Why I can find only one available resolution for my webcam?

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Wenye Ouyang
Wenye Ouyang 2020-10-29
评论： Wenye Ouyang 2020-11-6
Hi there,
To briefly explain my problem, I was using webcam to acquire images on Windows and everything worked fine (MATLAB can find all available resolutions of my webcam). Then I used exactly the same code on my Ubuntu machine and expected the same outputs but it turns out this time MATLAB can only detect one available resolution. I tried with my inbuilt camera and it was the same - only one resolution is available. Can anyone suggest any solutions to this problem? Cheers!
Error message:
Error using webcam/set.Resolution (line 163)
Expected Resolution to match one of these values:
'1920x1080'
The input, '640x480', did not match any of the valid values.
Error in camSimple (line 6)
cam.Resolution = '640x480';
Actual available resolutions of my webcam:
[video4linux2,v4l2 @ 0x5623c76c28c0] Compressed: mjpeg : Motion-JPEG : 1920x1080 1280x960 1280x720 800x600 640x480 640x360
[video4linux2,v4l2 @ 0x5623c76c28c0] Raw : yuyv422 : YUYV 4:2:2 : 1920x1080 1280x960 1280x720 800x600 640x480 640x360
[video4linux2,v4l2 @ 0x5623c76c28c0] Compressed: h264 : H.264 : 1920x1080 1280x960 1280x720 800x600 640x480 640x360

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采纳的回答

Saurav Chaudhary
Saurav Chaudhary 2020-11-6
Webcam Support package supports only the default Webcam resolution on Linux as of now. Go through the link given below to find more information about same.
https://in.mathworks.com/help/supportpkg/usbwebcams/ug/set-properties-for-webcam-acquisition.html#:~:text=You%20can%20set%20device%2Dspecific%20properties%20only%20for%20webcams%20connected,set%20as%20the%20second%20argument

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