How to change camera recorder settings in iOS ?

[Fabien.Bourgeais]

Hello,

I want to record a video in slow motion at 120fps on an iPad Air 2. I am facing difficulties trying to configure my qMediaRecorder. I created a Camera which works fine. I created a recorder and, by default, it gives me a 1080p video at ~30fps. But when I want to change these settings, It does nothing.

Here is the settings part :

QVideoEncoderSettings settings = QVideoEncoderSettings();
    settings.setCodec("video/h264");
    settings.setQuality(QMultimedia::LowQuality);
    settings.setFrameRate(120.0);
    settings.setResolution(640, 480);
    recorder->setVideoSettings(settings);

I realize these settings were not applied, so I dig in the QtMultimedia sources for iOS and I find that the settings are hardcoded by default for the moment.

What could be the best possible solution for changing recorder settings on iOS ?

I thought about mixing Objective-C with C++ but it seems very complicated. Maybe sub-classing avfmediaassetwriter.mm for changing only the settings, if possible.

Have you another idea please?
Thanks, Fabien.

[edit: fixed coding tags SGaist]

[SGaist]

Hi and welcome to devnet,

The nicest thing to do would be as stated in the TODO: get the information from the video encore settings control and rebuilt the plugin.