- Either the clip's resolution or its pixel aspect ratio (or both) do not match your project's settings. The following will help you understand the issue:
- See Tutorial:New Pixel Aspect Ratios
- See Adobe technical support document kb325883: Exported movie contains black bars on sides (Adobe Premiere Pro).
- See Aspect ratios in the Premiere Pro CS4 Help.
- See the following in the Premiere Pro CS3 Help:
- See also “Capturing or importing various aspect ratios” in the Premiere Pro 1.x help, especially the third bullet point.
- See also “About aspect ratios” and “Adjusting position, scale, rotation, and anchor point” in the Premiere Pro 1.x help.
- Be sure to read and understand the concepts in “What's an anamorphic DVD?”.
- Steven Gotz said:
The problem is that widescreen needs to have the lower number evenly divisible by both 9 and 8. There are only a few like that. 9X8=72 so use that as a starting point. On the small side, 72X3=216. That would be 384X216 using square pixels. (Width is height divided by 9 times 16)
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