Problem running the QCamera
I'm trying to set up a simple VideoGrabber. But the VideoGrabber does not work.
The VideoGrabber will be found, so if I print the device description it gives me the information.
The code which does this is actually very small:
QCamera * camera = new QCamera(); QCameraViewfinder * viewfinder = new QCameraViewfinder(); viewfinder->show(); camera->setViewfinder(viewfinder); camera->start();
It returns with the following error message:
failed to renderstream -2147024809
failed to openStream()
Stream did not open
As VideoGrabber (the one which makes problems) I have one from Digitus.
On the other hand I have a working VideoGrabber, which is from EasyCAP. But this VideoGrabber I can just use for testing. I need the one from Digitus running, so I don't have the possiblity to change the VideoGrabber.
Any suggestions what I can do?
I also looked up, how I could change which input device it is using, but I didn't found sth. to this. So I think it uses the S-Video input instead of the CVBS signal. Any suggestions how I could change this?
I'm running the Qt Version 5.1 on a Windows 7.
Hi and welcome to devnet,
Might be a silly question but did you check whether your Digitus grabber works properly outside of Qt ? Is it supported by Windows WMF ? DirectX ?
Thx for your quick response.
Yes it is working outside of Qt. For example it runs in the vlc Player. But there is also the problem that I have to set the device to CVBS and do not use the default S-Video input. I'm not sure how I could change this by Qt?
What devices does QCameraInfo::availableCameras() return ?
So I don't have QCameraInfo cause I use Qt 5.1.
But QCamera::availableDevices() gives me the same information, I think.
It returns the following:
As the device description it returns:
USB 2821 Device