Converting CMTime to human readable time in objective-c - objective-c

Question

So I have a CMTime from a video. How do I convert it into a nice string like in the video time duration label in the Photo App. Is there some convenience methods that handle this? Thanks.
AVURLAsset* videoAsset = [AVURLAsset URLAssetWithURL:url options:nil];
CMTime videoDuration = videoAsset.duration;
float videoDurationSeconds = CMTimeGetSeconds(videoDuration);

Answer 1

You can use this as well to get a video duration in a text format if you dont require a date format
AVURLAsset *videoAVURLAsset = [AVURLAsset assetWithURL:url];
CMTime durationV = videoAVURLAsset.duration;
NSUInteger dTotalSeconds = CMTimeGetSeconds(durationV);
NSUInteger dHours = floor(dTotalSeconds / 3600);
NSUInteger dMinutes = floor(dTotalSeconds % 3600 / 60);
NSUInteger dSeconds = floor(dTotalSeconds % 3600 % 60);
NSString *videoDurationText = [NSString stringWithFormat:#"%i:%02i:%02i",dHours, dMinutes, dSeconds];

Answer 2

There is always an extension ;)
import CoreMedia
extension CMTime {
var durationText:String {
let totalSeconds = Int(CMTimeGetSeconds(self))
let hours:Int = Int(totalSeconds / 3600)
let minutes:Int = Int(totalSeconds % 3600 / 60)
let seconds:Int = Int((totalSeconds % 3600) % 60)
if hours > 0 {
return String(format: "%i:%02i:%02i", hours, minutes, seconds)
} else {
return String(format: "%02i:%02i", minutes, seconds)
}
}
}
to use
videoPlayer?.addPeriodicTimeObserverForInterval(CMTime(seconds: 1, preferredTimescale: 1), queue: dispatch_get_main_queue()) { time in
print(time.durationText)
}

Answer 3

You can use CMTimeCopyDescription, it work really well.
NSString *timeDesc = (NSString *)CMTimeCopyDescription(NULL, self.player.currentTime);
NSLog(#"Description of currentTime: %#", timeDesc);
edit: okay, i read the question too fast, this is not what your wanted but could be helpful anyway for debuging.
edit: as #bcattle commented, the implementation i suggested contain a memory leak with ARC. Here the corrected version :
NSString *timeDesc = (NSString *)CFBridgingRelease(CMTimeCopyDescription(NULL, self.player.currentTime));
NSLog(#"Description of currentTime: %#", timeDesc);

Answer 4

Based on combination of the question and comments above, this is concise:
AVURLAsset* videoAsset = [AVURLAsset URLAssetWithURL:url options:nil];
CMTime videoDuration = videoAsset.duration;
float videoDurationSeconds = CMTimeGetSeconds(videoDuration);
NSDate* date = [NSDate dateWithTimeIntervalSince1970:videoDurationSeconds];
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
[dateFormatter setTimeZone:[NSTimeZone timeZoneWithName:#"UTC"]];
[dateFormatter setDateFormat:#"HH:mm:ss"]; //you can vary the date string. Ex: "mm:ss"
NSString* result = [dateFormatter stringFromDate:date];

Answer 5

Swift 3.0 ios 10 answer based codingrhythm answer...
extension CMTime {
var durationText:String {
let totalSeconds = CMTimeGetSeconds(self)
let hours:Int = Int(totalSeconds / 3600)
let minutes:Int = Int(totalSeconds.truncatingRemainder(dividingBy: 3600) / 60)
let seconds:Int = Int(totalSeconds.truncatingRemainder(dividingBy: 60))
if hours > 0 {
return String(format: "%i:%02i:%02i", hours, minutes, seconds)
} else {
return String(format: "%02i:%02i", minutes, seconds)
}
}
}

Answer 6

Swift 4.2 extension
extension CMTime {
var timeString: String {
let sInt = Int(seconds)
let s: Int = sInt % 60
let m: Int = (sInt / 60) % 60
let h: Int = sInt / 3600
return String(format: "%02d:%02d:%02d", h, m, s)
}
var timeFromNowString: String {
let d = Date(timeIntervalSinceNow: seconds)
let dateFormatter = DateFormatter()
dateFormatter.dateFormat = "mm:ss"
return dateFormatter.string(from: d)
}
}

Answer 7

Simple extension I use for displaying video file duration.
import CoreMedia
extension CMTime {
var stringValue: String {
let totalSeconds = Int(self.seconds)
let hours = totalSeconds / 3600
let minutes = totalSeconds % 3600 / 60
let seconds = totalSeconds % 3600 % 60
if hours > 0 {
return String(format: "%i:%02i:%02i", hours, minutes, seconds)
} else {
return String(format: "%02i:%02i", minutes, seconds)
}
}
}

Answer 8

For example you can use NSDate and it's description method. You can specify any output format you want.
> `
// First, create NSDate object using
NSDate* d = [[NSDate alloc] initWithTimeIntervalSinceNow:seconds];
// Then specify output format
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init]; [dateFormatter setDateFormat:#"HH:mm:ss"];
// And get output with
NSString* result = [dateFormatter stringWithDate:d];`

Answer 9

here is the code for getting seconds from cmtime
NSLog(#"seconds = %f", CMTimeGetSeconds(cmTime));

Answer 10

Swift 3:
let time = kCMTimeZero
let timeString = time.toString()

Answer 11

A simplest way (without using NSDate and NSDateFormatter) to do this:-
Using Swift:-
func updateRecordingTimeLabel()
{
// Result Output = MM:SS(01:23)
let cmTime = videoFileOutput.recordedDuration
var durationInSeconds = Int(CMTimeGetSeconds(cmTime))
let durationInMinutes = Int(CMTimeGetSeconds(cmTime)/60)
var strDuMin = String(durationInMinutes)
durationInSeconds = durationInSeconds-(60*durationInMinutes)
var strDuSec = String(durationInSeconds)
if durationInSeconds < 10
{
strDuSec = "0"+strDuSec
}
if durationInMinutes < 10
{
strDuMin = "0"+strDuMin
}
// Output string
let str_output = strDuMin+":"+strDuSec
print("Result Output : [\(str_output)]")
}