Oh... well, yes, there should be more than one way for the vidder to handle it ahead of time. I don't really know what process you went through with the vidders, but if they sent you m2v files that were the wrong aspect ratio, they screwed up somewhere. I think I'm still not really understanding what you're asking. Each vidder should be correcting for the aspect ratio, in whatever program they're using and by whatever method they can, before they export to MPEG2.