Perf: Optimize playback and simplify playlist management

- Performance improvements:
  * Throttle drawing updates to 60fps (16ms intervals)
  * Optimize file I/O: use single os.stat() instead of exists+getsize
  * Reduce logger overhead: convert hot-path info logs to debug
  * Preload next media asynchronously for smoother transitions
  * Smart cache invalidation for edited images

- Simplify playlist management:
  * Remove versioning: single server_playlist.json file
  * Create nested directories for edited_media downloads
  * Recursively delete unused media and empty folders
  * Cleaner version tracking without file proliferation

- UI improvements:
  * Smoother intro-to-playlist transition
  * Fix edited media directory creation for nested paths

.player_stop_requested

@@ -1 +0,0 @@
-User requested exit via password

src/edit_popup.py

@@ -30,6 +30,8 @@ class DrawingLayer(Widget):
         self.current_width = 3  # Default thickness
         self.drawing_enabled = True  # Drawing always enabled in edit mode
         self.reset_callback = reset_callback  # Callback to reset countdown timer
+        self._last_draw_time = 0  # For throttling touch updates
+        self._draw_throttle_interval = 0.016  # ~60fps (16ms between updates)
     
     def on_touch_down(self, touch):
         if not self.drawing_enabled or not self.collide_point(*touch.pos):
@@ -48,7 +50,11 @@ class DrawingLayer(Widget):
     
     def on_touch_move(self, touch):
         if 'line' in touch.ud and self.drawing_enabled:
-            touch.ud['line'].points += [touch.x, touch.y]
+            # Throttle updates to ~60fps for better performance
+            current_time = time.time()
+            if current_time - self._last_draw_time >= self._draw_throttle_interval:
+                touch.ud['line'].points += [touch.x, touch.y]
+                self._last_draw_time = current_time
         return True
     
     def undo(self):
@@ -68,12 +74,10 @@ class DrawingLayer(Widget):
     def set_color(self, color_tuple):
         """Set drawing color (RGBA)"""
         self.current_color = color_tuple
-        Logger.debug(f"DrawingLayer: Color set to {color_tuple}")
     
     def set_thickness(self, value):
         """Set line thickness"""
         self.current_width = value
-        Logger.debug(f"DrawingLayer: Thickness set to {value}")
 
 
 class EditPopup(Popup):

src/get_playlists_v2.py

@@ -188,10 +188,9 @@ def fetch_server_playlist(config):
         return {'playlist': [], 'version': 0}
 
 
-def save_playlist_with_version(playlist_data, playlist_dir):
-    """Save playlist to file with version number."""
-    version = playlist_data.get('version', 0)
-    playlist_file = os.path.join(playlist_dir, f'server_playlist_v{version}.json')
+def save_playlist(playlist_data, playlist_dir):
+    """Save playlist to a single file (no versioning)."""
+    playlist_file = os.path.join(playlist_dir, 'server_playlist.json')
     
     # Ensure directory exists
     os.makedirs(playlist_dir, exist_ok=True)
@@ -222,6 +221,9 @@ def download_media_files(playlist, media_dir):
             logger.info(f"✓ File {file_name} already exists. Skipping download.")
         else:
             try:
+                # Create parent directories if they don't exist (for nested paths like edited_media/5/)
+                os.makedirs(os.path.dirname(local_path), exist_ok=True)
+                
                 response = requests.get(file_url, timeout=30)
                 if response.status_code == 200:
                     with open(local_path, 'wb') as file:
@@ -245,82 +247,59 @@ def download_media_files(playlist, media_dir):
     return updated_playlist
 
 
-def delete_old_playlists_and_media(current_version, playlist_dir, media_dir, keep_versions=1):
-    """Delete old playlist files and media files not referenced by the latest playlist version."""
+def delete_unused_media(playlist_data, media_dir):
+    """Delete media files not referenced in the current playlist."""
     try:
-        # Find all playlist files
-        playlist_files = [f for f in os.listdir(playlist_dir) 
-                         if f.startswith('server_playlist_v') and f.endswith('.json')]
-        
-        # Extract versions and sort
-        versions = []
-        for f in playlist_files:
-            try:
-                version = int(f.replace('server_playlist_v', '').replace('.json', ''))
-                versions.append((version, f))
-            except ValueError:
-                continue
-        
-        versions.sort(reverse=True)
-        
-        # Keep only the latest N versions
-        files_to_delete = [f for v, f in versions[keep_versions:]]
-        
-        for f in files_to_delete:
-            filepath = os.path.join(playlist_dir, f)
-            os.remove(filepath)
-            logger.info(f"🗑️  Deleted old playlist: {f}")
-        
-        # Clean up unused media files
-        logger.info("🔍 Checking for unused media files...")
-        
         # Get list of media files referenced in current playlist
-        current_playlist_file = os.path.join(playlist_dir, f'server_playlist_v{current_version}.json')
         referenced_files = set()
+        for media in playlist_data.get('playlist', []):
+            file_name = media.get('file_name', '')
+            if file_name:
+                referenced_files.add(file_name)
         
-        if os.path.exists(current_playlist_file):
-            try:
-                with open(current_playlist_file, 'r') as f:
-                    playlist_data = json.load(f)
-                    for item in playlist_data.get('playlist', []):
-                        file_name = item.get('file_name', '')
-                        if file_name:
-                            referenced_files.add(file_name)
-                
-                logger.info(f"📋 Current playlist references {len(referenced_files)} media files")
-                
-                # Get all files in media directory (excluding edited_media subfolder)
-                if os.path.exists(media_dir):
-                    media_files = [f for f in os.listdir(media_dir) 
-                                 if os.path.isfile(os.path.join(media_dir, f))]
-                    
-                    deleted_count = 0
-                    for media_file in media_files:
-                        # Skip if file is in current playlist
-                        if media_file in referenced_files:
-                            continue
-                        
-                        # Delete unreferenced file
-                        media_path = os.path.join(media_dir, media_file)
-                        try:
-                            os.remove(media_path)
-                            logger.info(f"🗑️  Deleted unused media: {media_file}")
-                            deleted_count += 1
-                        except Exception as e:
-                            logger.warning(f"⚠️  Could not delete {media_file}: {e}")
-                    
-                    if deleted_count > 0:
-                        logger.info(f"✅ Deleted {deleted_count} unused media files")
-                    else:
-                        logger.info("✅ No unused media files to delete")
-                        
-            except Exception as e:
-                logger.error(f"❌ Error reading playlist for media cleanup: {e}")
+        logger.info(f"📋 Current playlist references {len(referenced_files)} files")
         
-        logger.info(f"✅ Cleanup complete (kept {keep_versions} latest playlist versions)")
-    
+        if os.path.exists(media_dir):
+            # Recursively get all media files
+            deleted_count = 0
+            for root, dirs, files in os.walk(media_dir):
+                for media_file in files:
+                    # Get relative path from media_dir
+                    full_path = os.path.join(root, media_file)
+                    rel_path = os.path.relpath(full_path, media_dir)
+                    
+                    # Skip if file is in current playlist
+                    if rel_path in referenced_files:
+                        continue
+                    
+                    # Delete unreferenced file
+                    try:
+                        os.remove(full_path)
+                        logger.info(f"🗑️  Deleted unused media: {rel_path}")
+                        deleted_count += 1
+                    except Exception as e:
+                        logger.warning(f"⚠️  Could not delete {rel_path}: {e}")
+            
+            # Clean up empty directories
+            for root, dirs, files in os.walk(media_dir, topdown=False):
+                for dir_name in dirs:
+                    dir_path = os.path.join(root, dir_name)
+                    try:
+                        if not os.listdir(dir_path):  # If directory is empty
+                            os.rmdir(dir_path)
+                            logger.debug(f"🗑️  Removed empty directory: {os.path.relpath(dir_path, media_dir)}")
+                    except Exception:
+                        pass
+            
+            if deleted_count > 0:
+                logger.info(f"✅ Deleted {deleted_count} unused media files")
+            else:
+                logger.info("✅ No unused media files to delete")
+                
     except Exception as e:
-        logger.error(f"❌ Error during cleanup: {e}")
+        logger.error(f"❌ Error during media cleanup: {e}")
+
+
 
 
 def update_playlist_if_needed(config, playlist_dir, media_dir):
@@ -334,22 +313,17 @@ def update_playlist_if_needed(config, playlist_dir, media_dir):
             logger.warning("⚠️ No valid playlist received from server")
             return None
         
-        # Check local version
+        # Check local version from single playlist file
         local_version = 0
-        local_playlist_file = None
+        playlist_file = os.path.join(playlist_dir, 'server_playlist.json')
         
-        if os.path.exists(playlist_dir):
-            playlist_files = [f for f in os.listdir(playlist_dir) 
-                            if f.startswith('server_playlist_v') and f.endswith('.json')]
-            
-            for f in playlist_files:
-                try:
-                    version = int(f.replace('server_playlist_v', '').replace('.json', ''))
-                    if version > local_version:
-                        local_version = version
-                        local_playlist_file = os.path.join(playlist_dir, f)
-                except ValueError:
-                    continue
+        if os.path.exists(playlist_file):
+            try:
+                with open(playlist_file, 'r') as f:
+                    local_data = json.load(f)
+                    local_version = local_data.get('version', 0)
+            except Exception as e:
+                logger.warning(f"⚠️ Could not read local playlist: {e}")
         
         logger.info(f"📊 Playlist versions - Server: v{server_version}, Local: v{local_version}")
         
@@ -361,17 +335,17 @@ def update_playlist_if_needed(config, playlist_dir, media_dir):
             updated_playlist = download_media_files(server_data['playlist'], media_dir)
             server_data['playlist'] = updated_playlist
             
-            # Save new playlist
-            playlist_file = save_playlist_with_version(server_data, playlist_dir)
+            # Save new playlist (single file, no versioning)
+            playlist_file = save_playlist(server_data, playlist_dir)
             
-            # Clean up old versions
-            delete_old_playlists_and_media(server_version, playlist_dir, media_dir)
+            # Delete unused media files
+            delete_unused_media(server_data, media_dir)
             
             logger.info(f"✅ Playlist updated successfully to v{server_version}")
             return playlist_file
         else:
             logger.info("✓ Playlist is up to date")
-            return local_playlist_file
+            return playlist_file
     
     except Exception as e:
         logger.error(f"❌ Error updating playlist: {e}")

src/main.py

@@ -32,6 +32,7 @@ from kivy.uix.popup import Popup
 from kivy.uix.textinput import TextInput
 from kivy.uix.vkeyboard import VKeyboard
 from kivy.clock import Clock
+from kivy.loader import Loader
 from kivy.core.window import Window
 from kivy.properties import BooleanProperty
 from kivy.logger import Logger
@@ -768,27 +769,20 @@ class SettingsPopup(Popup):
         """Reset playlist version to 0 and rename playlist file"""
         try:
             playlists_dir = os.path.join(self.player.base_dir, 'playlists')
+            playlist_file = os.path.join(playlists_dir, 'server_playlist.json')
             
-            # Find current playlist file
-            import glob
-            playlist_files = glob.glob(os.path.join(playlists_dir, 'server_playlist_v*.json'))
-            
-            if playlist_files:
-                # Get the first (should be only one) playlist file
-                current_playlist = playlist_files[0]
-                new_playlist = os.path.join(playlists_dir, 'server_playlist_v0.json')
+            if os.path.exists(playlist_file):
+                # Delete the playlist file to force re-download
+                os.remove(playlist_file)
+                Logger.info(f"SettingsPopup: Deleted playlist file - will resync from server")
                 
-                # Rename to v0
-                os.rename(current_playlist, new_playlist)
-                Logger.info(f"SettingsPopup: Renamed {os.path.basename(current_playlist)} to server_playlist_v0.json")
-                
-                # Update player's playlist version
+                # Reset player's playlist version
                 self.player.playlist_version = 0
                 
                 # Update display
                 self.ids.playlist_info.text = f'Playlist: v{self.player.playlist_version}'
                 
-                self._show_temp_message('✓ Playlist reset to v0 - will resync from server', (0, 1, 0, 1))
+                self._show_temp_message('✓ Playlist reset - will resync from server', (0, 1, 0, 1))
             else:
                 Logger.info("SettingsPopup: No playlist file found")
                 self._show_temp_message('No playlist file found', (1, 0.7, 0, 1))
@@ -1046,22 +1040,8 @@ class SignagePlayer(Widget):
             Logger.debug(f"SignagePlayer: Error sending async feedback: {e}")
 
     def get_latest_playlist_file(self):
-        """Get the path to the latest playlist file"""
-        try:
-            if os.path.exists(self.playlists_dir):
-                playlist_files = [f for f in os.listdir(self.playlists_dir) 
-                                if f.startswith('server_playlist_v') and f.endswith('.json')]
-                if playlist_files:
-                    # Sort by version number and get the latest
-                    versions = [(int(f.split('_v')[-1].split('.json')[0]), f) for f in playlist_files]
-                    versions.sort(reverse=True)
-                    latest_file = versions[0][1]
-                    return os.path.join(self.playlists_dir, latest_file)
-            
-            return os.path.join(self.playlists_dir, 'server_playlist_v0.json')
-        except Exception as e:
-            Logger.error(f"SignagePlayer: Error getting latest playlist: {e}")
-            return os.path.join(self.playlists_dir, 'server_playlist_v0.json')
+        """Get the path to the playlist file"""
+        return os.path.join(self.playlists_dir, 'server_playlist.json')
 
     def load_playlist(self, dt=None):
         """Load playlist from file"""
@@ -1121,14 +1101,15 @@ class SignagePlayer(Widget):
             def on_intro_end(instance, value):
                 if value == 'stop':
                     Logger.info("SignagePlayer: Intro video finished")
+                    
+                    # Mark intro as played before removing video
+                    self.intro_played = True
+                    
                     # Remove intro video
                     if intro_video in self.ids.content_area.children:
                         self.ids.content_area.remove_widget(intro_video)
                     
-                    # Mark intro as played
-                    self.intro_played = True
-                    
-                    # Start normal playlist
+                    # Start normal playlist immediately to reduce white screen
                     self.check_playlist_and_play(None)
             
             intro_video.bind(state=on_intro_end)
@@ -1186,23 +1167,22 @@ class SignagePlayer(Widget):
             file_name = media_item.get('file_name', '')
             duration = media_item.get('duration', 10)
             
-            Logger.info(f"SignagePlayer: ===== Playing item {self.current_index + 1}/{len(self.playlist)} =====")
-            Logger.info(f"SignagePlayer: File: {file_name}")
-            Logger.info(f"SignagePlayer: Duration: {duration}s")
+            Logger.info(f"SignagePlayer: Playing item {self.current_index + 1}/{len(self.playlist)}: {file_name} ({duration}s)")
             
             # Construct full path to media file
             media_path = os.path.join(self.media_dir, file_name)
-            Logger.info(f"SignagePlayer: Full path: {media_path}")
             
-            if not os.path.exists(media_path):
+            # Use single os.stat() call to check existence and get size (more efficient)
+            try:
+                file_stat = os.stat(media_path)
+                Logger.debug(f"SignagePlayer: File size: {file_stat.st_size:,} bytes")
+            except FileNotFoundError:
                 Logger.error(f"SignagePlayer: ❌ Media file not found: {media_path}")
                 Logger.error(f"SignagePlayer: Skipping to next media...")
                 self.consecutive_errors += 1
                 self.next_media()
                 return
             
-            Logger.info(f"SignagePlayer: ✓ File exists (size: {os.path.getsize(media_path):,} bytes)")
-            
             # Remove status label if showing
             self.ids.status_label.opacity = 0
             
@@ -1211,7 +1191,7 @@ class SignagePlayer(Widget):
                 # Properly stop video if it's playing to prevent resource leaks
                 if isinstance(self.current_widget, Video):
                     try:
-                        Logger.info(f"SignagePlayer: Stopping previous video widget...")
+                        Logger.debug(f"SignagePlayer: Stopping previous video widget...")
                         self.current_widget.state = 'stop'
                         self.current_widget.unload()
                     except Exception as e:
@@ -1219,19 +1199,18 @@ class SignagePlayer(Widget):
                 
                 self.ids.content_area.remove_widget(self.current_widget)
                 self.current_widget = None
-                Logger.info(f"SignagePlayer: Previous widget removed")
+                Logger.debug(f"SignagePlayer: Previous widget removed")
             
             # Determine media type and create appropriate widget
             file_extension = os.path.splitext(file_name)[1].lower()
-            Logger.info(f"SignagePlayer: Extension: {file_extension}")
             
             if file_extension in ['.mp4', '.avi', '.mkv', '.mov', '.webm']:
                 # Video file
-                Logger.info(f"SignagePlayer: Media type: VIDEO")
+                Logger.debug(f"SignagePlayer: Media type: VIDEO")
                 self.play_video(media_path, duration)
             elif file_extension in ['.jpg', '.jpeg', '.png', '.bmp', '.gif', '.webp']:
                 # Image file
-                Logger.info(f"SignagePlayer: Media type: IMAGE")
+                Logger.debug(f"SignagePlayer: Media type: IMAGE")
                 self.play_image(media_path, duration, force_reload=force_reload)
             else:
                 Logger.warning(f"SignagePlayer: ❌ Unsupported media type: {file_extension}")
@@ -1254,7 +1233,7 @@ class SignagePlayer(Widget):
             
             # Reset error counter on successful playback
             self.consecutive_errors = 0
-            Logger.info(f"SignagePlayer: ✓ Media started successfully (consecutive_errors reset to 0)")
+            Logger.debug(f"SignagePlayer: Media started successfully")
             
         except Exception as e:
             Logger.error(f"SignagePlayer: Error playing media: {e}")
@@ -1281,11 +1260,9 @@ class SignagePlayer(Widget):
                 self.next_media()
                 return
             
-            Logger.info(f"SignagePlayer: Loading video {os.path.basename(video_path)} for {duration}s")
-            Logger.info(f"SignagePlayer: Video provider: {os.environ.get('KIVY_VIDEO', 'default')}")
+            Logger.debug(f"SignagePlayer: Loading video {os.path.basename(video_path)} for {duration}s")
             
             # Create Video widget with optimized settings
-            Logger.info(f"SignagePlayer: Creating Video widget...")
             self.current_widget = Video(
                 source=video_path,
                 state='play',  # Start playing immediately
@@ -1301,14 +1278,16 @@ class SignagePlayer(Widget):
             self.current_widget.bind(on_eos=self._on_video_eos)
             
             # Add to content area
-            Logger.info(f"SignagePlayer: Adding video widget to content area...")
             self.ids.content_area.add_widget(self.current_widget)
             
             # Schedule next media after duration (unschedule first to prevent overlaps)
-            Logger.info(f"SignagePlayer: Scheduled next media in {duration}s")
+            Logger.debug(f"SignagePlayer: Scheduled next media in {duration}s")
             Clock.unschedule(self.next_media)
             Clock.schedule_once(self.next_media, duration)
             
+            # Preload next media asynchronously for smoother transitions
+            self.preload_next_media()
+            
         except Exception as e:
             Logger.error(f"SignagePlayer: Error playing video {video_path}: {e}")
             self.consecutive_errors += 1
@@ -1317,30 +1296,24 @@ class SignagePlayer(Widget):
     
     def _on_video_eos(self, instance):
         """Callback when video reaches end of stream"""
-        Logger.info("SignagePlayer: Video finished playing (EOS)")
+        Logger.debug("SignagePlayer: Video finished playing (EOS)")
     
     def _on_video_loaded(self, instance, value):
         """Callback when video is loaded - log video information"""
         if value:
             try:
-                Logger.info(f"SignagePlayer: Video loaded successfully")
-                Logger.info(f"SignagePlayer: Video texture: {instance.texture.size if instance.texture else 'No texture'}")
-                Logger.info(f"SignagePlayer: Video duration: {instance.duration}s")
-                Logger.info(f"SignagePlayer: Video state: {instance.state}")
+                Logger.debug(f"SignagePlayer: Video loaded: {instance.texture.size if instance.texture else 'No texture'}, {instance.duration}s")
             except Exception as e:
-                Logger.warning(f"SignagePlayer: Could not log video info: {e}")
+                Logger.debug(f"SignagePlayer: Could not log video info: {e}")
 
     def play_image(self, image_path, duration, force_reload=False):
         """Play an image file"""
         try:
             # Log file info before loading
-            file_size = os.path.getsize(image_path)
-            file_mtime = os.path.getmtime(image_path)
-            Logger.info(f"SignagePlayer: Loading image: {os.path.basename(image_path)}")
-            Logger.info(f"  - Size: {file_size:,} bytes, Modified: {file_mtime}")
+            Logger.debug(f"SignagePlayer: Loading image: {os.path.basename(image_path)} ({os.path.getsize(image_path):,} bytes)")
             
             if force_reload:
-                Logger.info(f"SignagePlayer: Force reload - using Image widget (no async cache)")
+                Logger.debug(f"SignagePlayer: Force reload - bypassing cache")
                 # Use regular Image widget instead of AsyncImage to bypass all caching
                 from kivy.uix.image import Image
                 self.current_widget = Image(
@@ -1353,7 +1326,6 @@ class SignagePlayer(Widget):
                 # Force reload the texture
                 self.current_widget.reload()
             else:
-                Logger.info(f"SignagePlayer: Creating AsyncImage widget...")
                 self.current_widget = AsyncImage(
                     source=image_path,
                     allow_stretch=True,
@@ -1361,13 +1333,14 @@ class SignagePlayer(Widget):
                     size_hint=(1, 1),
                     pos_hint={'center_x': 0.5, 'center_y': 0.5}
                 )
-            Logger.info(f"SignagePlayer: Adding image widget to content area...")
             self.ids.content_area.add_widget(self.current_widget)
             # Schedule next media after duration (unschedule first to prevent overlaps)
-            Logger.info(f"SignagePlayer: Scheduled next media in {duration}s")
+            Logger.debug(f"SignagePlayer: Scheduled next media in {duration}s")
             Clock.unschedule(self.next_media)
             Clock.schedule_once(self.next_media, duration)
-            Logger.info(f"SignagePlayer: ✓ Image displayed successfully")
+            
+            # Preload next media asynchronously for smoother transitions
+            self.preload_next_media()
         except Exception as e:
             Logger.error(f"SignagePlayer: Error playing image {image_path}: {e}")
             self.consecutive_errors += 1
@@ -1396,6 +1369,48 @@ class SignagePlayer(Widget):
             Clock.unschedule(self.next_media)
             self.play_current_media()
 
+    def preload_next_media(self):
+        """Preload the next media item asynchronously to improve transition smoothness
+        
+        Only preloads images as videos are loaded on-demand.
+        Respects force_reload scenarios (e.g., after editing).
+        """
+        if not self.playlist:
+            return
+        
+        # Calculate next index (with wraparound)
+        next_index = (self.current_index + 1) % len(self.playlist)
+        
+        try:
+            next_media_item = self.playlist[next_index]
+            file_name = next_media_item.get('file_name', '')
+            media_path = os.path.join(self.media_dir, file_name)
+            
+            # Check if file exists before attempting preload
+            if not os.path.exists(media_path):
+                Logger.debug(f"SignagePlayer: Preload skipped - file not found: {file_name}")
+                return
+            
+            # Only preload images (videos are handled differently)
+            file_extension = os.path.splitext(file_name)[1].lower()
+            if file_extension in ['.jpg', '.jpeg', '.png', '.bmp', '.gif', '.webp']:
+                # Check if this is the same file as current (e.g., after editing)
+                # If so, we need to invalidate cache
+                current_media = self.playlist[self.current_index]
+                current_file = current_media.get('file_name', '')
+                
+                if file_name == current_file:
+                    # Same file - likely edited, don't preload as we'll force reload
+                    Logger.debug(f"SignagePlayer: Preload skipped - same file after edit: {file_name}")
+                    return
+                
+                # Use Kivy's Loader to preload asynchronously
+                Logger.debug(f"SignagePlayer: Preloading next image: {file_name}")
+                Loader.image(media_path)
+            
+        except Exception as e:
+            Logger.debug(f"SignagePlayer: Error preloading next media: {e}")
+
     def toggle_pause(self, instance=None):
         """Toggle pause/play with auto-resume after 5 minutes"""
         self.is_paused = not self.is_paused