Thread Subject: convert any video file format into avi file format in matlab

hai,
     Now i doing my video project in Image Processing,my query is how convert other video file format into (.avi) file formate. (because only avi file format video or movie read by matlab function)

for example: how convert (.flv) format into (.avi)

Help (mmreader) function is not found

I use Flash to Video Encoder Pro to convert flv and swf to another video formats, avi as well)
Simple program)