So, Since Windows Media Video 9 Advanced Profile is the same as VC-1 Advanced Profile, and VC-1 AP is supported on Blu-ray, can you encode a Blu-ray compatible stream in Windows Media Encoder?
Nope, sorry. There are further constraints for Blu-ray VC-1 that need to be followed, and WME and the Windows Media Format SDK weren’t designed to support that level of constraint. The VC-1 Encoder SDK was designed with optical discs in mind, and can produce a Blu-ray compatible VC-1 elementary stream with products that expose it. Expression Encoder 2 doesn’t do elementary streams, but Rhozet’s Carbon Coder 3.12 and higher do.