How to read asf header in C#?

Question

Having a wma file, how can one parse the header using c#?

The purpose is to find the Key ID in the Content Encryption Object (that forms a part of the DRM license). Do you use the WM Format SDK or WM rights manager?

Answer 1

WMA files are in the ASF format. You can download the ASF specification from microsoft.

Answer 2

There is a WindowsMediaPlayer class in the framework. It can open asf files and read particular header flags (like prebuffer time), that other libraries (taglib) do not read.

Answer 3

There are sample code included in the Microsoft Media Format 11 SDK that display how to read headers from the ASF file format .

Good Luck!