Trying to understand CMTime and CMTimeMake

Question

1) CMTimeMake(1,10) means duration of 1 second and timescale of 10, or 10 frames per second. This means 1s duration of video with 10 frames?

2)

CMTime lastTime=CMTimeMake(1,10);
CMTime frameTime=CMTimeMake(1, 10);
CMTime currentTime=CMTimeAdd(lastTime, frameTime)

= (2, 10) ?

2 seconds of video and with 10 frames per second of the currentTime?

user_4145420 · Answer

If you only want to know how to make an interval for 1 second (like me), this is your answer:

int seconds = 1;

CMTime interval = CMTimeMakeWithSeconds(seconds, NSEC_PER_SEC);