I have been trying to convert Full HD 60fps mp4 video from my Videocamera to a more manageable PAL 25fps AVI file but when I do the video plays back at 2x speed (audio is okay). If I edit the file header to reduce the fps from 25 to 12 then it plays back okay-ish. I also noticed that the video runtime doubles in length so it looks like AVS gets confused somewhere along the line, unless I am doing something wrong?