Identifying discs that share identical volume ids

[sentrywasbored]

Hi, for a project I am working on, I need to identify what disc is in the drive. Simple, right? Well, despite being vastly different, they all share the exact same volume label. I tried identifying based on the MD5 of VIDEO_TS.IFO file but this reports wildly inconsistently amongst identical discs. anyone got any ideas?

Sentry
thesentrygames@gmail.com
https://www.github.com/sentrywasbored

[Selur]

Not sure whether it helps, but iirc. https://github.com/beandog/dvd_info uses libdvdread and can report the 'disc ID'.

[cholla]

You did not say if these are burned disks or commercial disks.

ImgBurn gives information.
Nero CDSpeed or Nero InfoTool might.
avinaptic2
Maybe this one:
http://dvd.identifier.cdfreaks.com/

[sentrywasbored]

these are commercial CSS encrypted disks that although contain wildly different contents, all have the same label

[Selur]

You could calculate the hash of the smallest vob file (> 0) and use that as id.