using nvxio::Render to render off screen.

Autonomous Machines Jetson & Embedded Systems Jetson TX1
1

Im using the motion_estimation demo and want to render to a buffer off screen so that I can stream the resulting image over ethernet to a remote display. The TX1 is consuming raw RTP video and producing a second RTP stream with the rendered video (nothing ever goes to the screen).

nvxio::Render does not appear to allow you to access the rendered buffer after calling nvxio::Render::flush().

Does anyone know a way to access the vx_image from Render after its all the primitives have been processed?

2

Hi,

nvx_render support several option.
For example, if you execute

./nvx_demo_motion_estimation --nvxio_render video

nvxio::Render will output a video instead of display on the window.

Options:

VisionWorks library info:
	 VisionWorks version : 1.5.3
	 OpenVX Standard version : 1.1.0

./nvx_demo_motion_estimation: invalid value for option --nvxio_render: must be one of "default", "image", "stub", "video", "window" (got "test")

Would you want to give it a try first?

3

Thanks for the suggestion but I need to render the image off screen so that I can encode the video stream as RTP for streaming there is not display in my application and the box is effectively headless.

The quick solution was to ditch nvxio::Rendrer and use CUDA to render the motion directly into the RGBX buffer. In future I may try and used OpenGL to render my off screen buffer.

If anyone wants to know how I did this the code has been posted to github here: