An cross-plat media library, available for DNX451 / DNXCORE50 / NET45 / NET46
When you run it at first time, it will take a few minutes to restore some resources.
It is easy to convert a video or image format:
var media = new Video("C:\\test\\test.flv");
media.Convert(".mp4", Quality.Smallest).SaveAs("C:\\test\\test.mp4");