Autodesk 64006-051108-9001 User Guide - Page 43

The Project Window 35 • 2.21:1 - Wide aspect ratio used for some theatrical movies. • Custom - To access the Aspect window and input any aspect ratio. When you make a selection, the Project window displays the source movie at the new ratio. Note: The raw pixels option enables you to view the video in its "unmodified" state and is used in cases where the video does not fit one of the other aspect ratio choices or if the aspect ratio is unknown. When you view a previously corrected and cropped movie in the raw pixels aspect ratio, the manual cropping rectangle is automatically adjusted so that the cropping matches what you originally specified on the corrected display. Frame Format Progressive Top Field Bottom Field The Frame Format options control how the source video is assembled into frames for processing. Always use Progressive source material when you can. Computers and many newer cameras generate progressive scan video. Each NTSC or PAL video frame consists of alternating top and bottom fields. A television draws one field every 1/59.94 of a second for NTSC and every 1/50 of a second for PAL. Our eyes put the two alternating fields together to create 29.97 whole NTSC frames per second or 25 whole PAL frames. If you have interlaced source material, be sure to set the Frame Format to match the source. Fields are recorded sequentially and must be combined into frames in the proper order or the resulting movie will have horizontal "jitter" on moving edges. You can set the default in cleaner > Preferences > Processing. See "Source Frame Format" on page 238.