7:53 p.m.
Using dd to back up a DVD (for in case dvd gets damaged), I am getting
frequent messages like
..... File shrank by 1069672448 bytes; padding with zeros
So, the .VOB file copied to HD is all messed up????
I do not know yet, because the process is still in progress.
In the past, I never had this issue, and I have seen many
of my dvd's and CD's get damaged when inserted into friend's
home entertainment centers, and had to rebuild them from HD backup.
Any clues how to prevent this message coming from dd ?
Thanx
9:19 p.m.
New subject: OT: backing up a DVD
On 9/11/18 8:53 AM, JD wrote:
Using dd to back up a DVD (for in case dvd gets damaged), I am
getting
frequent messages like
..... File shrank by 1069672448 bytes; padding with zeros
So, the .VOB file copied to HD is all messed up????
I do not know yet, because the process is still in progress.
In the past, I never had this issue, and I have seen many
of my dvd's and CD's get damaged when inserted into friend's
home entertainment centers, and had to rebuild them from HD backup.
Any clues how to prevent this message coming from dd ?
Are you using only "dd" or are you also using "tar"? I only ask since
I've not seen
the message coming from "dd" but recall seeing it from "tar".
--
Cardinal Rule of Presentations: "Tell them what you are going to tell them, tell
them, then tell them what you told them."
5:14 a.m.
New subject: OT: backing up a DVD
On Tue, Sep 11, 2018 at 10:19:44AM +0800, Ed Greshko wrote:
Are you using only "dd" or are you also using
"tar"? I only ask since I've not seen
the message coming from "dd" but recall seeing it from "tar".
To expand on that:
$ strings `which dd` | grep shrank
$ strings `which tar` | grep shrank
%s: File shrank by %s bytes; padding with zeros
...
and presumably the warning means that between stat()ing the file and
opening it and reading its contents, the size of the file got smaller.
So I think the OP is doing more than just 'dd'ing the raw DVD.
--
More than any other time in history, mankind faces a crossroads. One path
leads to despair and utter hopelessness. The other, to total extinction.
Let us pray we have the wisdom to choose correctly.
-- Woody Allen
11:24 a.m.
New subject: OT: backing up a DVD
On 09/11/2018 04:14 AM, Dave Mitchell wrote:
On Tue, Sep 11, 2018 at 10:19:44AM +0800, Ed Greshko wrote:
> Are you using only "dd" or are you also using "tar"? I only ask
since I've not seen
> the message coming from "dd" but recall seeing it from "tar".
To expand on that:
$ strings `which dd` | grep shrank
$ strings `which tar` | grep shrank
%s: File shrank by %s bytes; padding with zeros
...
and presumably the warning means that between stat()ing the file and
opening it and reading its contents, the size of the file got smaller.
So I think the OP is doing more than just 'dd'ing the raw DVD.
Sorry, I did
respond and explained my mistake
to another responder that it was my bad.
I was TARing and I explained the commands I used.
5:29 p.m.
New subject: OT: backing up a DVD
On 11Sep2018 10:24, JD <jd1008(a)gmail.com> wrote:
On 09/11/2018 04:14 AM, Dave Mitchell wrote:
>On Tue, Sep 11, 2018 at 10:19:44AM +0800, Ed Greshko wrote:
>>Are you using only "dd" or are you also using "tar"? I only
ask since I've not seen
>>the message coming from "dd" but recall seeing it from "tar".
>To expand on that:
>
>
> $ strings `which dd` | grep shrank
>
> $ strings `which tar` | grep shrank
> %s: File shrank by %s bytes; padding with zeros
> ...
>
>
>and presumably the warning means that between stat()ing the file and
>opening it and reading its contents, the size of the file got smaller.
>
>So I think the OP is doing more than just 'dd'ing the raw DVD.
Sorry, I did respond and explained my mistake
to another responder that it was my bad.
I was TARing and I explained the commands I used.
Have we considered that (a) the mount might lie about the VOB size (I'm
assuming it was a VOB file from the size - they're generally around 1GB in
size) or that (b) tar got a zero byte read when reading the file (filesystem
bug? I/O error on the disc? DVD CSS stuff screwing with the data?)
The reason for the padding is that tar writes a header with the file size
before the file content, so it needs to pad.
Regarding the DVD CSS stuff: I seem to recall from long ago that reading a CSS
DVD without the libdvdcss stuff to arrange decoding produced read issues, not
just garbled data. This might be that.
Try running wc or something against the problematic file, see if it reads the
whole thing. Even "cat >/dev/null <the-file" might be informative.
CHeers,
Cameron Simpson <cs(a)cskk.id.au>
5:39 p.m.
New subject: OT: backing up a DVD
On 13Sep2018 08:29, Cameron Simpson <cs(a)cskk.id.au> wrote:
Regarding the DVD CSS stuff: I seem to recall from long ago that
reading a CSS
DVD without the libdvdcss stuff to arrange decoding produced read issues, not
just garbled data. This might be that.
Ah, here we go. In the tar-1.30 source, src/create.c, around line 1104. The
"shrank...padding" message happens if tar gets a short read (not an I/O error).
So I think the VOB file read is very short. See if other tools can read that
file, since it is a mounted drive.
Cheers,
Cameron Simpson <cs(a)cskk.id.au>
6:40 p.m.
New subject: OT: backing up a DVD
On 09/12/2018 04:39 PM, Cameron Simpson wrote:
On 13Sep2018 08:29, Cameron Simpson <cs(a)cskk.id.au> wrote:
> Regarding the DVD CSS stuff: I seem to recall from long ago that
> reading a CSS DVD without the libdvdcss stuff to arrange decoding
> produced read issues, not just garbled data. This might be that.
Ah, here we go. In the tar-1.30 source, src/create.c, around line
1104. The "shrank...padding" message happens if tar gets a short read
(not an I/O error).
So I think the VOB file read is very short. See if other tools can
read that file, since it is a mounted drive.
Cheers,
Cameron Simpson <cs(a)cskk.id.au>
I tried that, and it is clear that tar is
unable to read the drive. To wit:
$ ls -l VTS_10_1.VOB
-r--------. 1 jd jd 1073739776 Mar 18 2013 VTS_10_1.VOB
$ cat VTS_10_1.VOB | wc -c
cat: /run/media/jd/JACK_REACHER/VIDEO_TS/VTS_10_1.VOB: Input/output error
4067328
So, the output file was padded by zeros instead of the real McCoys!!!
In other words, dvdcss screwed up royally, and I cannot use the backup
as replacement if my DVD gets seriously damaged by a bad player drive.
Just wonderbar!!!!
6:53 p.m.
New subject: OT: backing up a DVD
On 9/13/18 7:40 AM, JD wrote:
On 09/12/2018 04:39 PM, Cameron Simpson wrote:
> On 13Sep2018 08:29, Cameron Simpson <cs(a)cskk.id.au> wrote:
>> Regarding the DVD CSS stuff: I seem to recall from long ago that reading a CSS
>> DVD without the libdvdcss stuff to arrange decoding produced read issues, not
>> just garbled data. This might be that.
>
> Ah, here we go. In the tar-1.30 source, src/create.c, around line 1104. The
> "shrank...padding" message happens if tar gets a short read (not an I/O
error).
>
> So I think the VOB file read is very short. See if other tools can read that file,
> since it is a mounted drive.
>
> Cheers,
> Cameron Simpson <cs(a)cskk.id.au>
I tried that, and it is clear that tar is unable to read the drive. To wit:
$ ls -l VTS_10_1.VOB
-r--------. 1 jd jd 1073739776 Mar 18 2013 VTS_10_1.VOB
$ cat VTS_10_1.VOB | wc -c
cat: /run/media/jd/JACK_REACHER/VIDEO_TS/VTS_10_1.VOB: Input/output error
4067328
So, the output file was padded by zeros instead of the real McCoys!!!
In other words, dvdcss screwed up royally, and I cannot use the backup
as replacement if my DVD gets seriously damaged by a bad player drive.
Just wonderbar!!!!
libdvdcss did not screw up at all. "cat" is unaware of, and doesn't use,
libdvdcss.
--
Cardinal Rule of Presentations: "Tell them what you are going to tell them, tell
them, then tell them what you told them."
6:57 p.m.
New subject: OT: backing up a DVD
On 09/12/2018 05:53 PM, Ed Greshko wrote:
On 9/13/18 7:40 AM, JD wrote:
>
> On 09/12/2018 04:39 PM, Cameron Simpson wrote:
>> On 13Sep2018 08:29, Cameron Simpson <cs(a)cskk.id.au> wrote:
>>> Regarding the DVD CSS stuff: I seem to recall from long ago that reading a
CSS
>>> DVD without the libdvdcss stuff to arrange decoding produced read issues,
not
>>> just garbled data. This might be that.
>> Ah, here we go. In the tar-1.30 source, src/create.c, around line 1104. The
>> "shrank...padding" message happens if tar gets a short read (not an I/O
error).
>>
>> So I think the VOB file read is very short. See if other tools can read that
file,
>> since it is a mounted drive.
>>
>> Cheers,
>> Cameron Simpson <cs(a)cskk.id.au>
> I tried that, and it is clear that tar is unable to read the drive. To wit:
>
> $ ls -l VTS_10_1.VOB
> -r--------. 1 jd jd 1073739776 Mar 18 2013 VTS_10_1.VOB
> $ cat VTS_10_1.VOB | wc -c
> cat: /run/media/jd/JACK_REACHER/VIDEO_TS/VTS_10_1.VOB: Input/output error
> 4067328
> So, the output file was padded by zeros instead of the real McCoys!!!
> In other words, dvdcss screwed up royally, and I cannot use the backup
> as replacement if my DVD gets seriously damaged by a bad player drive.
> Just wonderbar!!!!
>
libdvdcss did not screw up at all. "cat" is unaware of, and doesn't use,
libdvdcss.
So, how in tarnation can I back up this DVD.
What tool can I use that will use dvdcss AND
back up the DVD???
7:05 p.m.
New subject: OT: backing up a DVD
On 9/13/18 7:57 AM, JD wrote:
So, how in tarnation can I back up this DVD.
What tool can I use that will use dvdcss AND
back up the DVD???
Well, k3b has, under tools, "Rip Video DVD".
I recall using it in the past, but can't find a DVD in my home to test.
--
Cardinal Rule of Presentations: "Tell them what you are going to tell them, tell
them, then tell them what you told them."
8:03 p.m.
New subject: OT: backing up a DVD
On 09/12/2018 06:05 PM, Ed Greshko wrote:
On 9/13/18 7:57 AM, JD wrote:
> So, how in tarnation can I back up this DVD.
> What tool can I use that will use dvdcss AND
> back up the DVD???
Well, k3b has, under tools, "Rip Video DVD".
I recall using it in the past, but can't find a DVD in my home to test.
Using
k3b - and dmesg shows 51 messages like this one
[212014.458325] blk_update_request: I/O error, dev sr0, sector 2443668
So, the dvd is bad?
But it plays flawlessly!!!
8:16 p.m.
New subject: OT: backing up a DVD
On 09/12/2018 07:03 PM, JD wrote:
On 09/12/2018 06:05 PM, Ed Greshko wrote:
> On 9/13/18 7:57 AM, JD wrote:
>> So, how in tarnation can I back up this DVD.
>> What tool can I use that will use dvdcss AND
>> back up the DVD???
> Well, k3b has, under tools, "Rip Video DVD".
>
> I recall using it in the past, but can't find a DVD in my home to test.
Using k3b - and dmesg shows 51 messages like this one
[212014.458325] blk_update_request: I/O error, dev sr0, sector 2443668
So, the dvd is bad?
But it plays flawlessly!!!
So far, k3b has only written 1251180544 bytes
and is unable to go past sector 610,928
So, I guess it is either css or physical damage.
But it is a brand new DVD, and I have not yet
taken it to my friend's place to watch together
on their huge 120 inch screen.
8:56 p.m.
New subject: OT: backing up a DVD
On 9/13/18 9:16 AM, JD wrote:
On 09/12/2018 07:03 PM, JD wrote:
>
> On 09/12/2018 06:05 PM, Ed Greshko wrote:
>> On 9/13/18 7:57 AM, JD wrote:
>>> So, how in tarnation can I back up this DVD.
>>> What tool can I use that will use dvdcss AND
>>> back up the DVD???
>> Well, k3b has, under tools, "Rip Video DVD".
>>
>> I recall using it in the past, but can't find a DVD in my home to test.
> Using k3b - and dmesg shows 51 messages like this one
> [212014.458325] blk_update_request: I/O error, dev sr0, sector 2443668
>
> So, the dvd is bad?
>
> But it plays flawlessly!!!
>
So far, k3b has only written 1251180544 bytes
and is unable to go past sector 610,928
So, I guess it is either css or physical damage.
But it is a brand new DVD, and I have not yet
taken it to my friend's place to watch together
on their huge 120 inch screen.
So, the "Rip Video DVD" does not seem to be working. I wouldn't be able to
definitively assign blame.
[egreshko@meimei ~]$ rpm -q libdvdcss
libdvdcss-1.4.2-1.fc28.x86_64
Is the current version I've installed. But, I've not used that version to copy
DVDs. I've used that function since I currently don't have a DVD to try.
I've asked to borrow one, but won't get it until (if they have one), until
tomorrow
everning. Previously I've not had a problem.
When you posted about your installed libdvdcss you posted...
$ ll /usr/lib64/libdvd*
lrwxrwxrwx. 1 root root 18 Jan 29 2017 /usr/lib64/libdvdcss.so
albeit, it is of a slightly older vintage.
Which is a symbolic link only. If that is the full output then it seems rather odd.
[egreshko@meimei ~]$ ll /usr/lib64/libdvd*
lrwxrwxrwx. 1 root root 18 Mar 24 23:30 /usr/lib64/libdvdcss.so.2 ->
libdvdcss.so.2.2.0
-rwxr-xr-x. 1 root root 37888 Mar 24 23:30 /usr/lib64/libdvdcss.so.2.2.0
lrwxrwxrwx. 1 root root 18 Jul 23 19:49 /usr/lib64/libdvdnav.so.4 ->
libdvdnav.so.4.2.0
-rwxr-xr-x. 1 root root 89880 Jul 23 19:49 /usr/lib64/libdvdnav.so.4.2.0
lrwxrwxrwx. 1 root root 19 Jul 23 17:21 /usr/lib64/libdvdread.so.4 ->
libdvdread.so.4.2.0
-rwxr-xr-x. 1 root root 125768 Jul 23 17:21 /usr/lib64/libdvdread.so.4.2.0
Would be more like what one would expect.
--
Cardinal Rule of Presentations: "Tell them what you are going to tell them, tell
them, then tell them what you told them."
9:27 p.m.
New subject: OT: backing up a DVD
On 12Sep2018 19:03, JD <jd1008(a)gmail.com> wrote:
On 09/12/2018 06:05 PM, Ed Greshko wrote:
>On 9/13/18 7:57 AM, JD wrote:
>>So, how in tarnation can I back up this DVD.
>>What tool can I use that will use dvdcss AND
>>back up the DVD???
>Well, k3b has, under tools, "Rip Video DVD".
>
>I recall using it in the past, but can't find a DVD in my home to test.
Using k3b - and dmesg shows 51 messages like this one
[212014.458325] blk_update_request: I/O error, dev sr0, sector 2443668
So, the dvd is bad?
I think both Ed and I think your libdvdcss install may be an issue.
Have you tried using vobcopy? It also uses libdvdread and libdvdcss but at
least it is command line and quite simple.
But it plays flawlessly!!!
Well that's the thing. Unless you've done some CSS chattering at the drive it
will refuse to decrypt those sectors (usually the VOBs - the other files and
filesystem metadata are generally in the clear) and you get I/O errors. because
the drive knows those sectors are forbidden - I imagine a marker bit is used,
one per encrypted sector.
Your DVD _player_ can speak to its drive and say "hello, I am a trusted device
and I have one of the secret keys" and access the content. The libdvdcss
library brute forces the weak encryption to gain access. The drives themselves
are complicit in the DRM.
Cheers,
Cameron Simpson <cs(a)cskk.id.au>
5:16 p.m.
New subject: OT: backing up a DVD
On 9/13/18 7:57 AM, JD wrote:
So, how in tarnation can I back up this DVD.
What tool can I use that will use dvdcss AND
back up the DVD???
Acquired a DVD for testing. Verified, didn't explore, that there is a problem with
k3b reading the DVD even with libdvdcss-1.4.2-1.fc28 installed.
However, if you don't need the DVD duplicated and can live with the contents ripped
to a video file you can simply use "HandBrake". Seems I must have
done something like that when I purged my home of DVDs a few years back.
Anyway, I just used HandBrake to create a WINGSPAN.m4v from a DVD. The DVD contains
2 videos and the HandBrake GUI's menu finds both and
you can select which one to work on from a drop-down menu. I put the movie on my NAS
and accessed it from my TV over the network. Also, I could,
put the file on a USB drive and plug that into my TV. No need for a DVD player.
HandBrake is available in the rpmfusion-free repo and libdvdcss is in the
rpmfusion-free-tainted repo
https://www.amazon.com/Paul-McCartney-Wingspan-Intimate-Portrait/dp/B0000... (was
one of the DVD's a friend lent me)
--
Cardinal Rule of Presentations: "Tell them what you are going to tell them, tell
them, then tell them what you told them."
10:01 a.m.
New subject: OT: backing up a DVD
On Fri, Sep 14, 2018 at 4:16 PM, Ed Greshko <ed.greshko(a)greshko.com> wrote:
On 9/13/18 7:57 AM, JD wrote:
> So, how in tarnation can I back up this DVD.
> What tool can I use that will use dvdcss AND
> back up the DVD???
Acquired a DVD for testing. Verified, didn't explore, that there is a
problem with
k3b reading the DVD even with libdvdcss-1.4.2-1.fc28 installed.
However, if you don't need the DVD duplicated and can live with the
contents ripped
to a video file you can simply use "HandBrake". Seems I must have
done something like that when I purged my home of DVDs a few years back.
Anyway, I just used HandBrake to create a WINGSPAN.m4v from a DVD. The
DVD contains
2 videos and the HandBrake GUI's menu finds both and
you can select which one to work on from a drop-down menu. I put the
movie on my NAS
and accessed it from my TV over the network. Also, I could,
put the file on a USB drive and plug that into my TV. No need for a DVD
player.
HandBrake is available in the rpmfusion-free repo and libdvdcss is in the
rpmfusion-free-tainted repo
https://www.amazon.com/Paul-McCartney-Wingspan-Intimate-
Portrait/dp/B00005QJHL (was
one of the DVD's a friend lent me)
Well, I have been looking for a version of HandBrake that will compile and
run on
one of my older linux machines (F20), to no avail.
n But I found a friend who had SW on aMS Wndows machine, and he wass able
to copy it and put it on a flash drive for me.
Thanx to all who replied.
6:58 p.m.
New subject: OT: backing up a DVD
On 12Sep2018 17:40, JD <jd1008(a)gmail.com> wrote:
On 09/12/2018 04:39 PM, Cameron Simpson wrote:
>On 13Sep2018 08:29, Cameron Simpson <cs(a)cskk.id.au> wrote:
>>Regarding the DVD CSS stuff: I seem to recall from long ago that
>>reading a CSS DVD without the libdvdcss stuff to arrange decoding
>>produced read issues, not just garbled data. This might be that.
>
>Ah, here we go. In the tar-1.30 source, src/create.c, around line
>1104. The "shrank...padding" message happens if tar gets a short
>read (not an I/O error).
>
>So I think the VOB file read is very short. See if other tools can
>read that file, since it is a mounted drive.
>
>Cheers,
>Cameron Simpson <cs(a)cskk.id.au>
I tried that, and it is clear that tar is unable to read the drive. To wit:
$ ls -l VTS_10_1.VOB
-r--------. 1 jd jd 1073739776 Mar 18 2013 VTS_10_1.VOB
$ cat VTS_10_1.VOB | wc -c
cat: /run/media/jd/JACK_REACHER/VIDEO_TS/VTS_10_1.VOB: Input/output error
4067328
So, the output file was padded by zeros instead of the real McCoys!!!
In other words, dvdcss screwed up royally, and I cannot use the backup
as replacement if my DVD gets seriously damaged by a bad player drive.
Just wonderbar!!!!
I am suggesting that dvdcss is not involved in a DVD _mount_, so no decryption
occurs. Instead, I/O errors occur - you don't get encrypted VOB data, you get
no data.
Making an undecrypted backup of a CSS encrypted DVD is of little value without
a tool to use the encrypted data or away to burn a usable Video DVD from your
backup (players won't use an encrypted video anyway).
Mounting an unencrypted DVD isn't an issue, but commercial Video DVDs are
encrypted so unless the mount command contrived some decryption, tar or any
other CSS unaware tool isn't going to do you any good.
You are encountering all the pleasures of DRM, which is why we all hate it.
Backups are just one facet of the problem.
I speak as one with quite a few DVDs I'd like to make soft copies of. Not to
reburn working like-the-original DVDs again (because my hatred of most DVD menu
designs is like a searing flame) but to be able to watch them without having to
dig around a bookshelf, etc etc.
One day I need to spent a lot of time with handbrake or similar to get good MP4
rips of their video with decent metadata and filenames. Did I say "day"? Not
nearly long enough.
Cheers,
Cameron Simpson <cs(a)cskk.id.au>
10:52 a.m.
New subject: OT: backing up a DVD
On 09/10/2018 08:19 PM, Ed Greshko wrote:
On 9/11/18 8:53 AM, JD wrote:
> Using dd to back up a DVD (for in case dvd gets damaged), I am getting
> frequent messages like
> ..... File shrank by 1069672448 bytes; padding with zeros
>
> So, the .VOB file copied to HD is all messed up????
> I do not know yet, because the process is still in progress.
>
> In the past, I never had this issue, and I have seen many
> of my dvd's and CD's get damaged when inserted into friend's
> home entertainment centers, and had to rebuild them from HD backup.
>
> Any clues how to prevent this message coming from dd ?
Are you using only "dd" or are you also using "tar"? I only ask
since I've not seen
the message coming from "dd" but recall seeing it from "tar".
My bad!!! I had multiple tar instances running.
And you are right. dd was in another window,
and somehow it stuck in my mind when I started
to type my message.
Yes, it IS tar.
The DVD is mounted as
/run/media/jd/MODERN_DESIGN_CONCEPTS
and I was taring it out by the commands
cd /run/media/jd/MODERN_DESIGN_CONCEPTS/VIDEO_TS
tar cf - . | tar -C /sdc5/backups/dvd/MODERN_DESIGN_CONCEPTS -xpvf -
9:27 p.m.
New subject: OT: backing up a DVD
On 09/10/2018 05:53 PM, JD wrote:
Using dd to back up a DVD (for in case dvd gets damaged), I am
getting
frequent messages like
..... File shrank by 1069672448 bytes; padding with zeros
So, the .VOB file copied to HD is all messed up????
I do not know yet, because the process is still in progress.
In the past, I never had this issue, and I have seen many
of my dvd's and CD's get damaged when inserted into friend's
home entertainment centers, and had to rebuild them from HD backup.
Any clues how to prevent this message coming from dd ?
Thanx
JD,
"dd" does not work on DVD's. Use K3b instead:
# dnf install k3b
k3b also lets you do a check after you burn your DVD.
Keeps the "coasters" to a mind roar. You always
know when you have a good burn.
Also, consider using a flash drive. Much faster
and easier to use than a DVD.
HTH,
-T
5:04 a.m.
New subject: OT: backing up a DVD
On 18-09-10 22:27:00, ToddAndMargo wrote:
...
"dd" does not work on DVD's. Use K3b instead:
dd is fine for /reading/ DVDs. Something more (K3b or wodim or
growisofs) is needed to /write/ them.
--
____________________________________________________________________
TonyN.:' <mailto:tonynelson@georgeanelson.com>
' <http://www.georgeanelson.com/>
6:30 a.m.
New subject: OT: backing up a DVD
On 09/11/2018 03:04 AM, Tony Nelson wrote:
On 18-09-10 22:27:00, ToddAndMargo wrote:
...
> "dd" does not work on DVD's. Use K3b instead:
dd is fine for /reading/ DVDs. Something more (K3b or wodim or
growisofs) is needed to /write/ them.
dd is great to make an iso out of a dvd.
10:41 a.m.
New subject: OT: backing up a DVD
On Tue, Sep 11, 2018 at 4:31 AM ToddAndMargo <ToddAndMargo(a)zoho.com> wrote:
On 09/11/2018 03:04 AM, Tony Nelson wrote:
> On 18-09-10 22:27:00, ToddAndMargo wrote:
> ...
>> "dd" does not work on DVD's. Use K3b instead:
>
> dd is fine for /reading/ DVDs. Something more (K3b or wodim or
> growisofs) is needed to /write/ them.
>
dd is great to make an iso out of a dvd.
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Agreed, for backup image of your DVD, dd works fine:
umount [dvd mount point]
dd if=/dev/sr0 of/home/user/Videos/nameofdvd.iso bs=2048 conv=notrunc
status=progress
where sr0 is the dvd device, bs is the normal block size of the dvd (seemed
to make a difference when I first started doing this), don't truncate the
file, and progress for monitoring how much is done.
Been doing this for awhile and you can easily watch the file on vlc.
haven't tried other players so experiment. You cannot, however, copy onto
a stock blank dvd (it's too small). Like the old days of ripping CD to
preserve the original disk this is the same concept. Watch the file and
preserve the DVD. Local laws apply ofc.
hih,
fred
10:44 a.m.
New subject: OT: backing up a DVD
On Tue, Sep 11, 2018 at 8:41 AM fred roller <fredroller66(a)gmail.com> wrote:
On Tue, Sep 11, 2018 at 4:31 AM ToddAndMargo <ToddAndMargo(a)zoho.com>
wrote:
> On 09/11/2018 03:04 AM, Tony Nelson wrote:
> > On 18-09-10 22:27:00, ToddAndMargo wrote:
> > ...
> >> "dd" does not work on DVD's. Use K3b instead:
> >
> > dd is fine for /reading/ DVDs. Something more (K3b or wodim or
> > growisofs) is needed to /write/ them.
> >
>
> dd is great to make an iso out of a dvd.
>
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Agreed, for backup image of your DVD, dd works fine:
umount [dvd mount point]
dd if=/dev/sr0 of/home/user/Videos/nameofdvd.iso bs=2048 conv=notrunc
status=progress
where sr0 is the dvd device, bs is the normal block size of the dvd
(seemed to make a difference when I first started doing this), don't
truncate the file, and progress for monitoring how much is done.
Been doing this for awhile and you can easily watch the file on vlc.
haven't tried other players so experiment. You cannot, however, copy onto
a stock blank dvd (it's too small). Like the old days of ripping CD to
preserve the original disk this is the same concept. Watch the file and
preserve the DVD. Local laws apply ofc.
hih,
fred
quick correction
dd if=/dev/sr0 of=/home/user/Videos/nameofdvd.iso bs=2048 conv=notrunc
status=progress
forgot the equal sign after "of"... sorry.
11:22 a.m.
New subject: OT: backing up a DVD
On 09/11/2018 04:04 AM, Tony Nelson wrote:
On 18-09-10 22:27:00, ToddAndMargo wrote:
...
> "dd" does not work on DVD's. Use K3b instead:
dd is fine for /reading/ DVDs. Something more (K3b or wodim or
growisofs) is needed to /write/ them.
Yes. Wodim works just fine.
10:58 a.m.
New subject: [OFF LIST] Re: OT: backing up a DVD
Hi Todd and Margo,
I have not been able to use k3b because it did not
make use of libdvdcss, so it always terminated in error.
Are you saying that it has been fixed????
Thanx!!
JD
On 09/10/2018 08:27 PM, ToddAndMargo wrote:
On 09/10/2018 05:53 PM, JD wrote:
> Using dd to back up a DVD (for in case dvd gets damaged), I am getting
> frequent messages like
> ..... File shrank by 1069672448 bytes; padding with zeros
>
> So, the .VOB file copied to HD is all messed up????
> I do not know yet, because the process is still in progress.
>
> In the past, I never had this issue, and I have seen many
> of my dvd's and CD's get damaged when inserted into friend's
> home entertainment centers, and had to rebuild them from HD backup.
>
> Any clues how to prevent this message coming from dd ?
>
> Thanx
JD,
"dd" does not work on DVD's. Use K3b instead:
# dnf install k3b
k3b also lets you do a check after you burn your DVD.
Keeps the "coasters" to a mind roar. You always
know when you have a good burn.
Also, consider using a flash drive. Much faster
and easier to use than a DVD.
HTH,
-T
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6:13 p.m.
New subject: [OFF LIST] Re: OT: backing up a DVD
On 9/11/18 11:58 PM, JD wrote:
I have not been able to use k3b because it did not
make use of libdvdcss, so it always terminated in error.
Are you saying that it has been fixed????
It isn't clear to me if your initial problem was related to reading or writing a DVD.
That said, in another message you indicated that "Wodim works just fine". Well,
when
it comes to k3b, it uses (at least on my system) wodim as its method
for cdrecord. Check the settings in your k3b to verify what it is configured to use.
I've not had any issues with k3b in the past. I think I no longer have a commercial
DVD to test as I stopped using those a few years ago.
--
Cardinal Rule of Presentations: "Tell them what you are going to tell them, tell
them, then tell them what you told them."
6:55 p.m.
New subject: [OFF LIST] Re: OT: backing up a DVD
On 12Sep2018 07:13, Ed Greshko <ed.greshko(a)greshko.com> wrote:
On 9/11/18 11:58 PM, JD wrote:
> I have not been able to use k3b because it did not
> make use of libdvdcss, so it always terminated in error.
>
> Are you saying that it has been fixed????
It isn't clear to me if your initial problem was related to reading or writing a DVD.
If it is libdvdcss related then he wants to read a video DVD.
Also, IIRC, several of the DVD reading libraries use libdvdcss in an
opportunistic manner, meaning they're silent if it isn't present. JD, haveyou
tried simply making sure libdvdcss is installed? You error message might be a
side effect of the library being missing.
Cheers,
Cameron Simpson <cs(a)cskk.id.au>
7:16 p.m.
New subject: [OFF LIST] Re: OT: backing up a DVD
On 9/12/18 7:55 AM, Cameron Simpson wrote:
On 12Sep2018 07:13, Ed Greshko <ed.greshko(a)greshko.com> wrote:
> On 9/11/18 11:58 PM, JD wrote:
>> I have not been able to use k3b because it did not
>> make use of libdvdcss, so it always terminated in error.
>>
>> Are you saying that it has been fixed????
>
> It isn't clear to me if your initial problem was related to reading or writing a
DVD.
If it is libdvdcss related then he wants to read a video DVD.
Yes, of course. Yet that wasn't my point
Going through the thread he first mentions "So, the .VOB file copied to HD is all
messed up??" which does imply reading. Then elsewhere in the thread the subject of
"wodim" comes up, which implies writing.
Since he didn't reveal his precise method of "backing of a DVD" I found it
confusing. I suppose I could just make assumptions. But that tends to cause me more
trouble than what it is worth.
Also, IIRC, several of the DVD reading libraries use libdvdcss in an opportunistic
manner, meaning they're silent if it isn't present. JD, haveyou tried simply
making
sure libdvdcss is installed? You error message might be a side effect of the
library being missing.
If you're referring to the "error message" of "file shrank" then
it has already been
established that to have been a red herring.
--
Cardinal Rule of Presentations: "Tell them what you are going to tell them, tell
them, then tell them what you told them."
9:50 a.m.
New subject: [OFF LIST] Re: OT: backing up a DVD
On 09/11/2018 05:55 PM, Cameron Simpson wrote:
On 12Sep2018 07:13, Ed Greshko <ed.greshko(a)greshko.com> wrote:
> On 9/11/18 11:58 PM, JD wrote:
>> I have not been able to use k3b because it did not
>> make use of libdvdcss, so it always terminated in error.
>>
>> Are you saying that it has been fixed????
>
> It isn't clear to me if your initial problem was related to reading
> or writing a DVD.
If it is libdvdcss related then he wants to read a video DVD.
Also, IIRC, several of the DVD reading libraries use libdvdcss in an
opportunistic manner, meaning they're silent if it isn't present. JD,
haveyou tried simply making sure libdvdcss is installed? You error
message might be a side effect of the library being missing.
Cheers,
Cameron Simpson <cs(a)cskk.id.au>
Thank you Cameron.
Yes it is indeed installed.
To wit:
$ ll /usr/lib64/libdvd*
lrwxrwxrwx. 1 root root 18 Jan 29 2017 /usr/lib64/libdvdcss.so
albeit, it is of a slightly older vintage.
9:40 a.m.
New subject: [OFF LIST] Re: OT: backing up a DVD
On 09/11/2018 05:13 PM, Ed Greshko wrote:
On 9/11/18 11:58 PM, JD wrote:
> I have not been able to use k3b because it did not
> make use of libdvdcss, so it always terminated in error.
>
> Are you saying that it has been fixed????
It isn't clear to me if your initial problem was related to reading or writing a
DVD.
That said, in another message you indicated that "Wodim works just fine".
Well, when
it comes to k3b, it uses (at least on my system) wodim as its method
for cdrecord. Check the settings in your k3b to verify what it is configured to use.
I've not had any issues with k3b in the past. I think I no longer have a commercial
DVD to test as I stopped using those a few years ago.
This is the problem of
responding to some responders that bring in
the use of some utils to do something other than what I had tried
to report. A responder brought up the names of those utils, and I
merely ascented that they do work. I should have alsos stated that
it was not what I was trying to do.
I did state in my correction of my original post that I was tarring
from the directory on which the dvd was mounted to a hard drive
dir - and that the error message (if it really were an error) was indeed
from tar.
So, I was seeking to see if anyone knew how to prevent the condition
that ejected that error message.
Unfortunately, I have not seen anyone posting a panacea for it.
7:49 p.m.
New subject: [OFF LIST] Re: OT: backing up a DVD
On 09/11/2018 08:58 AM, JD wrote:
Hi Todd and Margo,
I have not been able to use k3b because it did not
make use of libdvdcss, so it always terminated in error.
Are you saying that it has been fixed????
I never knew it was broken. Use it all the time
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