I want to crop an image in OpenCV and then pass it to DeepStream

I want to crop an image in OpenCV and then pass it to DeepStream.

I want to do real-time processing in this way.
First, connect a USB camera to the Jetson Nano.
USB camera → OpenCV → Partial Trimming → DeepStream → Object Detection & Trimming

How do I pass my OpenCV image processing to DeepStream?


Could you try this topic first?


How do I get the mapped_ptr, buf_params.pitch[0] passed to this function from the DeepStream SDK Python Binding?

cv::cuda::GpuMat(height, width, CV_8UC4, mapped_ptr, buf_params.pitch[0]);


It should look like this:

cv::cuda::GpuMat d_mat(dsexample->processing_height, dsexample->processing_width, CV_8UC4, eglFrame.frame.pPitch[0]);

Please find the corresponding in our python binding.

The data that corresponds to eglFrame.frame.pPitch[0] is not included in DeepStrem’s metadata, is it?


You can check this comment for the detail:

To access the image buffer, it’s required to register with EGL first.