How to manually attach NvDsBatchMeta (like nvstreammux does)

[philipp.schmidt]

The best response in this forum so far regarding this “batched” NVMM is maybe this:

Convert OpenCV Mat to NvBufSurface

Hello everyone, I’m creating a preprocessing element that performs some opencv operations on the image, and this element will come just before nvinfer. The logic of the element is as follows: Obtain a cv::Mat from NvBufSurface Perform opencv operations Create a new NvBufSurface Populate the new surface with the data from the cv::Mat Unref the input buffer The reason I’m discarding the original buffer is because I need to send the original frames along with a few copies of the frame, with som…

Looks like this is how to instantiate a NvBufSurface and wrap it in a GstBuffer via exposing the pointer to NvBufSurface directly to gst_buffer_new_wrapped_full. But I would like some comments from Nvidia first before I try this.