Indicates that the original buffer chroma subsampled data was used 420 formatting. In 420 formatting, each pixel has a y value, while u and v values are shared amongst a square of 4 pixels.
Available in Mac OS X v10.5 and later.
Declaration Syntax Version Information- Available in Monobjc Bridge: 10.6 (For Mac OS X 10.6 and later), 10.5 (For Mac OS X 10.5 and later)