sourceImage
The current video frame image.
Declaration
var sourceImage: CIImage { get }Discussion
To apply a Core Image filter to this image, assign it to the inputImage parameter of a CIFilter object, or use a CIImage convenience method such as the applyingFilter(_:parameters:) method.
The pixel format for this image is the BGRA8 format (of the kCVPixelFormatType_32BGRA type). Unlike when processing video with the AVAsynchronousVideoCompositionRequest class, the renderContext object’s renderTransform property is already applied to this image.