canPerformMultiplePassesOverSourceMediaData
A Boolean value that indicates whether the export session can perform multiple passes over the source media to achieve better results.
Declaration
var canPerformMultiplePassesOverSourceMediaData: Bool { get set }Discussion
When the value for this property is true, the export session can produce higher quality results at the expense of longer export times. Setting this property to true may also require the export session to write temporary data to disk during the export. To control the location of temporary data, use the property directoryForTemporaryFiles.
The default value is false. Not all export session configurations can benefit from performing multiple passes over the source media. In these cases, setting this property to true has no effect.
You can’t set this property after the export starts.