requiredParameterMissing You didn’t provide a valid value for a required parameter. Declarationstatic let requiredParameterMissing: NSError See AlsoErrorsallocationFailedalreadyHasDataBufferarrayTooSmallbufferHasNoSampleSizesbufferHasNoSampleTimingInfobufferNotReadycannotSubdividedataCanceleddataFailedinvalidEntryCountinvalidMediaFormatinvalidMediaTypeForOperationinvalidSampleDatainvalidatedsampleIndexOutOfRange