how to find the run time of a media file

hi ranchers,

I am developing a web application where a user can upload media files of format *.avi,*.mpeg ect. Now i have to calculate the run time of that media file and put the same in the database along with the file. The run time is something like when we run a avi file in media file we can see the total run time in status bar. i have to implement exactly that thing.
i have no clue about how do do this stuff. I just found javax.sound api but that's not helpfull in my case.can somebody please suggest something.

There is nothing specific in JSP for doing this.
Moving to General Computing.

There are various Java APIs for dealing with media formats, e.g. JMF from Sun (although I believe that's come to a dead end in its life), and QuickTime from Apple. Both can play various formats, and should be able to tell you how long the runtime is.