Camera Exposure and imageProcessing Attributes have no effect
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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,
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Hi,
Which version of Qt and OS X are you using ?
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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.
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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
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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.
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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.
