Encoding using FFMPEG to WMV8 format, does it require license?

My software will be using ffmpeg to encode to WMV 8 format and I would like to know whether there's any licensing I need to go through or royalties paid to microsoft. I've tried to read through the windows media licensing page but its all very confusing to me. I hope someone can let me know the simple answer on whether I need any special licensing or royalties to be paid to Microsoft.

You don't need to pay royalties.

If you are an ISV and you want to obtain the tools to create and distribute a Windows-based application that reads, writes, and edits files in the Windows Media Format, such as players or content-creation, editing, and encoding applications, do one of the following:

• For Windows Vista, download the Windows Media Format 11 SDK.
• For Windows XP, download the Windows Media Format 11 SDK or Windows Media Format 9.5 SDK.
• For operating systems earlier than Windows XP, complete the Windows Media Format 9 Series SDK form.

http://www.microsoft.com/windows/windowsmedia/licensing/Licensing_Win_Apps_CustApp.aspx

Since it looks like theres no one else I'll try to clarify it myself.

If you download the software development kit (SDK) you can...'create and distribute a Windows-based application that reads, writes, and edits files in the Windows Media Format, such as players or content-creation, editing, and encoding applications'