Instance Property

timeRange

The time range exported from the source.

Declaration

@property(nonatomic) CMTimeRange timeRange;

Discussion

The default time range of an export session is kCMTimeZero to kCMTimePositiveInfinity, meaning that (modulo a possible limit on file length) the full duration of the asset will be exported.

You can observe this property using Key-value observing.

See Also

Configuring Output

outputURL

The URL of the export session’s output.

supportedFileTypes

An array containing the types of files the session can write.

outputFileType

The type of file written by the session.

fileLengthLimit

The file length that the output of the session should not exceed.

metadata

The metadata written to the output file by the export session.

metadataItemFilter

Specifies a filter object used during export to determine which metadata items to transfer from the source asset.

audioMix

The parameters for audio mixing and an indication whether to enable nondefault audio mixing for export.

audioTimePitchAlgorithm

A processing algorithm used to manage audio pitch for scaled audio edits.

shouldOptimizeForNetworkUse

A Boolean value that indicates whether to optimize the movie should for network use.

videoComposition

The instructions for video composition, and indicates whether video composition is enabled for export.

customVideoCompositor

The custom video compositor instance used, if any.

canPerformMultiplePassesOverSourceMediaData

A Boolean value that indicates whether the export session can perform multiple passes over the source media to achieve better results.

directoryForTemporaryFiles

A directory that is suitable for containing temporary files generated during the export process.