fix: #539

Signed-off-by: bggRGjQaUbCoE <githubaccount56556@proton.me>

lib/plugin/pl_player/controller.dart

@@ -1034,7 +1034,7 @@ class PlPlayerController {
   Future<void> setPlaybackSpeed(double speed) async {
     lastPlaybackSpeed = playbackSpeed;
 
-    if (speed == playbackSpeed) {
+    if (speed == _videoPlayerController?.state.rate) {
       return;
     }
 

lib/plugin/pl_player/view.dart

@@ -596,7 +596,8 @@ class _PLVideoPlayerState extends State<PLVideoPlayer>
       ),
 
       /// 播放速度
-      BottomControlType.speed: Container(
+      BottomControlType.speed: Obx(
+        () => Container(
           height: 30,
           margin: const EdgeInsets.symmetric(horizontal: 10),
           alignment: Alignment.center,
@@ -625,6 +626,7 @@ class _PLVideoPlayerState extends State<PLVideoPlayer>
                 semanticsLabel: "${plPlayerController.playbackSpeed}倍速"),
           ),
         ),
+      ),
 
       /// 全屏
       BottomControlType.fullscreen: SizedBox(