Camera Exposure and imageProcessing Attributes have no effect

[aqmah]

Hi,
i am trying to use the Qt functionality for changing shutter speed iso etc. But whatever I use changing the Values (in qml) has no effect on the Picture coming from the camera.

For example I tried:

@
camera.stop()
camera.exposure.setManualShutterSpeed(1/itemExposuretime.value)
camera.start()@

and the effect on the camera is nothing (except the camera is restarting for the time of a blink)
If I change the same with bridged Objective C code (referring from qml to a Objective C C++ Hybrid Class using undocumented iOS APIs) it changes the ShutterSpeed as requested.

Is this a bug or did I miss something ?

Thanks,

[SGaist]

Hi,

Which version of Qt and OS X are you using ?

[aqmah]

I am using Qt 5.3 and OS X 10.5.8, I already tried it under Qt 5.2.1 and with Windows 7/Mac OS X 10.5.8, Qt 5.2.1/5.3 and Android 4.0/4.2 (all combinations) all with the same result.

[SGaist]

Then it's likely between a bug and a missing feature. You should go on the "bug report system":http://bugreports.qt-project.org to see if it's something known. If not please open a new report providing a minimal compilable example that reproduce the behavior. In your case, you should also post your little native test app

[mvuori]

Most likely the camera simply does not support that through Qt. I have a Qt camera app for three different Nokia OSs and none of them support this.

You should check with QCameraExposure::supportedShutterSpeeds whether it is possible.

And of course: always tell what the device is. Someone might already know what it can do.

[SGaist]

If the libs used by the backend (and the hardware of course) provides a mean to do it then I would say it's a missing feature.