update duration on UI

@@ -284,7 +284,8 @@
 
     // the manifest is empty until the parse stream begins delivering data
     this.manifest = {
-      allowCache: true
+      allowCache: true,
+      totalDuration: 0
     };
 
     // update the manifest with the m3u8 entry from the parse stream

@@ -28,6 +28,7 @@ var
 
       segmentXhr,
       fillBuffer,
+      onLoadedManifest,
       selectPlaylist;
 
     extname = (/[^#?]*(?:\/[^#?]*\.([^#?]*))/).exec(player.currentSrc());
@@ -66,6 +67,20 @@ var
         player.hls.currentMediaIndex = 0;
       };
 
+      onLoadedManifest = function() {
+        if(player.hls.manifest.totalDuration === 0) {
+          for(var i in player.hls.manifest.segments) {
+            var currentSegment = player.hls.manifest.segments[i];
+            currentSegment.timeRange = {};
+            currentSegment.timeRange.start = player.hls.manifest.totalDuration;
+            currentSegment.timeRange.end = currentSegment.timeRange.start + currentSegment.duration;
+            player.hls.manifest.totalDuration += currentSegment.duration;
+          }
+        }
+
+        player.duration(player.hls.manifest.totalDuration);
+      };
+
       /**
        * Determines whether there is enough video data currently in the buffer
        * and downloads a new segment if the buffered time is less than the goal.
@@ -144,6 +159,7 @@ var
       };
       player.on('loadedmetadata', fillBuffer);
       player.on('timeupdate', fillBuffer);
+      player.on('loadedmanifest', onLoadedManifest);
 
       // download and process the manifest
       (function() {