pub unsafe static AVCaptureSessionPresetInputPriority: &'static AVCaptureSessionPresetAVCaptureSessionPreset only.Expand description
An AVCaptureSession preset indicating that the formats of the session’s inputs are being given priority.
By calling -setSessionPreset:, clients can easily configure an AVCaptureSession to produce a desired quality of service level. The session configures its inputs and outputs optimally to produce the QoS level indicated. Clients who need to ensure a particular input format is chosen can use AVCaptureDevice’s -setActiveFormat: method. When a client sets the active format on a device, the associated session’s -sessionPreset property automatically changes to AVCaptureSessionPresetInputPriority. This change indicates that the input format selected by the client now dictates the quality of service level provided at the outputs. When a client sets the session preset to anything other than AVCaptureSessionPresetInputPriority, the session resumes responsibility for configuring inputs and outputs, and is free to change its inputs’ activeFormat as needed.
See also Apple’s documentation