play my The Life of Mammals DVD so I don't think mencode will work. I believe that DVD is copy protected. dvd9to5. If you don't put a blank dvd into the drive it'll leave a DVD image under 4.7GB. I do my DVDs with both dvd9to5 and dvdrip (at 192Kbps MP3 audio, 1500Kbps video) and the quality is all but perfect (1800Kbps video should easily clear up the very very small lose). -- Mike Williams -- gentoo-user@gentoo.org mailing list
