ASP.Net: Upload of a video, create Thumbnail

in my asp.net page user can upload a video. On the upload-page there should be no video-player, instead there should be a picture of the video, like a thumbnail.

So how to create a 开发者_开发问答thumbnail / picture of a uploaded video?

---

Here is a link on SO that seems to answer the question: How do I get a Video Thumbnail in .Net?