The maximum frame size to import still images and movies is 256 megapixels, with a maximum dimension of 32,768 pixels in either direction. For example, an image that is 16,000×16,000 pixels is acceptable, as is one that is 32,000×8,000, but an image that is 35,000×10,000 pixels cannot be used. Please use After Effects if you need to work with files bigger then 256 megapixels. More info: https://helpx.adobe.com/mena_en/premiere-pro/using/supported-file-formats.html
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