diff --git a/Project/Project.xcworkspace/xcuserdata/changsanjiang.xcuserdatad/UserInterfaceState.xcuserstate b/Project/Project.xcworkspace/xcuserdata/changsanjiang.xcuserdatad/UserInterfaceState.xcuserstate
index 1147e8c..5302211 100644
Binary files a/Project/Project.xcworkspace/xcuserdata/changsanjiang.xcuserdatad/UserInterfaceState.xcuserstate and b/Project/Project.xcworkspace/xcuserdata/changsanjiang.xcuserdatad/UserInterfaceState.xcuserstate differ
diff --git a/SJBaseVideoPlayer.podspec b/SJBaseVideoPlayer.podspec
index a28c9eb..a702d00 100644
--- a/SJBaseVideoPlayer.podspec
+++ b/SJBaseVideoPlayer.podspec
@@ -1,6 +1,6 @@
 Pod::Spec.new do |s|
   s.name         = 'SJBaseVideoPlayer'
-  s.version      = '3.7.7'
+  s.version      = '3.7.7.1'
   s.summary      = 'video player.'
   s.description  = 'https://github.com/changsanjiang/SJBaseVideoPlayer/blob/master/README.md'
   s.homepage     = 'https://github.com/changsanjiang/SJBaseVideoPlayer'
diff --git a/SJBaseVideoPlayer/AVPlayer/Core/SJAVPlayerItemObservation.m b/SJBaseVideoPlayer/AVPlayer/Core/SJAVPlayerItemObservation.m
index cc2ab4a..12ae645 100644
--- a/SJBaseVideoPlayer/AVPlayer/Core/SJAVPlayerItemObservation.m
+++ b/SJBaseVideoPlayer/AVPlayer/Core/SJAVPlayerItemObservation.m
@@ -36,13 +36,13 @@ - (void)_registerObserver {
     [_playerItem addObserver:self forKeyPath:kLoadedTimeRanges options:options context:&kLoadedTimeRanges];
 
     __weak typeof(self) _self = self;
-    [NSNotificationCenter.defaultCenter addObserverForName:AVPlayerItemDidPlayToEndTimeNotification object:self queue:NSOperationQueue.mainQueue usingBlock:^(NSNotification * _Nonnull note) {
+    [NSNotificationCenter.defaultCenter addObserverForName:AVPlayerItemDidPlayToEndTimeNotification object:_playerItem queue:NSOperationQueue.mainQueue usingBlock:^(NSNotification * _Nonnull note) {
         __strong typeof(_self) self = _self;
         if ( self == nil ) return;
         [self playerItemDidPlayToEndTime:note];
     }];
     
-    [NSNotificationCenter.defaultCenter addObserverForName:AVPlayerItemNewAccessLogEntryNotification object:self queue:nil usingBlock:^(NSNotification * _Nonnull note) {
+    [NSNotificationCenter.defaultCenter addObserverForName:AVPlayerItemNewAccessLogEntryNotification object:_playerItem queue:nil usingBlock:^(NSNotification * _Nonnull note) {
         dispatch_async(dispatch_get_global_queue(0, 0), ^{
             __strong typeof(_self) self = _self;
             if ( self == nil ) return;