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Tweaking your webcam in RHEL 8

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Linux distros may only seem lacking support for complementary software that allows full control of the hardware.
But more often than not, you can find quite decent command-line software to control the hardware.

Webcams are no exclusions to this. You can use excellent v4l2-ctl to control your webcam.

Here’s how to do it with CentOS/RHEL 8:

sudo dnf -y install https://extras.getpagespeed.com/release-latest.rpm
sudo dnf install v4l-utils

List detailed information about video devices:

v4l2-ctl --all

Zoom:

v4l2-ctl --verbose --set-ctrl=zoom_absolute=10

Disable autofocus:

v4l2-ctl --verbose --set-ctrl=focus_auto=0

Set manual focus value:

v4l2-ctl --verbose --set-ctrl=focus_absolute=1

You can do far beyond that, depending on your specific webcam features. Just take note of parameters available in the -all command output,
and adjust as needed.

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