CompressedDepth to numpy (or cv2)

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Folks,

I am using this link as starting point to convert my CompressedDepth (image of type: "32FC1; compressedDepth," in meters) image to OpenCV frames:

Python CompressedImage Subscriber Publisher

I get an empty data when I try to print, or I get a NonType when I see the result of my array, etc.

What is the right way to convert a compressedDepth image? Republishing is not gonna work do to wifi/router bandwidth and speed constraints.