diff --git a/lib/models/video/play/subtitle.dart b/lib/models/video/play/subtitle.dart
index 0c92b5443..d69352e1c 100644
--- a/lib/models/video/play/subtitle.dart
+++ b/lib/models/video/play/subtitle.dart
@@ -3,8 +3,8 @@ enum SubtitlePreference { off, on, withoutAi }
 extension SubtitlePreferenceDesc on SubtitlePreference {
   static final List<String> _descList = [
     '默认不显示字幕',
-    '选择第一个可用字幕',
-    '跳过自动生成(ai)字幕，选择第一个可用字幕'
+    '默认显示，优先选择非自动生成(ai)字幕',
+    '默认仅显示非自动生成(ai)字幕',
   ];
   get description => _descList[index];
 }
diff --git a/lib/pages/setting/pages/play_speed_set.dart b/lib/pages/setting/pages/play_speed_set.dart
index 5a0025e68..c1e95650a 100644
--- a/lib/pages/setting/pages/play_speed_set.dart
+++ b/lib/pages/setting/pages/play_speed_set.dart
@@ -21,6 +21,7 @@ class _PlaySpeedPageState extends State<PlaySpeedPage> {
   late double longPressSpeedDefault;
   late List<double> customSpeedsList;
   late bool enableAutoLongPressSpeed;
+  late bool enableLongPressSpeedIncrease;
   List<Map<dynamic, dynamic>> sheetMenu = [
     {
       'id': 1,
@@ -75,6 +76,8 @@ class _PlaySpeedPageState extends State<PlaySpeedPage> {
         sheetMenu[1] = newItem;
       });
     }
+    enableLongPressSpeedIncrease = settingStorage
+        .get(SettingBoxKey.enableLongPressSpeedIncrease, defaultValue: false);
   }
 
   // 添加自定义倍速
@@ -114,6 +117,7 @@ class _PlaySpeedPageState extends State<PlaySpeedPage> {
                 customSpeedsList.add(customSpeed);
                 await videoStorage.put(
                     VideoBoxKey.customSpeedsList, customSpeedsList);
+                PlPlayerController.updateSettingsIfExist();
                 setState(() {});
                 Get.back();
               },
@@ -197,6 +201,7 @@ class _PlaySpeedPageState extends State<PlaySpeedPage> {
       customSpeedsList.removeAt(index);
       await videoStorage.put(VideoBoxKey.customSpeedsList, customSpeedsList);
     }
+    PlPlayerController.updateSettingsIfExist();
     setState(() {});
     SmartDialog.showToast('操作成功');
   }
@@ -218,18 +223,10 @@ class _PlaySpeedPageState extends State<PlaySpeedPage> {
         child: Column(
           crossAxisAlignment: CrossAxisAlignment.start,
           children: [
-            Padding(
-              padding:
-                  const EdgeInsets.only(left: 14, right: 14, top: 6, bottom: 0),
-              child: Text(
-                '点击下方按钮设置默认（长按）倍速',
-                style: TextStyle(color: Theme.of(context).colorScheme.outline),
-              ),
-            ),
             ListTile(
               dense: false,
               title:
-                  Text('默认倍速', style: Theme.of(context).textTheme.titleMedium),
+                  Text('当前默认倍速', style: Theme.of(context).textTheme.titleMedium),
               subtitle: Text(playSpeedDefault.toString()),
             ),
             SetSwitchItem(
@@ -244,6 +241,7 @@ class _PlaySpeedPageState extends State<PlaySpeedPage> {
                   sheetMenu[1] = newItem;
                   enableAutoLongPressSpeed = val;
                 });
+                PlPlayerController.updateSettingsIfExist();
               },
             ),
             !enableAutoLongPressSpeed
@@ -254,6 +252,21 @@ class _PlaySpeedPageState extends State<PlaySpeedPage> {
                     subtitle: Text(longPressSpeedDefault.toString()),
                   )
                 : const SizedBox(),
+            const SetSwitchItem(
+              title: '长按倍速递增',
+              subTitle: '每长按半秒，倍速*1.15，最大8倍速',
+              setKey: SettingBoxKey.enableLongPressSpeedIncrease,
+              defaultVal: false,
+              callFn: PlPlayerController.updateSettingsIfExist,
+            ),
+            Padding(
+              padding:
+              const EdgeInsets.only(left: 14, right: 14, top: 6, bottom: 0),
+              child: Text(
+                '点击下方按钮设置默认倍速、默认长按倍速',
+                style: TextStyle(color: Theme.of(context).colorScheme.outline),
+              ),
+            ),
             Padding(
               padding: const EdgeInsets.only(
                 left: 14,
@@ -335,6 +348,14 @@ class _PlaySpeedPageState extends State<PlaySpeedPage> {
                       ),
                     ),
             ),
+            ListTile(
+              subtitle: Text(
+                '注：由于播放器性能限制，4k、8k视频以大于2倍速播放，可能会出现卡顿、音画不同步等问题，请酌情选择。',
+                style: TextStyle(
+                  color: Theme.of(context).colorScheme.outline,
+                ),
+              ),
+            )
           ],
         ),
       ),
diff --git a/lib/pages/setting/play_setting.dart b/lib/pages/setting/play_setting.dart
index f81ce649e..838dad476 100644
--- a/lib/pages/setting/play_setting.dart
+++ b/lib/pages/setting/play_setting.dart
@@ -72,6 +72,7 @@ class _PlaySettingState extends State<PlaySetting> {
             leading: Icon(Icons.comment_outlined),
             setKey: SettingBoxKey.enableShowDanmaku,
             defaultVal: true,
+            callFn: PlPlayerController.updateSettingsIfExist,
           ),
           ListTile(
             dense: false,
@@ -86,6 +87,7 @@ class _PlaySettingState extends State<PlaySetting> {
             leading: Icon(MdiIcons.playPause),
             setKey: SettingBoxKey.autoPlayEnable,
             defaultVal: true,
+            callFn: PlPlayerController.updateSettingsIfExist,
           ),
           const SetSwitchItem(
             title: '左右侧双击快退/快进',
@@ -141,6 +143,7 @@ class _PlaySettingState extends State<PlaySetting> {
               );
               if (result != null) {
                 setting.put(SettingBoxKey.subtitlePreference, result);
+                PlPlayerController.updateSettingsIfExist();
                 defaultSubtitlePreference = result;
                 setState(() {});
               }
@@ -186,9 +189,7 @@ class _PlaySettingState extends State<PlaySetting> {
             leading: Icon(MdiIcons.locationExit),
             setKey: SettingBoxKey.continuePlayInBackground,
             defaultVal: false,
-            callFn: (val) {
-              SmartDialog.showToast('如果该设置未生效，请重启');
-            },
+            callFn: PlPlayerController.updateSettingsIfExist,
           ),
           const SetSwitchItem(
               title: '应用内小窗',
diff --git a/lib/pages/setting/style_setting.dart b/lib/pages/setting/style_setting.dart
index b782c15e6..7332bf155 100644
--- a/lib/pages/setting/style_setting.dart
+++ b/lib/pages/setting/style_setting.dart
@@ -88,7 +88,7 @@ class _StyleSettingState extends State<StyleSetting> {
                   AutoOrientation.portraitUpMode();
                   SmartDialog.showToast('已关闭横屏适配');
                 }
-                PlPlayerController.updateSettings();
+                PlPlayerController.updateSettingsIfExist();
               }),
           // const SetSwitchItem(
           //   title: '改用侧边栏',
diff --git a/lib/plugin/pl_player/controller.dart b/lib/plugin/pl_player/controller.dart
index acc45ff7e..447feefbd 100644
--- a/lib/plugin/pl_player/controller.dart
+++ b/lib/plugin/pl_player/controller.dart
@@ -88,7 +88,7 @@ class PlPlayerController {
   final Rx<bool> _showControls = false.obs;
   final Rx<bool> _showVolumeStatus = false.obs;
   final Rx<bool> _showBrightnessStatus = false.obs;
-  final Rx<bool> _doubleSpeedStatus = false.obs;
+  final RxDouble _doubleSpeedStatus = 0.0.obs;
   final Rx<bool> _controlsLock = false.obs;
   final Rx<bool> _isFullScreen = false.obs;
   // 默认投稿视频格式
@@ -247,8 +247,8 @@ class PlPlayerController {
   /// 镜像
   Rx<bool> get flipX => _flipX;
 
-  /// 是否长按倍速
-  Rx<bool> get doubleSpeedStatus => _doubleSpeedStatus;
+  /// 长按倍速值（0为非长按倍速）
+  RxDouble get doubleSpeedStatus => _doubleSpeedStatus;
 
   Rx<bool> isBuffering = true.obs;
 
@@ -281,7 +281,8 @@ class PlPlayerController {
   late bool massiveMode;
   late List<double> speedsList;
   // int? defaultDuration;
-  late bool enableAutoLongPressSpeed = false;
+  late bool enableAutoLongPressSpeed;
+  late bool enableLongPressSpeedIncrease;
   late bool enableLongShowControl;
   late bool horizontalScreen;
 
@@ -330,17 +331,11 @@ class PlPlayerController {
     return _instance != null;
   }
 
-  static void updateSettings() {
-    _instance?.horizontalScreen =
-        setting.get(SettingBoxKey.horizontalScreen, defaultValue: false);
-  }
-
   static Future<void> playIfExists(
       {bool repeat = false, bool hideControls = true}) async {
     await _instance?.play(repeat: repeat, hideControls: hideControls);
   }
 
-  // try to get PlayerStatus
   static PlayerStatus? getPlayerStatusIfExists() {
     return _instance?.playerStatus.status.value;
   }
@@ -365,9 +360,11 @@ class PlPlayerController {
     await _instance?.setVolume(volumeNew, videoPlayerVolume: videoPlayerVolume);
   }
 
-  // 添加一个私有构造函数
-  PlPlayerController._() {
-    _videoType = videoType;
+  static void updateSettingsIfExist() {
+    _instance?.updateSettings();
+  }
+
+  void updateSettings() {
     isOpenDanmu.value =
         setting.get(SettingBoxKey.enableShowDanmaku, defaultValue: true);
     blockTypes = setting.get(SettingBoxKey.danmakuBlockType, defaultValue: []);
@@ -403,14 +400,16 @@ class PlPlayerController {
         .toDouble();
     enableAutoLongPressSpeed = setting
         .get(SettingBoxKey.enableAutoLongPressSpeed, defaultValue: false);
-    // 后台播放
-    _continuePlayInBackground.value = setting
-        .get(SettingBoxKey.continuePlayInBackground, defaultValue: false);
+    enableLongPressSpeedIncrease = setting
+        .get(SettingBoxKey.enableLongPressSpeedIncrease, defaultValue: false);
     if (!enableAutoLongPressSpeed) {
       _longPressSpeed.value = videoStorage
           .get(VideoBoxKey.longPressSpeedDefault, defaultValue: 3.0)
           .toDouble();
     }
+    // 后台播放
+    _continuePlayInBackground.value = setting
+        .get(SettingBoxKey.continuePlayInBackground, defaultValue: false);
     enableLongShowControl =
         setting.get(SettingBoxKey.enableLongShowControl, defaultValue: false);
     horizontalScreen =
@@ -439,6 +438,12 @@ class PlPlayerController {
       speedsList.add(i.value);
     }
     speedsList.sort();
+  }
+
+  // 添加一个私有构造函数
+  PlPlayerController._() {
+    _videoType = videoType;
+    updateSettings();
     // _playerEventSubs = onPlayerStatusChanged.listen((PlayerStatus status) {
     //   if (status == PlayerStatus.playing) {
     //     WakelockPlus.enable();
@@ -560,32 +565,8 @@ class PlPlayerController {
       }
       await _initializePlayer(seekTo: seekTo);
       if (videoType.value != 'live' && _cid != 0) {
-        refreshSubtitles().then((value) {
-          if (_vttSubtitles.isNotEmpty) {
-            if (_vttSubtitlesIndex > 0 &&
-                _vttSubtitlesIndex < _vttSubtitles.length) {
-              setSubtitle(_vttSubtitlesIndex.value);
-            } else {
-              String preference = setting.get(SettingBoxKey.subtitlePreference,
-                  defaultValue: SubtitlePreference.values.first.code);
-              if (preference == 'on') {
-                setSubtitle(1);
-              } else if (preference == 'withoutAi') {
-                bool found = false;
-                for (int i = 1; i < _vttSubtitles.length; i++) {
-                  if (_vttSubtitles[i]['language']!.startsWith('ai')) {
-                    continue;
-                  }
-                  found = true;
-                  setSubtitle(i);
-                  break;
-                }
-                if (!found) _vttSubtitlesIndex.value = 0;
-              } else {
-                _vttSubtitlesIndex.value = 0;
-              }
-            }
-          }
+        refreshSubtitles().then((_) {
+          chooseSubtitle();
         });
       }
     } catch (err, stackTrace) {
@@ -964,7 +945,7 @@ class PlPlayerController {
     //   danmakuController!.updateOption(updatedOption);
     // } catch (_) {}
     // fix 长按倍速后放开不恢复
-    if (!doubleSpeedStatus.value) {
+    if (doubleSpeedStatus.value == 0) {
       _playbackSpeed.value = speed;
     }
   }
@@ -1267,12 +1248,23 @@ class PlPlayerController {
     if (controlsLock.value) {
       return;
     }
-    _doubleSpeedStatus.value = val;
     if (val) {
-      await setPlaybackSpeed(
-          enableAutoLongPressSpeed ? playbackSpeed * 2 : longPressSpeed);
+      _doubleSpeedStatus.value =
+          enableAutoLongPressSpeed ? playbackSpeed * 2 : longPressSpeed;
+      await setPlaybackSpeed(_doubleSpeedStatus.value);
+      if (enableLongPressSpeedIncrease) {
+        Timer.periodic(const Duration(milliseconds: 500), (timer) async {
+          if (_doubleSpeedStatus.value > 0) {
+            _doubleSpeedStatus.value = min(8, _doubleSpeedStatus.value * 1.15);
+            await setPlaybackSpeed(_doubleSpeedStatus.value);
+          } else {
+            timer.cancel();
+          }
+        });
+      }
     } else {
-      print(playbackSpeed);
+      print("playbackSpeed: $playbackSpeed");
+      _doubleSpeedStatus.value = 0;
       await setPlaybackSpeed(playbackSpeed);
     }
   }
@@ -1654,6 +1646,45 @@ class PlPlayerController {
     return;
   }
 
+  void chooseSubtitle() {
+    if (_vttSubtitles.isEmpty) return;
+
+    int findSubtitleWithoutAi() {
+      return _vttSubtitles.indexWhere((element) {
+        return !element['language']!.startsWith('ai');
+      });
+    }
+
+    void setSubtitleFallback(int defaultIndex) {
+      int index = findSubtitleWithoutAi();
+      setSubtitle(index != -1 ? index : defaultIndex);
+    }
+
+    String preference = setting.get(SettingBoxKey.subtitlePreference,
+        defaultValue: SubtitlePreference.values.first.code);
+
+    if (_vttSubtitlesIndex < 1 || _vttSubtitlesIndex >= _vttSubtitles.length) {
+      switch (preference) {
+        case 'on':
+          setSubtitleFallback(1);
+          break;
+        case 'withoutAi':
+          setSubtitleFallback(0);
+          break;
+        default:
+          setSubtitle(0);
+      }
+      return;
+    }
+
+    if (_vttSubtitles[_vttSubtitlesIndex.value]['language']!.startsWith('ai')) {
+      setSubtitleFallback(
+          preference == 'withoutAi' ? 0 : _vttSubtitlesIndex.value);
+    } else {
+      setSubtitle(_vttSubtitlesIndex.value);
+    }
+  }
+
   // 设定字幕轨道
   setSubtitle(int index) {
     if (index == 0) {
diff --git a/lib/plugin/pl_player/view.dart b/lib/plugin/pl_player/view.dart
index e6d81a27f..b2f4089ac 100644
--- a/lib/plugin/pl_player/view.dart
+++ b/lib/plugin/pl_player/view.dart
@@ -842,7 +842,7 @@ class _PLVideoPlayerState extends State<PLVideoPlayer>
               translation: const Offset(0.0, 0.3), // 上下偏移量（负数向上偏移）
               child: AnimatedOpacity(
                 curve: Curves.easeInOut,
-                opacity: _.doubleSpeedStatus.value ? 1.0 : 0.0,
+                opacity: _.doubleSpeedStatus.value > 0 ? 1.0 : 0.0,
                 duration: const Duration(milliseconds: 150),
                 child: Container(
                     alignment: Alignment.center,
@@ -851,10 +851,12 @@ class _PLVideoPlayerState extends State<PLVideoPlayer>
                       borderRadius: BorderRadius.circular(16.0),
                     ),
                     height: 32.0,
-                    width: 70.0,
+                    width: 85.0,
                     child: Center(
                       child: Obx(() => Text(
-                            '${_.enableAutoLongPressSpeed ? _.playbackSpeed * 2 : _.longPressSpeed}倍速中',
+                            _.doubleSpeedStatus.value > 0
+                                ? '${_.doubleSpeedStatus.value.toStringAsFixed(2)}倍速中'
+                                : '${_.playbackSpeed}倍速',
                             style: const TextStyle(
                                 color: Colors.white, fontSize: 13),
                           )),
diff --git a/lib/plugin/pl_player/widgets/bottom_control.dart b/lib/plugin/pl_player/widgets/bottom_control.dart
index 451ddf0fc..b5824dc08 100644
--- a/lib/plugin/pl_player/widgets/bottom_control.dart
+++ b/lib/plugin/pl_player/widgets/bottom_control.dart
@@ -6,8 +6,7 @@ import 'package:get/get.dart';
 import 'package:nil/nil.dart';
 import 'package:PiliPalaX/plugin/pl_player/index.dart';
 import 'package:PiliPalaX/utils/feed_back.dart';
-//dart-math
-import 'dart:math' as math;
+import 'dart:math';
 
 import '../../../common/widgets/audio_video_progress_bar.dart';
 
@@ -32,9 +31,9 @@ class BottomControl extends StatelessWidget implements PreferredSizeWidget {
     double lastAnnouncedValue = -1;
     return Obx(() {
       final int value = _.sliderPositionSeconds.value;
-      final int max = _.durationSeconds.value;
+      final int durationSec = _.durationSeconds.value;
       final int buffer = _.bufferedSeconds.value;
-      if (value > max || max <= 0) {
+      if (value > durationSec || durationSec <= 0) {
         return nil;
       }
       bool isEquivalentFullScreen = _.isFullScreen.value ||
@@ -54,12 +53,12 @@ class BottomControl extends StatelessWidget implements PreferredSizeWidget {
                   bottom: 3 + (isEquivalentFullScreen ? Get.height * 0.01 : 0)),
               child: Semantics(
                   // label: '${(value / max * 100).round()}%',
-                  value: '${(value / max * 100).round()}%',
+                  value: '${(value / durationSec * 100).round()}%',
                   // enabled: false,
                   child: ProgressBar(
                     progress: Duration(seconds: value),
                     buffered: Duration(seconds: buffer),
-                    total: Duration(seconds: max),
+                    total: Duration(seconds: durationSec),
                     progressBarColor: colorTheme,
                     baseBarColor: Colors.white.withOpacity(0.2),
                     bufferedBarColor: colorTheme.withOpacity(0.4),
@@ -74,7 +73,7 @@ class BottomControl extends StatelessWidget implements PreferredSizeWidget {
                       _.onChangedSliderStart();
                     },
                     onDragUpdate: (duration) {
-                      double newProgress = duration.timeStamp.inSeconds / max;
+                      double newProgress = duration.timeStamp.inSeconds / durationSec;
                       if ((newProgress - lastAnnouncedValue).abs() > 0.02) {
                         accessibilityDebounce?.cancel();
                         accessibilityDebounce =
@@ -93,7 +92,7 @@ class BottomControl extends StatelessWidget implements PreferredSizeWidget {
                       _.seekTo(Duration(seconds: duration.inSeconds),
                           type: 'slider');
                       SemanticsService.announce(
-                          "${(duration.inSeconds / max * 100).round()}%",
+                          "${(duration.inSeconds / durationSec * 100).round()}%",
                           TextDirection.ltr);
                     },
                   )),
@@ -104,7 +103,7 @@ class BottomControl extends StatelessWidget implements PreferredSizeWidget {
             ),
             const SizedBox(height: 6),
             if (isEquivalentFullScreen)
-              SizedBox(height: math.max(Get.height * 0.08 - 15, 0)),
+              SizedBox(height: max(Get.height * 0.08 - 15, 0)),
           ],
         ),
       );
diff --git a/lib/utils/storage.dart b/lib/utils/storage.dart
index deb935c4e..ca3e79bcb 100644
--- a/lib/utils/storage.dart
+++ b/lib/utils/storage.dart
@@ -146,6 +146,7 @@ class SettingBoxKey {
       autoPiP = 'autoPiP',
       pipNoDanmaku = 'pipNoDanmaku',
       enableAutoLongPressSpeed = 'enableAutoLongPressSpeed',
+      enableLongPressSpeedIncrease = 'enableLongPressSpeedIncrease',
       subtitlePreference = 'subtitlePreference',
       playerGestureActionMap = 'playerGestureActionMap',
       // youtube 双击快进快退