fix(streaming): optimize quality, audio sync, and content update refresh

- Increased FFmpeg video quality to 8Mbps and audio to 192kbps.
- Added audio resync filters and better presets.
- Optimized HLS buffer settings for mobile players to reduce interruptions.
- Reduced API cache duration to 15m and added refresh support for faster content updates.

bin/api/streaming_handler.dart

@@ -153,16 +153,17 @@ Handler createLiveStreamHandler(
         '-i', targetUrl,
         // Video
         if (useNvidiaGpu) ...[
-          '-c:v', 'h264_nvenc', '-preset', 'p1', '-tune', 'll',
-          '-b:v', '3500k', '-maxrate', '4000k', '-bufsize', '7000k',
-          '-g', '50', // Force keyframes every 2s
+          '-c:v', 'h264_nvenc', '-preset', 'p4', '-tune', 'hq', // Better quality preset for NVENC
+          '-b:v', '8000k', '-maxrate', '12000k', '-bufsize', '16000k', // Quality native / high bitrate
+          '-g', '50', 
         ] else ...[
-          '-c:v', 'libx264', '-preset', 'ultrafast', '-tune', 'zerolatency',
-          '-b:v', '3000k', '-maxrate', '3500k', '-bufsize', '6000k',
-          '-g', '50', // Force keyframes every 2s (CRITICAL for HLS)
+          '-c:v', 'libx264', '-preset', 'medium', '-tune', 'zerolatency', // Better detail than ultrafast
+          '-b:v', '6000k', '-maxrate', '8000k', '-bufsize', '12000k',
+          '-g', '50', 
         ],
-        // Audio
-        '-c:a', 'aac', '-b:a', '128k', '-ac', '2',
+        // Audio: High quality + Sync filter
+        '-c:a', 'aac', '-b:a', '192k', '-ac', '2', '-ar', '48000',
+        '-af', 'aresample=async=1', 
         // HLS Sliding Window
         '-f', 'hls',
         '-hls_time', '2',
@@ -390,20 +391,16 @@ Handler createVodStreamHandler(
           '-c:v',
           'libx264',
           '-preset',
-          'ultrafast',
-          '-tune',
-          'zerolatency',
-          '-tune',
-          'fastdecode',
+          'medium', // Quality over raw speed for VOD
           '-crf',
-          '23',
+          '18', // Near-native visual quality
           '-maxrate',
-          '3000k',
+          '12000k',
           '-bufsize',
-          '6000k',
+          '24000k',
           '-pix_fmt',
           'yuv420p',
-          '-g', '48', // Force keyframes
+          '-g', '48',
           '-threads',
           '0',
         ]);

lib/features/iptv/services/xtream_service.dart

@@ -28,8 +28,8 @@ class XtreamService {
     // Use MemCacheStore on Web to avoid path errors
     _cacheOptions = CacheOptions(
       store: kIsWeb ? MemCacheStore() : HiveCacheStore('./cache'),
-      policy: CachePolicy.forceCache,
-      maxStale: const Duration(hours: 1),
+      policy: CachePolicy.refresh, // Allow refresh if stale
+      maxStale: const Duration(minutes: 15), // Reduced from 1h to 15m for better sync
       priority: CachePriority.high,
     );
 
@@ -112,7 +112,7 @@ class XtreamService {
           'username': _currentPlaylist!.username,
           'password': _currentPlaylist!.password,
         },
-        options: Options(extra: _cacheOptions.toExtra()),
+        options: Options(extra: options),
       );
 
       return response.data as Map<String, dynamic>;
@@ -133,7 +133,7 @@ class XtreamService {
           'password': _currentPlaylist!.password,
           'action': 'get_live_categories',
         },
-        options: Options(extra: _cacheOptions.toExtra()),
+        options: Options(extra: options),
       );
 
       final List<dynamic> categories = response.data as List<dynamic>;
@@ -157,9 +157,13 @@ class XtreamService {
   /// Get all live TV channels grouped by category
   ///
   /// Returns a Map where key is category name and value is list of channels
-  Future<Map<String, List<Channel>>> getLiveChannels() async {
+  Future<Map<String, List<Channel>>> getLiveChannels({bool refresh = false}) async {
     if (_currentPlaylist == null) throw Exception('No playlist configured');
 
+    final options = refresh 
+        ? _cacheOptions.copyWith(policy: CachePolicy.refreshForceCache).toExtra()
+        : _cacheOptions.toExtra();
+
     try {
       // First, load categories to get the mapping
       final categoryMap = await _getLiveCategories();
@@ -171,7 +175,7 @@ class XtreamService {
           'password': _currentPlaylist!.password,
           'action': 'get_live_streams',
         },
-        options: Options(extra: _cacheOptions.toExtra()),
+        options: Options(extra: options),
       );
 
       final List<dynamic> streams = response.data as List<dynamic>;
@@ -212,7 +216,7 @@ class XtreamService {
           'password': _currentPlaylist!.password,
           'action': 'get_vod_categories',
         },
-        options: Options(extra: _cacheOptions.toExtra()),
+        options: Options(extra: options),
       );
 
       final List<dynamic> categories = response.data as List<dynamic>;
@@ -232,9 +236,13 @@ class XtreamService {
   }
 
   /// Get all VOD items (movies) grouped by category
-  Future<Map<String, List<VodItem>>> getVodItems() async {
+  Future<Map<String, List<VodItem>>> getVodItems({bool refresh = false}) async {
     if (_currentPlaylist == null) throw Exception('No playlist configured');
 
+    final options = refresh 
+        ? _cacheOptions.copyWith(policy: CachePolicy.refreshForceCache).toExtra()
+        : _cacheOptions.toExtra();
+
     try {
       final categoryMap = await _getVodCategories();
 
@@ -245,7 +253,7 @@ class XtreamService {
           'password': _currentPlaylist!.password,
           'action': 'get_vod_streams',
         },
-        options: Options(extra: _cacheOptions.toExtra()),
+        options: Options(extra: options),
       );
 
       final List<dynamic> vods = response.data as List<dynamic>;
@@ -283,7 +291,7 @@ class XtreamService {
           'password': _currentPlaylist!.password,
           'action': 'get_series_categories',
         },
-        options: Options(extra: _cacheOptions.toExtra()),
+        options: Options(extra: options),
       );
 
       final List<dynamic> categories = response.data as List<dynamic>;
@@ -303,9 +311,13 @@ class XtreamService {
   }
 
   /// Get all series grouped by category
-  Future<Map<String, List<Series>>> getSeries() async {
+  Future<Map<String, List<Series>>> getSeries({bool refresh = false}) async {
     if (_currentPlaylist == null) throw Exception('No playlist configured');
 
+    final options = refresh 
+        ? _cacheOptions.copyWith(policy: CachePolicy.refreshForceCache).toExtra()
+        : _cacheOptions.toExtra();
+
     try {
       final categoryMap = await _getSeriesCategories();
 
@@ -316,7 +328,7 @@ class XtreamService {
           'password': _currentPlaylist!.password,
           'action': 'get_series',
         },
-        options: Options(extra: _cacheOptions.toExtra()),
+        options: Options(extra: options),
       );
 
       final List<dynamic> seriesList = response.data as List<dynamic>;
@@ -358,7 +370,7 @@ class XtreamService {
           'password': _currentPlaylist!.password,
           'action': 'get_vod_streams',
         },
-        options: Options(extra: _cacheOptions.toExtra()),
+        options: Options(extra: options),
       );
 
       final List<dynamic> allMovies = response.data as List<dynamic>;
@@ -397,7 +409,7 @@ class XtreamService {
           'password': _currentPlaylist!.password,
           'action': 'get_vod_streams',
         },
-        options: Options(extra: _cacheOptions.toExtra()),
+        options: Options(extra: options),
       );
 
       final List<dynamic> allMovies = response.data as List<dynamic>;
@@ -438,7 +450,7 @@ class XtreamService {
           'password': _currentPlaylist!.password,
           'action': 'get_series',
         },
-        options: Options(extra: _cacheOptions.toExtra()),
+        options: Options(extra: options),
       );
 
       final List<dynamic> allSeries = response.data as List<dynamic>;
@@ -477,7 +489,7 @@ class XtreamService {
           'password': _currentPlaylist!.password,
           'action': 'get_series',
         },
-        options: Options(extra: _cacheOptions.toExtra()),
+        options: Options(extra: options),
       );
 
       final List<dynamic> allSeries = response.data as List<dynamic>;
@@ -515,7 +527,7 @@ class XtreamService {
           'action': 'get_series_info',
           'series_id': seriesId,
         },
-        options: Options(extra: _cacheOptions.toExtra()),
+        options: Options(extra: options),
       );
 
       return xm.SeriesInfo.fromJson(response.data as Map<String, dynamic>);
@@ -539,7 +551,7 @@ class XtreamService {
           'action': 'get_vod_info',
           'vod_id': vodId,
         },
-        options: Options(extra: _cacheOptions.toExtra()),
+        options: Options(extra: options),
       );
 
       final data = response.data as Map<String, dynamic>;

web/player_lite.html

@@ -243,10 +243,12 @@
             }
 
             const hls = new Hls({
-                maxBufferLength: 60,
-                maxMaxBufferLength: 120,
+                maxBufferLength: 30, // 30s is plenty for desktop stability
+                maxMaxBufferLength: 60,
                 enableWorker: true,
-                liveSyncDurationCount: 5
+                liveSyncDurationCount: 3,
+                liveMaxLatencyDurationCount: 10,
+                lowLatencyMode: true
             });
 
             window.hlsInstance = hls;
@@ -281,8 +283,9 @@
                 url: url
             }, {
                 enableWorker: true,
-                stashInitialSize: 1024 * 1024,
-                enableStashBuffer: true
+                stashInitialSize: 512 * 1024, // Smaller stash for faster start and better audio sync
+                enableStashBuffer: true,
+                lazyLoad: false
             });
 
             player.attachMediaElement(video);

web/player_mobile.html

@@ -229,12 +229,12 @@
             if (isHLS && Hls.isSupported()) {
                 log('Using Hls.js optimized for mobile');
                 const hls = new Hls({
-                    maxBufferLength: 90,
-                    maxMaxBufferLength: 180,
-                    liveSyncDurationCount: 6,
-                    liveMaxLatencyDurationCount: 12,
+                    maxBufferLength: 30,
+                    maxMaxBufferLength: 60,
+                    liveSyncDurationCount: 3,
+                    liveMaxLatencyDurationCount: 10,
                     enableWorker: true,
-                    lowLatencyMode: false
+                    lowLatencyMode: true
                 });
                 hls.loadSource(streamUrl);
                 hls.attachMedia(video);