sourceVideoAverageFrameDuration
A time value that describes the average frame duration of the video data.
Declaration
var sourceVideoAverageFrameDuration: CMTime { get set }Discussion
Setting this property enables the output settings assistant to generate more complete video settings. After setting a value, requery the videoSettings property to get the latest values.
The default value is 1/30, which means the output settings assistant assumes that your source video has a frame rate of 30fps.