presentationTimeStamp
The sample presentation timestamp that’s the earliest numerically in the sample buffer.
Declaration
var presentationTimeStamp: CMTime { get }Discussion
For in-presentation-order samples, the value represents the presentation timestamp of the first sample. For out-of-presentation-order samples, it represents the presentation timestamp of the sample the system presents first, which isn’t necessarily the first sample in the buffer.
This value is invalid if there’s an error.