Camera exposure example

[sjkummer]

Description
Added an example for exposure control based on getusermedia/ptz.
Tested on Windows with Logitech Brio and C525 using official Logitech drivers.

Purpose

• The support for exposure controls differs between cameras, platforms and drivers. It's nice to have an easy way to test it.
• Keep @fippo busy 😉

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[fippo]

The more samples the merrier!

eslint should be able to fix most errors on its own

[sjkummer]

eslint should be able to fix most errors on its own

eslint should be fine now

[sjkummer]

Seems like the chromedriver version is outdated in package.json:
"chromedriver": "^98.0.1",

CI:
Current browser version is 100.0.4896.75 with binary path browsers/bin/chrome-stable

Should I change that, or would you prefer to fix that in a separate PR? @fippo

[fippo]

that, along with some flakyness is fixed in #1534

[fippo]

LGTM (now who gets to fix the reported bug.. :-))

[pgurusami]

@sjkummer
Tried running in macOs and it reports that the controls are not available.
But with the same webcam, I am able to adjust the settings in Windows system.
your inputs will be helpful

[fippo]

Maybe @beaufortfrancois knows the status of camera exposure on MacOS...

[beaufortfrancois]

UVC Controls on Chrome for macOS are currently disabled sadly: https://source.chromium.org/chromium/chromium/src/+/main:media/capture/video/mac/uvc_control_mac.mm;l=29;drc=2b892bc0f2a92c512d433f73a68bd1c41c82131b
I'm not aware of plans to re-enable them by default. @handellm may know more