33         var self = this;

    33         var self = this;

    34         var duration = 0;

    34         var duration = 0;

    35         Object.keys(this.get('mediaArray')).forEach(function(key) {

    35         Object.keys(this.get('mediaArray')).forEach(function(key) {

    36             if (!duration && self.get('mediaArray')[key].extent_ms) {

    36             if (!duration && self.get('mediaArray')[key].extent_ms) {

    37                 duration = self.get('mediaArray')[key].extent_ms;

    37                 duration = self.get('mediaArray')[key].extent_ms;

    39         });

    39         });

    40         return duration / 1000;

    40         return duration / 1000;

    41     })

    41     })

    42 

    42 

    43 });

    43 });