A Boolean value that indicates whether the export session can perform multiple passes over the source media to achieve better results.
- iOS 8.0+
- macOS 10.10+
- tvOS 9.0+
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
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.
This property cannot be set after the export has started.