ignore waterline when vod duration is less than waterline

dist/videojs-contrib-hls.js

@@ -910,8 +910,13 @@ var MasterPlaylistController = (function (_videojs$EventTarget) {
         // we want to switch down to lower resolutions quickly to continue playback, but
         // ensure we have some buffer before we switch up to prevent us running out of
         // buffer while loading a higher rendition
-        // If the playlist is live, then we want to not take low water line into account
-        if (!currentPlaylist.endList || nextPlaylist.attributes.BANDWIDTH < currentPlaylist.attributes.BANDWIDTH || forwardBuffer >= _config2['default'].BUFFER_LOW_WATER_LINE) {
+        // If the playlist is live, then we want to not take low water line into account.
+        // This is because in LIVE, the player plays 3 segments from the end of the
+        // playlist, and if `BUFFER_LOW_WATER_LINE` is greater than the duration availble
+        // in those segments, a viewer will never experience a rendition upswitch.
+        // For the same reason as LIVE, we ignore the low waterline when the VOD duration
+        // is below the waterline
+        if (!currentPlaylist.endList || _this3.duration() < _config2['default'].BUFFER_LOW_WATER_LINE || nextPlaylist.attributes.BANDWIDTH < currentPlaylist.attributes.BANDWIDTH || forwardBuffer >= _config2['default'].BUFFER_LOW_WATER_LINE) {
           _this3.masterPlaylistLoader_.media(nextPlaylist);
         }
 

src/master-playlist-controller.js

@@ -558,8 +558,14 @@ export class MasterPlaylistController extends videojs.EventTarget {
       // we want to switch down to lower resolutions quickly to continue playback, but
       // ensure we have some buffer before we switch up to prevent us running out of
       // buffer while loading a higher rendition
-      // If the playlist is live, then we want to not take low water line into account
+      // If the playlist is live, then we want to not take low water line into account.
+      // This is because in LIVE, the player plays 3 segments from the end of the
+      // playlist, and if `BUFFER_LOW_WATER_LINE` is greater than the duration availble
+      // in those segments, a viewer will never experience a rendition upswitch.
+      // For the same reason as LIVE, we ignore the low waterline when the VOD duration
+      // is below the waterline
       if (!currentPlaylist.endList ||
+          this.duration() < Config.BUFFER_LOW_WATER_LINE ||
           nextPlaylist.attributes.BANDWIDTH < currentPlaylist.attributes.BANDWIDTH ||
           forwardBuffer >= Config.BUFFER_LOW_WATER_LINE) {
         this.masterPlaylistLoader_.media(nextPlaylist);