UiVideoEditorController改变大小

Question

我正在捕捉视频使用AVCaptureSession

然后使用UIVideoEditorController

编辑视频

UIVideoEditorController *videoEditor = [[UIVideoEditorController alloc] init];
videoEditor.videoPath = recordedFile.path;
videoEditor.videoQuality = UIImagePickerControllerQualityTypeIFrame960x540;
videoEditor.delegate = self;

然而，输出视频大小始终返回为640 * 360

有谁知道为什么？