Merging audio(.wav) and video(.mov) file from local file system using Java

Hi All,
I am trying to merge the audio and video files from local file system using JMF.
But when I use the method, it shows the following error:
"Cannot find a processor for PullDataSource"
The same piece of code is able to merge video and audio captured directly from my laptop's sound recorder and web cam into a *.avi file.
But when I use to merge local files, the above exception is thrown.
I am searching on net from last two weeks but this issue is not solved yet.
Please try to solve this issue, because my project deadlines are near now.
Hoping for a reply.