How do I get current playing time, CMTime in milliseconds in AVPlayer? - ios

Question

I am getting current playing value in seconds but i need in milliseconds. I tried to currentTime.value/currentTime.scale. But it didn't get exact value.
CMTime currentTime = vPlayer.currentItem.currentTime; //playing time
CMTimeValue tValue=currentTime.value;
CMTimeScale tScale=currentTime.timescale;
NSTimeInterval time = CMTimeGetSeconds(currentTime);
NSLog(#"Time :%f",time);//This is in seconds, it misses decimal value double shot=(float)tValue/(float)tScale;
shotTimeVideo=[NSString stringWithFormat:#"%.2f",(float)tValue/(float)tScale];
CMTime currentTime = vPlayer.currentItem.currentTime; //playing time
CMTimeValue tValue=currentTime.value;
CMTimeScale tScale=currentTime.timescale;
NSTimeInterval time = CMTimeGetSeconds(currentTime);
NSLog(#"Time :%f",time);//This is in seconds, it misses decimal value
double shot=(float)tValue/(float)tScale;
shotTimeVideo=[NSString stringWithFormat:#"%.2f", (float)tValue/(float)tScale];

Answer 1

okay,first of all, the value you want is millisecond not seconds
So,you can just use CMTimeGetSeconds(<#CMTime time#>) to get Secondsthen,if you want millisecond , use seconds / 1000.f for float or double value
for CMTime calculating use CMTime method CMTimeMultiplyByRatio(<#CMTime time#>, <#int32_t multiplier#>, <#int32_t divisor#>)just do this --> CMTimeMultiplyByRatio(yourCMTimeValue, 1, 1000)
Apple's Doc
#function CMTimeMultiplyByRatio
#abstract Returns the result of multiplying a CMTime by an integer, then dividing by another integer.
#discussion The exact rational value will be preserved, if possible without overflow. If an overflow
would occur, a new timescale will be chosen so as to minimize the rounding error.
Default rounding will be applied when converting the result to this timescale. If the
result value still overflows when timescale == 1, then the result will be either positive
or negative infinity, depending on the direction of the overflow.
If any rounding occurs for any reason, the result's kCMTimeFlags_HasBeenRounded flag will be
set. This flag will also be set if the CMTime operand has kCMTimeFlags_HasBeenRounded set.
If the denominator, and either the time or the numerator, are zero, the result will be
kCMTimeInvalid. If only the denominator is zero, the result will be either kCMTimePositiveInfinity
or kCMTimeNegativeInfinity, depending on the signs of the other arguments.
If time is invalid, the result will be invalid. If time is infinite, the result will be
similarly infinite. If time is indefinite, the result will be indefinite.
#result (time * multiplier) / divisor

Answer 2

A little late, but may be useful for others.
You can get the timestamp in milliseconds from the CMTime object by
CMTimeConvertScale(yourCMTime, timescale:1000, method:
CMTimeRoundingMethod.roundHalfAwayFromZero
An example:
var yourtime:CMTime = CMTimeMake(value:1234567, timescale: 10)
var timemilli:CMTime = CMTimeConvertScale(yourtime, timescale:1000, method:
CMTimeRoundingMethod.roundHalfAwayFromZero)
var timemillival:Int64 = timemilli.value
print("timemilli \(timemillival)")
which will produce
timemilli 123456700