Control your webcam with v4l
Following this tweet, I found out this option is actually not supported by my different webcam options, but the v4l-utils
suite (stands for Video for Linux) seems actually precious.
Install with:
sudo apt install v4l-utils
List your webcam with:
v4l2-ctl --list-devices
Device 0 is usually the embedded webcam.
You may list control options with:
v4l2-ctl -d 0 -L
Then set options with:
v4l2-ctl --set-ctrl=exposure_auto=1
v4l2-ctl -c exposure_auto=1
Options must be set at every reboot.