Apple MA434Z/A User Manual - Page 130
Working With Extremely High-Resolution Images, AspectRatio
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AspectRatio This parameter is a multiplier that allows you to convert pixels of one aspect ratio into another aspect ratio-for example, from NTSC to PAL, or from high definition (square) to NTSC. The default value of 1 makes no change to the output. The following table contains common conversion values: Operation Square to NTSC (4:3) Square to PAL (4:3) NTSC (4:3) to Square (4:3) NTSC (4:3) to PAL (4:3) PAL (4:3) to Square PAL (4:3) to NTSC (4:3) Conversion Value 0.9140, or 1 if Fit is set to Resize 1.1111, or 1 if Fit is set to Resize 1.1111, or 1 if Fit is set to Resize 1, set Fit to Resize .9375, or 1 if Fit is set to Resize 1, set Fit to Resize Note: In some conversion cases, AspectRatio may be left at 1 if the Fit parameter is set to Resize, which rescales the image horizontally and vertically to match the new OutputRes. Fit The Fit parameter determines how an image fits into the new frame that's determined by the OutputRes parameter if the aspect ratio of the FileIn image is different than that of the final resolution set by the OutputRes parameter. There are two options: • Fit: Enlarges the image until either the vertical or horizontal resolution of the image matches that of the outputRes, depending on which is greater. This option maintains the original aspect ratio of the image, enlarging it as much as possible and leaving black to fill in the resulting gaps at the sides, or the top and bottom. • Resize: Rescales the vertical and horizontal resolution of the image so that it fits within the entire frame of the OutputRes. The image is stretched as necessary to fit the new resolution. Working With Extremely High-Resolution Images These guidelines are specifically for high-resolution images of 4K and 6K. The following discussion is based on the premise that you have a massive amount of RAM for your interactive workstation (at least 1 GB). Although Shake works with any resolution, there is a default crop on Viewers in the interface of 4096 x 4096 pixels. This protects the user in case a zoom of 1000 is applied to a 2K plate. Instead of trying to render an enormous image, only the lower-left corner up to 4096 pixels is rendered in the interface. This is fine for normal HD or film production, but the cropping takes effect if you read in 6K IMAX plates. This limitation is only in the interface-images rendered to disk are at the uncropped full resolution. 130 Chapter 3 Adding Media, Retiming, and Remastering
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