(source origin: http://www.cinemasquid.com/blu-ray/tools/bdinfo) (I am not the original Author of this tool)
The BDInfo tool was designed to collect video and audio technical specifications from Blu-ray movie discs, including:
The BDInfo source code is licensed under the LGPL 2.1.
The free tool Microsoft Visual C# 2010 Express can be used to build the source code.
Occasionally inaccurate bit-depth measurement on Dolby TrueHD and DTS-HD Master audio streams.
BDInfo will NOT function correctly with copy-protected discs. You will have to decrypt commercial Blu-ray movie discs before you will be able to gather any info.