Have just bought TMPGEnc MPEG Editor (Its no longer free!) and have cut sections from a 1hr 53 min long MPEG2 video clip (1,779,089 KB),making it exactly 1hr long. When I come to save the shortened clip as a 'Common MPEG' file it fails with the message insufficient disk free space available, 6.53 GB free space needed. I am saving to a partition with 3.83 GB of free space so clearly it is not enought. But can anyone explain why such a comparatively short video clip requires such a lot of free space to be saved?