When importing video from an analog source (such as a VCR) using a DV converter, you may see distortion at the edges of the image.
Some analog sources may produce distortion or noise outside of the "TV safe" area of the image. Most television screens "overscan" so that the outer edges of the image are not normally visible. When importing footage from a VCR or other analog source using a DV converter, you may see these parts of the image because iMovie shows the full frame of information.
If you want to mask or remove the distortion from the edges of your final project, consider using iMovie's Letterbox effect (available in iMovie HD 5 or later) to cover the distortion at the top or bottom of frame. Alternatively, apply a third-party effect, if you have one, to pillarbox or windowbox the footage, or an effect which can zoom or crop the image.
Important: Information about products not manufactured by Apple is provided for information purposes only and does not constitute Apple's recommendation or endorsement. Please contact the vendor for additional information.