AVErrorDeviceKey The user information key to retrieve the device name. Declarationlet AVErrorDeviceKey: String See AlsoUser info keysAVErrorDiscontinuityFlagsKeyAVErrorFileSizeKeyAVErrorFileTypeKeyAVErrorMediaTypeKeyAVErrorMediaSubTypeKeyAVErrorPersistentTrackIDKeyAVErrorPIDKeyAVErrorPresentationTimeStampKeyAVErrorRecordingSuccessfullyFinishedKeyAVErrorTimeKey