试图了解CMTime和CMTimeMake [英] Trying to understand CMTime and CMTimeMake
本文介绍了试图了解CMTime和CMTimeMake的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
1) CMTimeMake(1,10)
表示持续时间为1秒,时间刻度为10或每秒10帧。这意味着1帧视频的持续时间为10帧?
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秒的视频和每秒10帧的当前时间?
2 seconds of video and with 10 frames per second of the currentTime?
推荐答案
1) CMTimeMake(1,10)
实际上意味着值为1,时间刻度为10.它们是分子和分母,因此是1/10一秒,而不是1秒。
1) CMTimeMake(1,10)
actually means a value of 1 and a timescale of 10. They are a numerator and denominator, so it is 1/10 of a second, not 1 second.
2)结果将类似于 CMTimeMake(2,10)
,其中是2/10秒。
2) The result will be like CMTimeMake(2, 10)
, which is 2/10ths of a second.
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