pub unsafe static kVTCompressionPropertyKey_PixelAspectRatio: &'static CFStringAvailable on crate feature
VTCompressionProperties only.Expand description
Describes the pixel aspect ratio for encoded frames.
Some video encoders may enforce specific pixel aspect ratios; in those cases this property will be read-only (SetProperty will return kVTPropertyReadOnlyErr). The pixel aspect ratio will be set on the format description for output samples, and may affect source frame scaling. NULL is a valid value for this property, meaning square pixels (1:1).
See also Apple’s documentation