Im not sure whats wrong with the aspect, it may be that is is 16:9 but not anamorphic, so its letterboxed.Like a film called Leon, the box says its 16.9, but the movie its self is 4.3 because its letterbox. ConvertToYUY2(interlaced=true), this wont affect of damage the progressive film, well i dont think so.Its defualted to interlaced=true, this way if you have a interlaced source its already set, where if it was just ConvertToYUY2 u may forget to and interlaced=true. But you can change it if you want, for progressive use ConvertToYUY2(interlaced=false)