• Insert DVD
• open terminal (Applications>Utilities>Terminal)
• execute the follow commands
• mount
• This will list all mount points.  Locate the DVD drive (e.g. the DVD for cars would look like this: /dev/disk2 on /Volumes/Cars (iso, etc...)  The info you care about is the/dev/diskX
• /usr/sbin/diskutil unmount /dev/disk[x]  (where disk[x] is the one noted from above)
• /bin/dd if=/dev/disk[x] of=/Users/[username]/Desktop/[moviename].iso bs=2048 conv=noerror,sync
• The above step takes a while.  you may see some input/output errors but ignore them.

--------example errors------
dd: /dev/disk2: Input/output error
dd: /dev/disk2: Input/output error
230581+0 records in
230581+0 records out
472229888 bytes transferred in 1042.626063 secs (452924 bytes/sec)
dd: /dev/disk2: Input/output error


------------------------------

• /usr/sbin/diskutil mount /dev/disk[x]
• This remounts the DVD disc.
• Download VLC and open the iso directly with that application.  Let me know if you run into any issues.