CMTime is specially used to represent movie time. CMTime(a,b) a represents the current frame, b represents the frame rate, how many frames per second. CMTime(60,30) This represents a video with 30 frames per second, and 60 frames are played, which is at 2 seconds. CMTime(30,15) This represents a video with 15 frames per second. After playing 30 frames, it is still at 2 seconds.
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CMTime is specially used to represent movie time.
CMTime(a,b) a represents the current frame, b represents the frame rate, how many frames per second.
CMTime(60,30) This represents a video with 30 frames per second, and 60 frames are played, which is at 2 seconds.
CMTime(30,15) This represents a video with 15 frames per second. After playing 30 frames, it is still at 2 seconds.