Alright. Actually i need mostly the mp4 format. But if it is possible to get for other types as well that would be nice. I just need to read the duration of the file. How can i do that with C# 4.0 ?
So the thing i need is like this video is like :
13 minutes 12 seconds
You can use DirectShow API
MediaDet object, through DirectShow.NET wrapper library. See Getting length of video for code sample,
get_StreamLength gets you the duration in seconds. This assumes Windows has MPEG-4 demultiplexer installed (requires third party components with Windows prior to 7, I believe the same applies to another answer by cezor, there are free to redistribute components though).