Some video compression applications allow you to crop black bars which usually result from the anamorphic transformation. One is ffmpegX. You can do so with DiVA and Open Shiiva. In this video tutorial, we use QuickTime Pro to remove black bars. Having black bars that resulted from the anamorphic transformation leads to inefficient use of bits. Therefore, removing them reduces the file size of video.This video tutorial is not optimized for YouTube viewing. The entire video can be viewed for free at The original video is found at http://machouse.mhvt.net with the resolution of 720 x 540 pixels.\n\nQuickTime is a product of Apple Computer, Inc.\n\nCreative Commons license: Attribution anamorphic, Apple, bars, black, crop, cropping, Mac, MacHouse, matte, Pro, QuickTime, ratio, tutorial, video, VTC