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Using square-pixel footage for output to DV
You can use square-pixel footage in a DV project and generate output that does not appear distorted. Premiere either upsamples (increases) the resolution or downsamples (decreases) the resolution of a file that does not match the project frame size. Because downsampling results in a higher-quality image, it is best to create files that are larger than the project's frame size so that Premiere does not have to upsample and enlarge the file.
To use square-pixel files in a D1 or DV project:
1 Prepare square-pixel footage using one of the following methods:
If your final output is DV (NTSC), create and save it at a 720 x 540 frame size to prevent upsampling, or 640 x 480 to prevent field distortion on a field-rendered file (such as a 3D animation). If your final output is DV (PAL), create and save it at a 768 x 576 frame size to prevent upsampling and field distortion on a field-rendered file (such as a 3D animation).If your final output is D1 (NTSC), create and save it at a 720 x 540 frame size.
2 Capture or import the file into Premiere.
3 If you cannot use the methods from step 1, do whichever of the following is necessary:
If your square-pixel file was created and saved at an odd size or a smaller frame size than that used by your project (for example, if you imported a 400 x 400 logo prepared in Illustrator or a scanned image intended to be superimposed onto the video), select it and choose Clip > Video Options > Maintain Aspect Ratio. The Maintain Aspect Ratio option prevents the image from being resized to fit the frame and makes Premiere resample the image using the same nonsquare pixel aspect ratio as the project.If your square-pixel file was created and saved at a standard frame size (such as 640 x 480 or 720 x 540), Premiere will scale the image so that the pixel aspect ratio, frame aspect ratio, and frame size match the project. For best results, create files with a frame size in which one dimension matches that of the project and the other is greater than the project--so that Premiere downsamples rather than upsamples. If your square-pixel file was created and saved at the frame size used by your project (such as 720 x 480), you'll want to redesign your image using a different frame size (such as 720 x 540).
Capturing and Importing Source Clips > About D1, DV, and various pixel aspect ratios > Using square-pixel footage for output to DV
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