I don't know where to put this, but it seems to be more of a hardware issue than a software issue. I have a DVD-R that I recorded from my DVD recorder. I tried running it from Movie Player, but, to my surprise, it wouldn't work. I tied VLC and its fine.

Thats not the problem though. I am trying to get some screen grabs from the VOB using ffmpeg, but I can't find the directory containing the VOB files! According to VLC, its /dev/sr0 but this is denoted as a special block device. How can I access it using non video playback tools?

In case anyone is concerned, this is a non-copyright issue.

Thanks!

Paul
PS If this will help I am using Ubuntu 10.4

Mount the disk, and you'll find them in the VIDEO_TS directory.

What would the mountpoint be?

Whatever you want it to be.

will mount it on /mnt. If you mount it through a graphical file manager (possibly by right-clicking on the drive and choosing "mount"), then the mountpoint will be /media/<volume label>.

If you mean that the DVD isn't CSS-encrypted, then mounting it will give you access to the data in the VOBs. If you mean anything else, then you'll have to decrypt and rip it instead. Use vobcopy or tccat (tccat is part of transcode).

Things seem to be going amiss. I've tried "mount /dev/sr0 /mnt" (with and without the sudo prefix) but all I get is "mount: block device /dev/sr0 is write-protected, mounting read-only
p" I don't care if its read only, but I still can't see the innards.

Success!

Look at /mnt in nautilus, and you'll now see the files on the drive.

If that's not working, then please paste the results of the following commands into your reply:

• cat /etc/mtab
• ls /mnt

Still woes beckon... :-(

cat /etc/mntab gives.....:

/dev/sda1 / ext4 rw,errors=remount-ro 0 0
proc /proc proc rw,noexec,nosuid,nodev 0 0
none /sys sysfs rw,noexec,nosuid,nodev 0 0
none /sys/fs/fuse/connections fusectl rw 0 0
none /sys/kernel/debug debugfs rw 0 0
none /sys/kernel/security securityfs rw 0 0
none /dev devtmpfs rw,mode=0755 0 0
none /dev/pts devpts rw,noexec,nosuid,gid=5,mode=0620 0 0
none /dev/shm tmpfs rw,nosuid,nodev 0 0
none /var/run tmpfs rw,nosuid,mode=0755 0 0
none /var/lock tmpfs rw,noexec,nosuid,nodev 0 0
none /lib/init/rw tmpfs rw,nosuid,mode=0755 0 0
binfmt_misc /proc/sys/fs/binfmt_misc binfmt_misc rw,noexec,nosuid,nodev 0 0
gvfs-fuse-daemon /home/paul/.gvfs fuse.gvfs-fuse-daemon rw,nosuid,nodev,user=paul 0 0
/dev/sr0 /media/disk udf ro,nosuid,nodev,uhelper=udisks,uid=1000,gid=1000,iocharset=utf8,umask=0077 0 0
/dev/sr0 /home/paul/DVD udf ro 0 0
/dev/sr0 /mnt udf ro 0 0

as for ls /mnt, I get....
paul@paul:~$ ls /mnt
ls: cannot access /mnt/VIDEO_TS: Permission denied
VIDEO_TS

A permission problem. Bad. I wonder if searching for that on Google or the Ubuntu forums would turn up anything...

What happens with ls /media/disk/VIDEO_TS, since it's mounted there too, but with different permissions? Can you ls either directory as root (or with sudo)?

paul@paul:/$ ls /media/disk
ls: cannot access /media/disk/VIDEO_TS: Permission denied
VIDEO_TS

Can you ls either directory as root, or with sudo?

Google searches are indicating that this is actually a documented problem:

https://bugs.launchpad.net/ubuntu/+s...hal/+bug/72872
https://bugs.launchpad.net/ubuntu/+s...nux/+bug/10550

And remember, in post #4 I mentioned plan B...

I can't su with Ubuntu 10.4, but "sudo ls" does return an inventory of the directory. I can "ls" as non-su.

Then it sounds like the problem is solved. You've mounted the drive, and you can access the VIDEO_TS folder with sudo.

It does look that way, my friend. I have done a:

paul@paul:/$ sudo cp /mnt/VIDEO_TS/*VOB /home/paul/VOB/
cp: cannot stat `/mnt/VIDEO_TS/*VOB': No such file or directory

What do you get from the following commands:

paul@paul:/$ sudo ls /mnt
VIDEO_TS

paul@paul:/$ sudo ls /mnt/VIDEO_TS
VIDEO_TS.BUP VTS_01_0.IFO VTS_02_1.VOB VTS_04_0.BUP VTS_05_0.IFO
VIDEO_TS.IFO VTS_01_1.VOB VTS_03_0.BUP VTS_04_0.IFO VTS_05_1.VOB
VIDEO_TS.VOB VTS_02_0.BUP VTS_03_0.IFO VTS_04_1.VOB
VTS_01_0.BUP VTS_02_0.IFO VTS_03_1.VOB VTS_05_0.BUP