Unsolved How to get USB camera to be default
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Hello, I am working on an embedded board and inside the board it has a /dev/video0 and a /dev/video1 by default. I then plug in my USB camera and it usually is /dev/video2. My current code is taking the deafult camera and (which I want to be the USB camera) thinking it is the /dev/video0.
My code:
int find_device(){ QString device_name; std::string defaultDevice; const QList<QCameraInfo> availableCameras = QCameraInfo::availableCameras(); for (const QCameraInfo &cameraInfo : availableCameras) { if (cameraInfo == QCameraInfo::defaultCamera()){ device_name = QCameraInfo::defaultCamera().deviceName(); defaultDevice = device_name.toStdString(); } }
Does anyone know how I would edit this to make the USB camera the one it defaults to or how it could find it? I dont think QCamerainfo::devicename will work for me because there are multiple USB cameras I plug in that have different names.
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Hi,
That is something that you have to setup on your system. If using udev for example, write a rule that gives a meaningful name to that camera and use that in your software.