pub unsafe static AVVideoCleanApertureKey: Option<&'static NSString>AVVideoSettings only.Expand description
Defines the region within the video dimensions that will be displayed during playback
The value for this key is an NSDictionary containing AVVideoCleanAperture*Key keys. AVVideoCleanApertureWidthKey and AVVideoCleanApertureHeightKey define a clean rectangle which is centered on the video frame. To offset this rectangle from center, use AVVideoCleanApertureHorizontalOffsetKey and AVVideoCleanApertureVerticalOffsetKey. A positive value for AVVideoCleanApertureHorizontalOffsetKey moves the clean aperture region to the right, and a positive value for AVVideoCleanApertureVerticalOffsetKey moves the clean aperture region down.
If no clean aperture region is specified, the entire frame will be displayed during playback.
Note that prior to macOS 10.9 and iOS 7.0, this key could only be specified as part of the dictionary given for AVVideoCompressionPropertiesKey. As of macOS 10.9 and iOS 7.0, the top level of an AVVideoSettings dictionary is the preferred place to specify this key.
See also Apple’s documentation