I have a little personal website which has quite a few videos in flv format. The tool I am using to play these videos is called WimpyAV. It's pretty simple to use, lists files automatically, and allows me to easily resize it with percentages without breaking the AR of the video it's playing. However lately I've noticed a problem with it. The videos will cut off a few seconds early, with this time getting larger as the length of the video increases.

What I was thinking I could do as a really simple way of solving this problem is by adding a couple of seconds of blank video to the end of all the video files, but I'm not sure of any easy way of doing this. The videos start as xvid and I reencode them into flv from there.

Does anyone know of any easy way of doing this?
Or if you know another easy way of playing flvs on a website that autoscales video that would be good too.