Can I output webcam feed from a Jetson Nano to multiple windows in MATLAB R2022a?

I'm trying to use the "MATLAB Coder Support Package for NVIDIA Jetson and NVIDIA DRIVE Platforms" to pull the video feed from 2 webcams connected to a Jetson Nano. However, when I try to use the "image" function from this support package, only one window opens which displays the video from both streams (which causes a blinking effect when I try to put this in a loop). Is there a way to output each camera's video feed to a separate window?

Answer 1

[MathWorks Support Team]

As of release R2022a, the "image" function from the MATLAB Coder Support Package for NVIDIA Jetson and NVIDIA DRIVE Platforms does not support multiple windows. However, one workaround is to capture an RGB image output array from each camera using the "snapshot" function, concatenate the RGB image output arrays and display them both in a single window. This workaround assumes that the camera outputs are the same resolution. The following is an example code for implementing this workaround:

% set up to read from webcams
hwobj = jetson;
c1 = camera(hwobj,"HD Pro Webcam C920",[640 480],'VideoDevice','/dev/video0');
c2 = camera(hwobj,"HD Pro Webcam C920",[640 480],'VideoDevice','/dev/video1');
d = imageDisplay(hwobj);

% take and save an image
img = snapshot(c1);
img2 = snapshot(c2);

% concatenate and output RGB image arrays
image(d, [img img2]);