如何设置iOS摄像头的帧率

Question

我是iOS编码的新手，现在我想设置iOS前置摄像头的帧，如18 fps或25 fps。这是我的代码，我很困惑，无论我如何更改activeVideoMinFrameDuration和activeVideoMaxFrameDuration的值，最终视频总是30fps。

app/components/reject-dialog.js
export default Ember.Component.extend({
    changeObserver: Ember.observer('rejectFormData.application_id', function(){
  //do logic
}),
    change() {
        // this fires only when changed through this component
        // I want this to fire even when changed from other components
        alert('changed!');
    },
    actions: {
        rejectApplication(formData) {
            this.set('formData.application_id', 123);
        }
    }
});

Answer 1

您可能还需要设置

videoFileOutput.movieFragmentInterval = CMTime(seconds: 1, preferredTimescale: 25)