CMTime seconds output

Question

This may seem ridiculous, but how can I output the seconds of CMTime to the console in Objective-C? I simply need the value divided by the timescale and then somehow see it in the console.

rob mayoff · Accepted Answer · 2014-04-16T15:26:08.360

161

NSLog(@"seconds = %f", CMTimeGetSeconds(cmTime));

edited Apr 16 '14 at 15:26

answered Feb 18 '12 at 23:31

rob mayoff

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3

how about that case when CMTimeGetSeconds returns NaN? – BUDDAx2 Nov 27 '14 at 19:45
My guess is the input is one of the [`CMTime` constants](https://developer.apple.com/library/IOs/documentation/CoreMedia/Reference/CMTime/index.html#//apple_ref/doc/constant_group/Time_Constants) (probably not `kCMTimeZero`). Try using `CMTimeShow` to see what its fields are. – rob mayoff Nov 28 '14 at 05:30

score 15 · Answer 2 · answered Feb 18 '12 at 23:30

15

Simple:

        NSLog(@"%lld", time.value/time.timescale);

answered Feb 18 '12 at 23:30

0xDE4E15B

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score 6 · Answer 3 · answered Jul 21 '15 at 06:34

If you want to convert in hh:mm:ss format then you can use this

NSUInteger durationSeconds = (long)CMTimeGetSeconds(audioDuration);
NSUInteger hours = floor(dTotalSeconds / 3600);
NSUInteger minutes = floor(durationSeconds % 3600 / 60);
NSUInteger seconds = floor(durationSeconds % 3600 % 60);
NSString *time = [NSString stringWithFormat:@"%02ld:%02ld:%02ld", hours, minutes, seconds];
NSLog(@"Time|%@", time);

score 2 · Answer 4 · answered Aug 25 '19 at 19:58

All answers before this one do not handle NaN case:

Swift 5:

/// Convert CMTime to TimeInterval
///
/// - Parameter time: CMTime
/// - Returns: TimeInterval
func cmTimeToSeconds(_ time: CMTime) -> TimeInterval? {
    let seconds = CMTimeGetSeconds(time)
    if seconds.isNaN {
        return nil
    }
    return TimeInterval(seconds)
}

score 1 · Answer 5 · answered Jun 05 '18 at 19:50

If you just want to print a CMTime to the console for debugging purposes use CMTimeShow:

Objective-C

CMTime time = CMTimeMakeWithSeconds(2.0, 60000); 
CMTimeShow(time);

Swift

var time = CMTimeMakeWithSeconds(2.0, 60000)
CMTimeShow(time)

It will print the value, timescale and calculate the seconds:

{120000/6000 = 2.0}

score 0 · Answer 6 · answered Dec 03 '16 at 10:49

0

 CMTime currentTime = audioPlayer.currentItem.currentTime;
 float videoDurationSeconds = CMTimeGetSeconds(currentTime);

answered Dec 03 '16 at 10:49

amisha.beladiya

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CMTime seconds output

6 Answers6