How to know which video formats my WPF application can play?

Question

I have a small application that allows the playback of videos. First off, I do not restrict the user to select particular types of file. What I want to do is make sure I can

Answer 1

Why don't you:

1. Try to play it
2. if you immediately get an error from the media element, it isn't supported.

You could always make the media element hidden while you did this. This will be much more reliable than any attempt to pre-calculate what is and isn't supported.