AVErrorMediaTypeKey The user information key to retrieve the media type. Declarationlet AVErrorMediaTypeKey: String See AlsoUser info keysAVErrorDeviceKeyAVErrorDiscontinuityFlagsKeyAVErrorFileSizeKeyAVErrorFileTypeKeyAVErrorMediaSubTypeKeyAVErrorPersistentTrackIDKeyAVErrorPIDKeyAVErrorPresentationTimeStampKeyAVErrorRecordingSuccessfullyFinishedKeyAVErrorTimeKey