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I've installed VLC, libdvdread4, libdvdcss, Medibuntu and Ubuntu restricted extras AND ran this line of code...

sudo /usr/share/doc/libdvdread4/

...on my Ubuntu 12.04 but whenever I start a DVD, whether it be with or without DVD menus the VLC player does not play. When I run it without a DVD menu, I'm returned with this...

Playback failure:
DVDRead could not read -1/4 blocks at 0x01.

If I attempt to change the region set using regionset to 1 then I am returned with this...

ERROR: Region code could not be set!

I've tried running the DVD on Gnome MPlayer to no avail. Help me fix this.

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Have you tried installing win32codecs? i had the same problem on 13.04, but now i solved it. Try this...

$ sudo apt-get install win32codecs

for 32 bit systems, or maybe...

$ sudo apt-get install win64codecs

for 64 bit

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