Autodesk 64006-051108-9001 User Guide - Page 49

Numeric Cropping, Preventing Distortion, Verify that the video looks normal in the Project window.

Page 49 highlights

Cropping 41 Numeric Cropping Numeric cropping and scaling can be done via the Settings > Image Tab. See "Crop" on page 62. Preventing Distortion When producing movies with aspect ratios that are different from the source movie, you must crop the source to prevent distortion. If you look at the source movies of the project at their full 720x480 pixel resolution, displayed with Raw (square) pixels, they will look distorted. Objects in the 4:3 aspect ratio version will look too wide, and those in the 16:9 will look too narrow. However, when displayed at their correct aspect ratio, they both look normal. For example, if the source is shot in 4:3 aspect ratio and you want to make a 16:9 version, you must crop off some of the top and bottom to make the final movie match the widescreen format. If you do not crop, the 4:3 image stretches to the 16:9 aspect ratio, and the subject becomes very wide. Similarly, if the source is shot in 16:9 aspect ratio and you want to display it at 4:3, you must crop the sides to make it appear undistorted. If you do not, the subject appears too narrow. Calculating the correct way to crop movies can be very difficult when converting from one aspect ratio to another. Cleaner compensates for non-square pixels when displaying the source movie and also automatically calculates the correct manual cropping proportion so that what you see when you draw the cropping rectangle is the final, undistorted image. To prevent image distortion: 1. Verify that the video looks normal in the Project window. 2. If the video appears distorted, use the display aspect menu to correct it. 3. Choose a crop aspect ratio in the menu and draw a cropping rectangle. Note: When processing movies, Cleaner always displays the final video in the Output window in square pixels. This enables you to accurately see the actual pixels of the final movie so that you can watch for compression artifacts. If the output has a non-square ratio, it looks distorted in the Output window. This is normal. Open the movie on the target playback computer to make sure that it is correctly displayed.

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Cropping
41
Numeric Cropping
Numeric cropping and scaling can be done via the Settings > Image Tab. See “Crop” on page 62.
Preventing Distortion
When producing movies with aspect ratios that are different from the source movie, you must
crop the source to prevent distortion.
If you look at the source movies of the project at their full 720x480 pixel resolution, displayed
with Raw (square) pixels, they will look distorted. Objects in the 4:3 aspect ratio version will
look too wide, and those in the 16:9 will look too narrow. However, when displayed at their
correct aspect ratio, they both look normal.
For example, if the source is shot in 4:3 aspect ratio and you want to make a 16:9 version, you
must crop off some of the top and bottom to make the final movie match the widescreen format.
If you do not crop, the 4:3 image stretches to the 16:9 aspect ratio, and the subject becomes very
wide. Similarly, if the source is shot in 16:9 aspect ratio and you want to display it at 4:3, you
must crop the sides to make it appear undistorted. If you do not, the subject appears too
narrow.
Calculating the correct way to crop movies can be very difficult when converting from one
aspect ratio to another. Cleaner compensates for non-square pixels when displaying the source
movie and also automatically calculates the correct manual cropping proportion so that what
you see when you draw the cropping rectangle is the final, undistorted image.
To prevent image distortion:
1.
Verify that the video looks normal in the Project window.
2.
If the video appears distorted, use the display aspect menu to correct it.
3.
Choose a crop aspect ratio in the menu and draw a cropping rectangle.
Note:
When processing movies, Cleaner always displays the final video in the Output
window in square pixels. This enables you to accurately see the actual pixels of the final
movie so that you can watch for compression artifacts. If the output has a non-square ratio,
it looks distorted in the Output window. This is normal. Open the movie on the target
playback computer to make sure that it is correctly displayed.