System Information

// example for python user
OpenCV python version: 4.7.0
Operating System / Platform: Ubuntu 18.04
Python version: 3.7.16

Detailed description

image = frame.convertTo(cv2.CV_32F)

cv2.error: OpenCV(4.7.0) /data/work/opencv-cuda-4.7.0/opencv-4.7.0/modules/core/src/matrix_wrap.cpp:342: error: (-213:The function/feature is not implemented) getGpuMat is available only for cuda::GpuMat and cuda::HostMem in function 'getGpuMat'

I use cv2. Cudacodec. CreateVideoReader() read the video streaming, Mat type for <cv2.cuda.GpuMat 0x7f826b934a50>; The data type is 8UC4 and I tried to convert the data type to float32 but got an error

Steps to reproduce

cap = cv2.cudacodec.createVideoReader(file_path)
ret, frame = cap.nextFrame()
image = frame.convertTo(cv2.CV_32F)

Issue submission checklist

• I report the issue, it's not a question
• I checked the problem with documentation, FAQ, open issues, forum.opencv.org, Stack Overflow, etc and have not found any solution
• I updated to the latest OpenCV version and the issue is still there
• There is reproducer code and related data files (videos, images, onnx, etc)