[Interest] QCamera -> how to set resolution

[Alexander Carôt]

Thanks for this hint – in fact what you describe is my current workaround but I think it should be possible to consciously set the capture devic resolution via Qt. Interestingly the current default resolution of the mac M1 cam is a square of 1552 x 1552 pixels but I typically use 16:9 rations.

I will investigate this in more detail and will possibly report a bug or at least non-ideal implementation in order to improve it. Let's see.

Best

Alex


--
http://www.carot.de
Email : Alexander at Carot.de
Tel.: +49 (0)177 5719797


> Gesendet: Dienstag, 15. Oktober 2024 um 10:19 Uhr
> Von: "ekke" <ekke at ekkes-corner.org>
> An: interest at qt-project.org
> Betreff: Re: [Interest] QCamera -> how to set resolution
>
> I remember that I also had some problems setting the Camera resolution 
> on ios or android.
> So I always use the default resolution and later scale the captured QImage,
> but I only need the captured images to upload to a server, no video 
> processing, so this probably won't help you
> 
> ekke
> 
> 
> Am 14.10.24 um 23:51 schrieb Alexander Carôt via Interest:
> > Hello all,
> >
> > I have been using an Intel macOS with Sonoma 14.5 most of my time – here video processing with Qt6.8 works fine. I simply do frame-by-frame image capture and display the images in 16:9 format.
> >
> > However, on an Apple-Silicon-M1 Mac also with Sonoma 14.5 I have a problem with the resolution of the inbuilt cam which seems to not have a default 16:9 resolution – thus, the image is shrinked.
> >
> > So far I do (simplified):
> > =========================
> >
> > QSize resolution(1280, 720);
> > camera = new QCamera( QMediaDevices::defaultVideoInput() );
> > captureSession.setCamera(camera);
> > captureSession.setImageCapture(&imageCapture);
> > imageCapture.setResolution(resolution);
> > camera->start();
> >
> > And I additionally tied this after instantiating the camera object:
> > ===================================================================
> > QCameraFormat myCamFormat;
> > myCamFormat.resolution().setWidth(1280);
> > myCamFormat.resolution().setHeight(720);
> > camera->setCameraFormat(myCamFormat);
> >
> > However, it did not resolve the isse – can anyone advise how to do it ?
> >
> > Thanks beforehand,
> > best
> >
> > Alex
> >
> > --
> > http://www.carot.de
> > Email : Alexander at Carot.de
> > Tel.: +49 (0)177 5719797
> >
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