What's the difference between VC-1 AP and WMV9 AP?

[Chenny]

Yes, I know the basic difference between VC-1 and WMV9 from "VC-1 and Windows Media Video 9 FAQ".

But I am not that clear for the difference between VC-1 AP (WVC1) and WMV9 AP (WMVA) except the 4cc.

Could anybody tell me the detailed difference for their Codec principle, supported features & other info? Where can I get the detailed infomation for the AP?

Thanks very much!

[Inventive Software]

WMVA was based on a draft VC-1 proposal, and is not spec compliant. http://en.wikipedia.org/wiki/VC-1

[Chenny]

Yes. I'd like to know the difference between WVC1(Windows Media Video 9 Advanced Profile) and WMVA (WMV Advanced Profile).
1. The profile/level of WVC1 and WMVA is samilar. Right?
2. WMVA is not compliant with WVC1. Some software decoder supports WVC1, but not WMVA. But I don't know the detailed difference. Are they different from the Codec arithmetic?

Thanks very much!

[Inventive Software]

You could disassemble the decoders MS provide to see what the details are, but that'd probably go against the license...

[bond]

vc-1 ap is the public standard, everyone can implement an encoder following that standard

wvc1 is an encoder written by m$ following the vc-1 ap standard

wmva is an encoder written by m$ NOT following the vc-1 ap standard. it should not be used anymore