How to trim the video file and convert to 15 seconds video with iOS SDK?

Question

I want to trim a video file. I want to just pick the video from a gallery and convert it to a 15-second video. If I use normal trimming with picker view controller, it does

Answer 1

The above answer worked for me with a little change in case we need to set both start time and end time to trim.

I changed this:

CMTime start = CMTimeMakeWithSeconds(1.0, 600); // you will modify time range here
CMTime duration = CMTimeMakeWithSeconds(15.0, 600);
CMTimeRange range = CMTimeRangeMake(start, duration);

To this:

CMTime start = CMTimeMakeWithSeconds(self.StartTime, 600); // you will modify time range here
    CMTime duration = CMTimeSubtract(CMTimeMakeWithSeconds(self.EndTime, 600), start);
    CMTimeRange range = CMTimeRangeMake(start, duration);

It worked for me.