Arducam 8MP USB module YUYV 10fps?

USB UVC Webcams
1

Hi,

I’m using the “Arducam 8MP 1080P USB Camera Module, 1/4” CMOS IMX219 Mini UVC USB2.0 Webcam Board”. When reading the formats supported I only see up to 10fps for YUYV while the documentation says it can goes to up to 30fps.
When accessing the camera I only got 10fps indeed and I’ve tried changing the fps via v4l2-ctl or opencv without success.

Is there something I’m missing? Thanks for your help.

(Sorry for the formatting but the forum does not let me upload images.)

v4l2-ctl --list-formats-ext -d 0 ioctl: VIDIOC_ENUM_FMT Type: Video Capture 
[0]: 'YUYV' (YUYV 4:2:2)
	Size: Discrete 3264x2448
		Interval: Discrete 0.500s (2.000 fps)
	Size: Discrete 2592x1944
		Interval: Discrete 0.200s (5.000 fps)
	Size: Discrete 2048x1536
		Interval: Discrete 0.200s (5.000 fps)
	Size: Discrete 1920x1080
		Interval: Discrete 0.111s (9.000 fps)
	Size: Discrete 1600x1200
		Interval: Discrete 0.100s (10.000 fps)
	Size: Discrete 1280x960
		Interval: Discrete 0.100s (10.000 fps)
	Size: Discrete 1280x800
		Interval: Discrete 0.100s (10.000 fps)
	Size: Discrete 1280x720
		Interval: Discrete 0.100s (10.000 fps)
	Size: Discrete 800x600
		Interval: Discrete 0.100s (10.000 fps)
	Size: Discrete 640x480
		Interval: Discrete 0.100s (10.000 fps)
[1]: 'MJPG' (Motion-JPEG, compressed)
	Size: Discrete 3264x2448
		Interval: Discrete 0.067s (15.000 fps)
	Size: Discrete 2592x1944
		Interval: Discrete 0.067s (15.000 fps)
	Size: Discrete 2048x1536
		Interval: Discrete 0.067s (15.000 fps)
	Size: Discrete 1920x1080
		Interval: Discrete 0.033s (30.000 fps)
	Size: Discrete 1600x1200
		Interval: Discrete 0.033s (30.000 fps)
	Size: Discrete 1280x800
		Interval: Discrete 0.033s (30.000 fps)
	Size: Discrete 1280x720
		Interval: Discrete 0.033s (30.000 fps)
	Size: Discrete 800x600
		Interval: Discrete 0.033s (30.000 fps)
	Size: Discrete 640x480
		Interval: Discrete 0.033s (30.000 fps)
2

Hi,

Sorry for our document mislead you. the actual frame rate is subject to the V4l2 report.

3

Ok :frowning:
When using MJPG I can reach 17fps.
Is there any way to get higher frame rate?

4

Hi,

It seems to be related to ambient light. If the environment is dark, the camera will increase the exposure time, thereby reducing the frame rate, Can you try to increase the brightness of the environment? I will check it and try to optimize the the frame rate. If I can increase it and I will tell you.

 

5

Yes, indeed it seems to be related with the brightness of the image.

6

Yes, IN auto exposure mode, it will adjust exposure time according to light.