I've installed the media player vlc and added the current user to the optical group.# sudo pacman -S vlc qt4# sudo gpasswd -a <my_user> opticalAfterwards I restarted my computer and plugged the USB DVD device inluding a DVD into the computer. I found the device at /dev/sr0 and mounted it manually to /mnt/dvd.# lsblkNAME   MAJ:MIN RM   SIZE RO TYPE MOUNTPOINTsda      8:0    0 119,2G  0 disk ...sr0     11:0    1   6,3G  0 rom  /mnt/dvdThen I opened the VLC player GUI and selected the device. When I close the dailog with pressing play, then I hear the USB device starting. But after a couple of seconds it stops and nothing happens anymore. There is no error message or something else.How can I play the DVD from USB device?
Play DVD with VLC from USB device
arch linux;usb drive;vlc;dvd
I found a solution, which was also described in the ArchWiki. While the packages libdvdread and libdvdnav are dependencies of the package vlc, the package libdvdcss was missing. The vlc player gave me no hint, but after installing the package, I can view the movie.sudo pacman -S libdvdcssAfterwards I found a blog post, which mentions the error message Media stream scrambled/encrypted. I could'nt find any error message.