The interlaced scanning methods are relevant only for moving picture files – avi, QuickTime (mov), wmv, mpg etc., and are normally relevant only to sources that were captured at TV frame-rates of 25i (PAL) and 29.97i (NTSC). Film frame-rate of 24p and 23.98p do not normally employ interlaced scanning. Your choice of scanning method in QMX must depend on the method in which the source was captured on camera and/or created in post-production. Normally video files from television cameras and digital cameras, captured for television broadcast, will be shot as interlaced. The Interlaced scanning method saves each frame of the image as two separate halves known as “fields”. Each field contains only the ODD lines or EVEN lines of an image and both fields are separated by a temporal distance of 1/50th of a second. Combining these two fields does not normally produce a very good quality image – but must be done in order to ensure that a DCP is DCI compliant.
