How to use multiple USB webcam in Matlab

I can't preview 3 figure webcam same time in matlab. Can you help me?

[Walter Roberson]

Is the problem using 3 webcams, or is the problem with the 4th device specifically? If you only use

D = videoinput('winvideo', 4);
preview(D)

then is it able to preview it?

[Chau Trung]

Hi Walter RoberSon, thank for your comment, as i said i can preview each camera normally, but I can not preview three or more camera at the same time, not problem with the 4th camera, it occur an error as above. So can you figure it out for me?

Answer 1

[Stalin Samuel]

solution for similar problem

Answer 2

[Wenyin Wei]

Hello Trung,

I also met the problem and fixed it by making the cameras use different ports rather than sharing the same port.