Convert YUV420 NvBuffer to BGR

Autonomous Machines Jetson & Embedded Systems Jetson TX2
1

Hi guys,

I use L4T 28.2.1 and a IMX274 camera.
I would like a RGB/BGR cv::mat at the end of the acquisition.

Currently, using Argus API I have an image in an NvBuffer accessible by the dmabuf-fd.

How can I convert YUY420 NvBuffer to BGR ? Is it possible using VIC ?

Thanks

2

hello pecchioli.mathieu,

please refer to Topic 1047563 to demonstrate tegra_multimedia_api + OpenCV GpuMat.
thanks

3

Hello JerryChang,

Thank you for your quick reply.

If I well understand the patch in attachment, the conversion to a OpenCV GpuMat is done using a renderer to retrieve an EGLImageKHR. But I do not want to use a screen and therefore can not initialize the renderer.
Is it possible to recover the image in another way from the fd memory handle?

4

hello pecchioli.mathieu,

please refer to Accelerated GStreamer User Guide from [Release 28.2 Development Guide]-> [Related Documentation]
you may refer to gst-nvivafilter plugin in page.20 to perform CUDA post-processing for your use-case.
thanks