WMA 9/10 Pro/Lossless specification or standardization?

[ToddG]

So I'm looking for information on WMA format specification and whether or not it's an open standard like VC-1 is and if there's an encoder/decoder specification available. I've done extensive googling and searched these forums without finding anything, but it makes sense to me that there's probably an acompaning audio standard/spec to go with VC-1, that I'm hoping is compatible with WMA.

[jruggle]

So I'm looking for information on WMA format specification and whether or not it's an open standard like VC-1 is and if there's an encoder/decoder specification available. I've done extensive googling and searched these forums without finding anything, but it makes sense to me that there's probably an acompaning audio standard/spec to go with VC-1, that I'm hoping is compatible with WMA.
That's a definite no. Not open, no specification. Some of it has been reverse-engineered though. FFmpeg already has a basic wma decoder, and a wmapro decoder is in the processing of being included into the main codebase. However, reverse-engineering wma lossless is not on the radar AFAIK.

[Midzuki]

but it makes sense to me that there's probably an acompaning audio standard/spec to go with VC-1, that I'm hoping is compatible with WMA.

Whereas VC-1 was designed to be "container-agnostic" :) , all types of WMA were designed to fit on the ASF container especifically. Apart from the questionable quality of its non-lossless modes :D , Windows Media Audio can lead to sync issues after careless format conversions, because of its variable-samplerate nature. Besides ASF, only Matroska supports WMA streams correctly (AFAIK, at least).