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On my system I needed to use -d my guess is it was just a typo from you ?
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Lennie 2021-03-27 20:34:33 +01:00 committed by GitHub
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@ -99,8 +99,8 @@ v4l2 utilities provide the tools to manage USB webcam setting and information. S
* List of available video devices: `v4l2-ctl --list-devices`.
* List available control settings: `v4l2-ctl -d /dev/video0 --list-ctrls`.
* List available video formats: `v4l2-ctl -d /dev/video0 --list-formats-ext`.
* Read the current setting: `v4l2-ctl d /dev/video0 --get-ctrl=exposure_auto`.
* Change the setting value: `v4l2-ctl d /dev/video0 --set-ctrl=exposure_auto=1`.
* Read the current setting: `v4l2-ctl -d /dev/video0 --get-ctrl=exposure_auto`.
* Change the setting value: `v4l2-ctl -d /dev/video0 --set-ctrl=exposure_auto=1`.
[Here](https://www.kurokesu.com/main/2016/01/16/manual-usb-camera-settings-in-linux/) you can find more examples. Documentation is available in [`man v4l2-ctl`](https://www.mankier.com/1/v4l2-ctl).