Hi MSD,
Yes, SolveigMM Video Editing SDK w2.0 will meet your needs.
Please have a look at the doc:
http://solveigmm.com/files/SolveigMM_Video_Editing_SDK.pdf
SDK evaluation version can be found at this page:
http://solveigmm.com/?Products&id=EditingSDK
the SDK is fully compatible with .NET platform and has VB.NET sample, if it is necessary we can add C# sample.