AVErrorFileSizeKey The user information key to retrieve the file size in bytes. Declarationlet AVErrorFileSizeKey: String See AlsoUser info keysAVErrorDeviceKeyAVErrorDiscontinuityFlagsKeyAVErrorFileTypeKeyAVErrorMediaTypeKeyAVErrorMediaSubTypeKeyAVErrorPersistentTrackIDKeyAVErrorPIDKeyAVErrorPresentationTimeStampKeyAVErrorRecordingSuccessfullyFinishedKeyAVErrorTimeKey