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OSX WEBCAM SETTINGS HOW TO

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How to change logitech c920 webcam settings using c++ on osx?.

This was succesfully tested on osx 10.7, 10.8 and 10.9 Note that the Logitech Camera is the id listed by the ofQTKitVideoGrabber in this caseĪnd the cameraToUse at the top of the yaml file is set to 6(c920's yaml 0 based index). Logitech c920 definition: - name: Logitech Camera

in UVCCameraControl.m's setData and getData modify the wIndex to use the selector instead of the unitID ( controlRequest.wValue = (selector << 8) | interfaceNum ).

in UVCCameraControl.h set UVC_PROCESSING_UNIT to 3 ( #define UVC_PROCESSING_UNIT_ID 0x03 ).

Add ofxUVC and ofxYAML to the openframeworks addons folder.

By default you are not guaranteed to get the camera's "best" native resolution.įor documentation purposes, here are the steps currently needed to get ofxUVC control over the Logitech c920 camera: grabber.initGrabber(1280, 720) if you are trying to get a 16:9 aspect from the camera. Remember to change the SDK for BOTH your project AND the openFrameworksLib project.Īlso, to ensure the correct aspect ratio, make sure you are initializing your camera with a specific size (e.g. Then restart XCode and choose the 10.6 or 10.7 SDK in the build settings. Then place both of those sdks in your XCode 5 SDKs folder at /Applications/Xcode.app/Contents/Developer/Platforms/atform/Developer/SDKs folder and to use them with XCode 5.

There are several ways to do this, but the easiest I've found is to use Pacifist.

You can extract the SDKs without installing the full package (which will be disallowed on 10.9). If you download an older version of XCode (the last version of 3 or 4 depending on if you want 10.6 or 10.7 SDKs) from the Apple developer site ( ), it will contain the 10.6 and/or 10.7 SDKs (inside the package).