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In my experience, to achieve high speeds or to be able to access/modify certain camera config parameters I've always needed the manufacturer's SDK.

My usual approach is to use the manufacturer's SDK to allocate a memory buffer and save the sequence there. When capture of the sequence is finished, then I convert the images to the OpenCV format (or directly create the Mats with the data pointer pointing to this buffer). This is not a real-time process, but I've been able to capture at around 1000 FPS.