Error when setting exposure time

Question

Happy PhD 2025-12-18，14:13

回答： Happy PhD about 21 hours 前

I use this to grab the camera I am using,

app.vidobj = imaq.VideoDevice('gentl', 1, 'Mono8');

Then I want to set the exposure time.

relase(app.vidobj); 
app.vidobj.DeviceProperties.ExposureTime = 14000;

But I am getting an error:

Unable to set the 'ExposureTime' property of class 'DeviceProperties' because it is read-only.

Any idea what is wrong?

I can change the gamma setting with the same code but with no error.

The camera is a FLIR USB3 camera if that makes any difference.

dpb 7 minutes 前

What is wrong is you're trying to set a read-only property.

If this is a frame grabber, you probably can only set a frame rate.

Answer 1

Happy PhD about 21 hours 前

The solution this was to use videoinput instead of imaq.VideoDevice. With src.getselectedsource one can set the parameters of the devic.