Using seconds in AVPlayer seekToTime

Question

this should be a simple one. I have an AVPlayer playing a video file and I want to be able to jump to a specific time but I'm having some trouble understanding how CMTime works.

I need to specify the time in seconds. For example: if I wanted to jump to second 10.8 I'd like to do something like this:

[self.avPlayer.currentItem seekToTime:CMTimeMakeWithSeconds(10.8, 1];

But I'm not getting the result I want.

score 25 · Answer 1 · edited Feb 28 '16 at 03:43

25

http://warrenmoore.net/understanding-cmtime

Might give you a clearer idea of CMTime.

If you changed your line to read...

[self.avPlayer.currentItem seekToTime:CMTimeMakeWithSeconds(10.8, 60000)];

You might get better results. The 60000 is how many items make up a single second. If you use 1 for this value then you can only jump to a single place per second - by putting 60000 you are giving yourself 60000 places between second 10 and second 11.

edited Feb 28 '16 at 03:43

saturngod

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answered Mar 27 '14 at 20:59

amergin

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Thank You! I finally understand NSTime concept – Ofir Malachi Nov 27 '17 at 10:03
can see this : https://stackoverflow.com/questions/50803475/play-a-video-in-avplayer-for-a-specific-duration-in-swift3-ios – user2786 Jun 11 '18 at 18:05

score 13 · Answer 2 · answered Mar 04 '19 at 00:44

13

In case you need to seek to a very specific time I would recommend using this method with tolerance:

let myTime = CMTime(seconds: 10.8, preferredTimescale: 60000)    
player.seek(to: myTime, toleranceBefore: .zero, toleranceAfter: .zero)

Documentation: link. Apple suggests using it for high accuracy.

answered Mar 04 '19 at 00:44

Tung Fam

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after several solutions on this post, I ended needing to use the toleranceBefore and toleranceAfter parameters for the seek to work properly. – Nick N Mar 04 '21 at 03:50
there's no ".zero" in CMTime – Fattie Apr 01 '23 at 23:57

score 3 · Answer 3 · edited Mar 17 '20 at 16:09

3

Swift version

avPlayer.seek(to:CMTimeMakeWithSeconds(10.8,1000))

edited Mar 17 '20 at 16:09

Brian Sachetta

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answered Jun 20 '17 at 16:36

Radu Diță

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Swift 5.1 version – Asad Jamil Jan 21 '20 at 10:24

score 1 · Answer 4 · answered Jan 21 '20 at 10:27

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Swift 5.1 version

player?.seek(to: CMTime(value: CMTimeValue(10.8), timescale: 1000))

answered Jan 21 '20 at 10:27

Asad Jamil

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Using seconds in AVPlayer seekToTime

4 Answers4

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