bluray_copy is a program that ships with the bluray_info package of utils. You can use it to copy a track directly off a disc either to your drive, or to stdout.
You will need libaacs installed and a valid KEYDB.cfg file for copying. See Blu-ray DRM for details.
See bluray_copy –help.
bluray_copy - copy a Blu-ray title or playlist to a file
Usage: bluray_copy [path] [options]
Options:
-m, --main Copy main title (default)
-t, --title <#> Copy title number
-p, --playlist <#> Copy playlist number
-c, --chapter <#>[-#] Copy chapter number or range
Destination:
-o, --output <filename> Save to filename (default: bluray_title_###.m2ts)
--output - Write to stdout
Other:
-k, --keydb <filename> Location to KEYDB.cfg (default: ~/.config/aacs/KEYDB.cfg)
-a, --angle <#> Video angle (default: 1)
-h, --help This output
--version Version information
Blu-ray path can be a device, a filename, or directory; default is /dev/sr0
See man bluray_copy for instructions.