Use the following steps to manually adjust the image focus on your Logitech webcam: Launch Logitech Webcam Software: Start Programs Logitech Logitech Logitech Webcam Software. Click the Quick Capture button. Click the Controls button. Clear the Auto-focus option, and then move the slider to your preferred setting. Two problems: 1. OBS overrides the Logitech camera software, so you cannot use the Logitech camera software to manually adjust focus while recording in OBS. Using manual focus takes a fairly. Jul 21, 2021 An oldie but a goodie, Logitech's C920 has been the gold standard for webcams since it launched way back in 2013. Even after seven years, nothing has taken its place as the best webcam for video. Logitech® HD Pro Webcam C920. Webcam controls 5. Video effects and fun filters 6. Photo thumbnails. Choose between auto- or manual focus.
I'm trying to make two scenes, one with my Logitech C920 set to 35 and the other with it set to a manual focus of 140. I made sure each source was separate, but when I change the setting in one scene, it also changes it in the other. It seems that the webcam settings are global.
Is there any way to toggle the focus between two values without having to go into the webcam settings? I need to be able to do it on command when I am holding something up to the camera because the auto focus does not work fast enough (and I know the settings I want).
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There are many UVC compatible webcams most of them support full auto mode but only a few of these cameras provide extended manual white balance, gain and exposure control. Kurokesu C1 family (C1, C1 PRO, C1 MICRO), Logitech C920 and Brio are the ones that can be trusted.
There are few tools to work with USB cameras in Linux. Probably V4L2-CTL is the most advanced and recommended command line tool for advanced users.
Fresh Linux might be missing utility, install it with simple command:
Now let’s see what we have connected on USB port
Note two interfaces for Kurokesu C1 camera – this is dual stream output. One video device is for regular YUYV/MJPEG compressed output another is for h.264. You can open both of them at the same time with different programs (for example h.264 for live streaming, MJPG for onboard recording or computer vision processing)
List available controls
Video for Linux V4L2 can report all available controls to single list. List is self explanatory with possible value ranges.
Kurokesu C1 family
Logitech C920
Logitech Brio 4K
Reading current value
Read current UVC value with command below. Actual value is reported back below.
Setting new value
In order to set new camera parameter value use command syntax like this:
In some cases it is necessary to switch parameters in certain order for parameter to be set. For example change manual white balance control before setting fixed value:
Kurokesu C1 extension unit and firmware customization
Besides standard UVC control it is possible to customize Kurokesu C1 family camera firmware to meet specific customer needs, for example:
- Set default UVC control values
- Edit de-noise parameters
- Edit USB frame size
- Edit MJPEG compression rate
- Edit h.264 bitrate
- Set low light behavior (lower down to 2 frames per second automatically or maintain stable frame rate)
- and much more
Manual Focus Controls Logitech C920 On Mac
Camera Extension Unit is designed for Linux and allows to alter even more controls not covered by UVC protocol (for example: spot/center/frame measuring mode).