Retrieves the nominal refresh period of a display link.
- macOS 10.4+
- Core Video
The display link whose refresh period you want to obtain.
CVTime structure that holds the nominal refresh period. This value is indefinite if an invalid display link was specified.
This call allows one to retrieve the device's ideal refresh period. For example, an NTSC output device might report 1001/60000 to represent the exact NTSC vertical refresh rate.