diff --git a/examples/ios/Podfile.lock b/examples/ios/Podfile.lock
index 8398d69799..7046c3a212 100644
--- a/examples/ios/Podfile.lock
+++ b/examples/ios/Podfile.lock
@@ -9,8 +9,8 @@ EXTERNAL SOURCES:
     :path: "../../"
 
 SPEC CHECKSUMS:
-  IJKMediaPlayerKit: bd05a12295021503205584fb6e81b6c4c8814aa3
+  IJKMediaPlayerKit: 65b39f55bda0e03320d1fe72ac7824c99f230468
 
 PODFILE CHECKSUM: cd296d63e0523ffeac3abedb895edb14934a2d48
 
-COCOAPODS: 1.13.0
+COCOAPODS: 1.15.0
diff --git a/examples/macos/Podfile.lock b/examples/macos/Podfile.lock
index dd025ad947..61d953b5c4 100644
--- a/examples/macos/Podfile.lock
+++ b/examples/macos/Podfile.lock
@@ -9,8 +9,8 @@ EXTERNAL SOURCES:
     :path: "../../"
 
 SPEC CHECKSUMS:
-  IJKMediaPlayerKit: 85c0a3ed614353efb6d26f03f5ec2786443575eb
+  IJKMediaPlayerKit: 65b39f55bda0e03320d1fe72ac7824c99f230468
 
 PODFILE CHECKSUM: f950a6923955cd8172bbcde59a7c414fe1a4ac71
 
-COCOAPODS: 1.13.0
+COCOAPODS: 1.15.0
diff --git a/ijkmedia/ijksdl/metal/IJKMetalView.m b/ijkmedia/ijksdl/metal/IJKMetalView.m
index 2b44a22437..1e153f7514 100644
--- a/ijkmedia/ijksdl/metal/IJKMetalView.m
+++ b/ijkmedia/ijksdl/metal/IJKMetalView.m
@@ -580,7 +580,7 @@ - (float)computeSubtitleExtSacle
 - (void)refreshSubtitleExtSacle
 {
 #if TARGET_OS_IOS
-    self.backingScaleFactor = self.backingScaleFactor;
+    self.backingScaleFactor = self.window.contentScaleFactor;
 #else
     self.backingScaleFactor = self.window.backingScaleFactor;
 #endif