imaqhwinfo webcam not detected!

Question

Sebastian Caceres 2021-2-2

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/733448-imaqhwinfo-webcam-not-detected

编辑： Sebastian Caceres 2021-2-2

Hello,

Working on on progam for hand gesture recognition. Up until now I have been using the stock webcam of my MacBook. I have recently bought a Logitech C920 webcam and would like to use it instead of the stock one. The code used for setting up video is below.

%% Create video input object.
cam = imaqhwinfo; % Get Camera information
cameraName = char(cam.InstalledAdaptors(end));
cameraInfo = imaqhwinfo(cameraName);
cameraId = cameraInfo.DeviceInfo.DeviceID(end);
cameraFormat = char(cameraInfo.DeviceInfo.SupportedFormats(end));
vidDevice = imaq.VideoDevice(cameraName, cameraId, cameraFormat, ... % Input Video from current adapter
                    'ReturnedColorSpace', 'RGB');
vidInfo = imaqhwinfo(vidDevice);  % Acquire video information

%I would think changing this:
cam = imaqhwinfo; 
%To this, would fix the issue
cam = imaqhwinfo('macvideo',2); 
%But, I recieve the following error.
%ERROR: There is no device with the specified DEVICEID.

I find this strange because I know that the computer is recognizing the c920 webcam as I can use it for Zoom. Any suggestions to be able to access c920 instead of the mac camera? Thanks!

*UPDATE: I have already installed the Image Acquisiton Toolbox support package for OS generic video interface

Best,

Sebastian Caceres