AVPlayerItemLegibleOutputMBS.Constructor

Type	Topic	Plugin	Version	macOS	Windows	Linux	iOS	Targets
method	AVFoundation	MBS AVFoundation Plugin	14.0	✅ Yes	❌ No	❌ No	✅ Yes	All

The standard constructor.

See also:

• Constructor(subTypes() as string)

AVPlayerItemLegibleOutputMBS.Constructor(subTypes() as string)

Type	Topic	Plugin	Version	macOS	Windows	Linux	iOS	Targets
method	AVFoundation	MBS AVFoundation Plugin	14.0	✅ Yes	❌ No	❌ No	✅ Yes	All

The constructor.

Returns an instance of AVPlayerItemLegibleOutput with filtering enabled for AVPlayerItemLegibleOutputPushDelegate's legibleOutput:didOutputAttributedStrings:nativeSampleBuffers:forItemTime:.

subtypes: Array of strings with 4 letter codes.

Add media subtype FourCC number objects to the subtypes array to elect to receive that type as a CMSampleBuffer instead of an NSAttributedString. Initializing an AVPlayerItemLegibleOutput using the Constructor method is equivalent to calling Constructor with an empty array, which means that all legible data, regardless of media subtype, will be delivered using NSAttributedString in a common format.

If a media subtype for which there is no legible data in the current player item is included in the media subtypes array, no error will occur. AVPlayerItemLegibleOutput will not vend closed caption data as CMSampleBuffers, so it is an error to include 'c608' in the media subtypes array.

See also:

• Constructor