How to convert cv::Mat to NvBufSurface without memcpy

[AastaLLL]

Hi,

1. Please check below for a comment:

OpenCV Mat to NvBufSurface (to use in NvBufSurfTransform)

Hi, Please check the code in deepstream_sdk_v4.0.2_jetson\sources\gst-plugins\gst-dsexample\gstdsexample.cpp The working solution is to create RGBA buffer through NvBufSurfaceCreate(), and map it to cv::Mat // Map the buffer so that it can be accessed by CPU if (NvBufSurfaceMap (dsexample->inter_buf, 0, 0, NVBUF_MAP_READ) != 0){ goto error; } // Cache the mapped data for CPU access NvBufSurfaceSyncForCpu (dsexample->inter_buf, 0, 0); // Use openCV to remove padding and conv…

2. Based on the description, it should include a copy step.
https://docs.nvidia.com/jetson/archives/r35.2.1/ApiReference/group__ds__aaa.html#ga001206f7623c36d0dadbdc39906162c7

Thanks.