AVVideoCompositionRenderContextMBS.edgeWidths as AVEdgeWidthsMBS

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

The thickness of the edge processing region on the left, top, right and bottom edges, in pixels. (read-only)

Available in OS X v10.9 and later.
(Read only property)

AVVideoCompositionRenderContextMBS.Handle as Integer

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

The internal object reference.

(Read and Write property)

AVVideoCompositionRenderContextMBS.highQualityRendering as Boolean

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

The rendering quality to use. (read-only)

Specifies that the custom compositor should use higher quality, potentially slower algorithms.
Generally this property is true for non-real-time use cases.
Available in OS X v10.9 and later.
(Read only property)

AVVideoCompositionRenderContextMBS.pixelAspectRatio as AVPixelAspectRatioMBS

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

The pixel aspect ratio for rendered frames. (read-only)

Available in OS X v10.9 and later.
(Read only property)

AVVideoCompositionRenderContextMBS.renderScale as Double

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

A scaling ratio that is applied when rendering frames. (read-only)

Available in OS X v10.9 and later.
(Read only property)

AVVideoCompositionRenderContextMBS.renderTransform as CGAffineTransformMBS

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

Transform to apply to the source image (read-only)

The transform to apply to the source image incorporating the renderScale, pixelAspectRatio, and edgeWidths.
The coordinate system origin is the top left corner of the buffer.
Available in OS X v10.9 and later.
(Read only property)

AVVideoCompositionRenderContextMBS.size as CGSizeMBS

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

The width and height for rendering frames. (read-only)

Available in OS X v10.9 and later.
(Read only property)

AVVideoCompositionRenderContextMBS.videoComposition as AVVideoCompositionMBS

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

The video composition being rendered.

Available in OS X v10.9 and later.
(Read only property)