Add support for /seek, /play, /pause commands in chat

.gitignore

@@ -3,3 +3,26 @@ bun.lockb
 .env
 .DS_Store
 Thumbs.db
+
+# Python
+__pycache__/
+*.py[cod]
+*$py.class
+**/.pytest_cache/
+
+# Environments (uv / venv)
+.venv/
+env/
+venv/
+ENV/
+
+# Local media testing files
+*.mkv
+*.mp4
+*.avi
+
+# PyInstaller / Build
+build/
+dist/
+*.spec
+*.exe

desktop-client/.python-version

@@ -0,0 +1 @@
+3.14

desktop-client/build.ps1

@@ -0,0 +1,2 @@
+uv add pyinstaller pillow
+uv run pyinstaller --noconfirm --onefile --windowed --name "VideoSync" --icon "icon.png" --add-data "icon.png;." main.py

desktop-client/check.svg

@@ -0,0 +1,3 @@
+<svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="#4BB543" stroke-width="2" stroke-linecap="round" stroke-linejoin="round">
+    <polyline points="20 6 9 17 4 12"></polyline>
+</svg>

desktop-client/copy.svg

@@ -0,0 +1,4 @@
+<svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="#aaaaaa" stroke-width="2" stroke-linecap="round" stroke-linejoin="round">
+    <rect x="9" y="9" width="13" height="13" rx="2" ry="2"></rect>
+    <path d="M5 15H4a2 2 0 0 1-2-2V4a2 2 0 0 1 2-2h9a2 2 0 0 1 2 2v1"></path>
+</svg>

desktop-client/main.py

@@ -0,0 +1,879 @@
+import sys
+import os
+import ctypes
+from PyQt6.QtWidgets import (
+    QApplication, QMainWindow, QStackedWidget, QWidget, QVBoxLayout,
+    QHBoxLayout, QLabel, QLineEdit, QPushButton, QFileDialog, QMessageBox,
+    QFrame, QSlider, QTextEdit
+)
+from PyQt6.QtCore import Qt, pyqtSignal, QObject, QTimer
+from PyQt6.QtGui import QFont, QIcon, QColor
+from vlc_player import VLCSyncPlayer
+from sync_client import SyncClientThread
+import datetime
+
+class VlcSyncApp(QMainWindow):
+    def __init__(self):
+        super().__init__()
+        self.setWindowTitle("VideoSync — Watch Together")
+        
+        # Set window icon
+        icon_path = os.path.join(os.path.dirname(__file__), "icon.png")
+        if os.path.exists(icon_path):
+            self.setWindowIcon(QIcon(icon_path))
+            
+        self.setMinimumSize(900, 600)
+        self.resize(1100, 700)
+
+        # Main stacked widget to switch between Lobby and Room
+        self.stacked_widget = QStackedWidget()
+        self.setCentralWidget(self.stacked_widget)
+
+        # Setup Views
+        self.lobby_view = self.create_lobby_view()
+        self.room_view = self.create_room_view()
+
+        self.stacked_widget.addWidget(self.lobby_view)
+        self.stacked_widget.addWidget(self.room_view)
+        
+        # State
+        self.username = ""
+        self.room_code = ""
+        self.local_file_path = None
+        self.local_file_name = None
+        self.local_file_size = 0
+        
+        self.pending_connect_action = None
+        self.ignore_vlc_events = False
+        self.last_reported_time_ms = 0
+
+        self.sync_client = SyncClientThread("wss://video-sync.peterstockings.com/ws")
+        self.sync_client.connected.connect(self.on_ws_connected)
+        self.sync_client.room_joined.connect(self.on_room_joined)
+        self.sync_client.room_error.connect(self.on_room_error)
+        self.sync_client.file_check_needed.connect(self.on_file_check_needed)
+        self.sync_client.users_updated.connect(self.on_users_updated)
+        self.sync_client.chat_message.connect(self.on_chat_message)
+        self.sync_client.system_message.connect(self.on_system_message)
+        self.sync_client.sync_event.connect(self.on_sync_event)
+
+        self.apply_stylesheet()
+
+    def create_lobby_view(self):
+        widget = QWidget()
+        layout = QVBoxLayout(widget)
+        layout.setAlignment(Qt.AlignmentFlag.AlignCenter)
+        
+        # Container for centering
+        container = QFrame()
+        container.setObjectName("lobbyCard")
+        container.setFixedWidth(500)
+        container_layout = QVBoxLayout(container)
+        container_layout.setContentsMargins(30, 30, 30, 30)
+        container_layout.setSpacing(15)
+
+        # Brand
+        title = QLabel("VideoSync")
+        title.setObjectName("brandTitle")
+        title.setAlignment(Qt.AlignmentFlag.AlignCenter)
+        tagline = QLabel("Watch together, anywhere")
+        tagline.setObjectName("brandTagline")
+        tagline.setAlignment(Qt.AlignmentFlag.AlignCenter)
+        
+        container_layout.addWidget(title)
+        container_layout.addWidget(tagline)
+        container_layout.addSpacing(20)
+
+        # Username
+        self.username_input = QLineEdit()
+        self.username_input.setPlaceholderText("Enter a display name")
+        container_layout.addWidget(QLabel("YOUR NAME"))
+        container_layout.addWidget(self.username_input)
+        
+        container_layout.addSpacing(20)
+        
+        # Actions Layout (Create vs Join)
+        actions_layout = QHBoxLayout()
+        actions_layout.setSpacing(20)
+        
+        # Create Room Panel
+        create_panel = QVBoxLayout()
+        create_panel.addWidget(QLabel("Create a Room"))
+        self.create_file_btn = QPushButton("Choose Video File")
+        self.create_file_btn.setObjectName("secondaryBtn")
+        self.create_file_btn.clicked.connect(self.select_file)
+        
+        self.create_file_info = QLabel("")
+        self.create_file_info.setObjectName("fileInfo")
+        self.create_file_info.setWordWrap(True)
+        self.create_file_info.hide()
+        
+        self.create_room_btn = QPushButton("Create Room")
+        self.create_room_btn.setObjectName("primaryBtn")
+        self.create_room_btn.setEnabled(False)
+        self.create_room_btn.clicked.connect(self.create_room)
+        
+        create_panel.addWidget(self.create_file_btn)
+        create_panel.addWidget(self.create_file_info)
+        create_panel.addWidget(self.create_room_btn)
+        
+        # Join Room Panel
+        join_panel = QVBoxLayout()
+        join_panel.addWidget(QLabel("Join a Room"))
+        self.room_code_input = QLineEdit()
+        self.room_code_input.setPlaceholderText("e.g. ABC123")
+        self.join_room_btn = QPushButton("Join Room")
+        self.join_room_btn.setObjectName("secondaryBtn")
+        self.join_room_btn.setEnabled(False)
+        self.join_room_btn.clicked.connect(self.join_room)
+        
+        join_panel.addWidget(self.room_code_input)
+        join_panel.addWidget(self.join_room_btn)
+        
+        actions_layout.addLayout(create_panel)
+        
+        # Divider
+        divider = QLabel("OR")
+        divider.setAlignment(Qt.AlignmentFlag.AlignCenter)
+        divider.setObjectName("divider")
+        actions_layout.addWidget(divider)
+        
+        actions_layout.addLayout(join_panel)
+        
+        container_layout.addLayout(actions_layout)
+        layout.addWidget(container)
+
+        # Signals to enable/disable buttons
+        self.username_input.textChanged.connect(self.check_inputs)
+        self.room_code_input.textChanged.connect(self.check_inputs)
+
+        return widget
+
+    def create_room_view(self):
+        widget = QWidget()
+        layout = QHBoxLayout(widget)
+        layout.setContentsMargins(0, 0, 0, 0)
+        layout.setSpacing(0)
+        
+        # --- Left Side: Video ---
+        video_container = QWidget()
+        video_layout = QVBoxLayout(video_container)
+        video_layout.setContentsMargins(0, 0, 0, 0)
+        video_layout.setSpacing(0)
+        
+        # Topbar
+        self.topbar = QFrame()
+        self.topbar.setObjectName("topbar")
+        self.topbar.setFixedHeight(50)
+        topbar_layout = QHBoxLayout(self.topbar)
+        
+        self.room_code_display = QLabel("Room: XXXX")
+        self.copy_code_btn = QPushButton()
+        self.copy_code_btn.setObjectName("iconBtn")
+        self.copy_icon = QIcon(os.path.join(os.path.dirname(__file__), "copy.svg"))
+        self.check_icon = QIcon(os.path.join(os.path.dirname(__file__), "check.svg"))
+        self.copy_code_btn.setIcon(self.copy_icon)
+        self.copy_code_btn.setFixedSize(30, 30)
+        self.copy_code_btn.setToolTip("Copy Room Code")
+        self.copy_code_btn.clicked.connect(self.copy_room_code)
+        
+        self.room_file_badge = QLabel("📄 No file")
+        self.room_file_badge.setObjectName("fileBadge")
+        
+        self.leave_btn = QPushButton("Leave Room")
+        self.leave_btn.setObjectName("dangerBtn")
+        self.leave_btn.clicked.connect(self.leave_room)
+        
+        topbar_layout.addWidget(self.room_code_display)
+        topbar_layout.addWidget(self.copy_code_btn)
+        topbar_layout.addStretch()
+        topbar_layout.addWidget(self.room_file_badge)
+        topbar_layout.addWidget(self.leave_btn)
+        
+        # Video Frame Placeholder
+        self.video_frame = QFrame()
+        self.video_frame.setStyleSheet("background-color: black;")
+        # Fix for Windows QWidgetWindow Error: 
+        # Force the frame to have its own native HWND so VLC can attach to it without complaining it's not a top-level window.
+        self.video_frame.setAttribute(Qt.WidgetAttribute.WA_NativeWindow, True)
+        
+        # Controls Bar
+        controls = QFrame()
+        controls.setObjectName("controlsBar")
+        controls.setFixedHeight(60)
+        controls_layout = QHBoxLayout(controls)
+        
+        self.play_btn = QPushButton("▶")
+        self.play_btn.setFixedSize(40, 40)
+        self.play_btn.setObjectName("playBtn")
+        
+        # Time and SeekBar
+        self.seekbar = QSlider(Qt.Orientation.Horizontal)
+        self.seekbar.setRange(0, 1000)
+        self.seekbar.setObjectName("seekBar")
+        self.seekbar.sliderMoved.connect(self.on_seekbar_dragged)
+        self.seekbar.sliderReleased.connect(self.on_seekbar_released)
+        
+        self.time_lbl = QLabel("00:00:00 / 00:00:00")
+        
+        # Volume
+        self.vol_icon = QLabel("🔊")
+        self.vol_icon.setObjectName("volIcon")
+        self.volume_slider = QSlider(Qt.Orientation.Horizontal)
+        self.volume_slider.setRange(0, 100)
+        self.volume_slider.setValue(100)
+        self.volume_slider.setFixedWidth(100)
+        self.volume_slider.setObjectName("volumeSlider")
+        self.volume_slider.valueChanged.connect(self.on_volume_changed)
+        
+        # Fullscreen
+        self.fullscreen_btn = QPushButton("⛶")
+        self.fullscreen_btn.setFixedSize(40, 40)
+        self.fullscreen_btn.setObjectName("iconBtn")
+        self.fullscreen_btn.clicked.connect(self.toggle_fullscreen)
+        
+        controls_layout.addWidget(self.play_btn)
+        controls_layout.addWidget(self.seekbar, 1) # SeekBar gets the stretch
+        controls_layout.addWidget(self.time_lbl)
+        controls_layout.addSpacing(15)
+        controls_layout.addWidget(self.vol_icon)
+        controls_layout.addWidget(self.volume_slider)
+        controls_layout.addSpacing(10)
+        controls_layout.addWidget(self.fullscreen_btn)
+        
+        video_layout.addWidget(self.topbar)
+        video_layout.addWidget(self.video_frame)
+        video_layout.addWidget(controls)
+        
+        # --- Right Side: Chat ---
+        self.chat_container = QFrame()
+        self.chat_container.setObjectName("chatContainer")
+        self.chat_container.setFixedWidth(320)
+        chat_layout = QVBoxLayout(self.chat_container)
+        
+        chat_header = QLabel("Live Chat")
+        chat_header.setObjectName("chatHeader")
+        
+        self.users_lbl = QLabel("0 watching")
+        self.users_lbl.setObjectName("usersLbl")
+        
+        self.chat_messages = QTextEdit()
+        self.chat_messages.setObjectName("chatMessages")
+        self.chat_messages.setReadOnly(True)
+        self.chat_messages.setHtml("Welcome to the room! 👋")
+        
+        chat_input_layout = QHBoxLayout()
+        self.chat_input = QLineEdit()
+        self.chat_input.setPlaceholderText("Send a message...")
+        self.chat_send_btn = QPushButton("Send")
+        
+        chat_input_layout.addWidget(self.chat_input)
+        chat_input_layout.addWidget(self.chat_send_btn)
+        
+        # Chat actions
+        self.chat_send_btn.clicked.connect(self.send_chat)
+        self.chat_input.returnPressed.connect(self.send_chat)
+        
+        chat_layout.addWidget(chat_header)
+        chat_layout.addWidget(self.users_lbl)
+        chat_layout.addWidget(self.chat_messages, 1) # stretch
+        chat_layout.addLayout(chat_input_layout)
+        
+        layout.addWidget(video_container, 1) # stretch
+        layout.addWidget(self.chat_container)
+        
+        # Instantiate the VLC Player Wrapper
+        self.vlc_player = VLCSyncPlayer(self.video_frame)
+        self.vlc_player.signals.time_changed.connect(self.on_vlc_time)
+        self.vlc_player.signals.state_changed.connect(self.on_vlc_state)
+        self.vlc_player.set_volume(self.volume_slider.value())
+        
+        self.play_btn.clicked.connect(self.toggle_playback)
+
+        return widget
+
+    def toggle_fullscreen(self):
+        if self.isFullScreen():
+            self.showNormal()
+            self.fullscreen_btn.setText("⛶")
+            self.chat_container.show()
+            self.topbar.show()
+        else:
+            self.showFullScreen()
+            self.fullscreen_btn.setText("🗗")
+            self.chat_container.hide()
+            self.topbar.hide()
+
+    def toggle_playback(self):
+        position_s = self.vlc_player.current_time_ms / 1000.0
+        if self.vlc_player.is_playing:
+            self.vlc_player.pause()
+            self.play_btn.setText("▶")
+            self.sync_client.send_message({"type": "sync", "action": "pause", "position": position_s})
+        else:
+            self.vlc_player.play()
+            self.play_btn.setText("⏸")
+            self.sync_client.send_message({"type": "sync", "action": "play", "position": position_s})
+            
+    def on_vlc_time(self, time_ms: int):
+        length_ms = self.vlc_player.get_length()
+        if length_ms > 0:
+            def fmt(ms):
+                s = max(0, ms) // 1000
+                return f"{s//3600:02d}:{(s%3600)//60:02d}:{s%60:02d}"
+                
+            if not self.seekbar.isSliderDown():
+                self.time_lbl.setText(f"{fmt(time_ms)} / {fmt(length_ms)}")
+                progress = int((time_ms / length_ms) * 1000)
+                self.seekbar.blockSignals(True)
+                self.seekbar.setValue(progress)
+                self.seekbar.blockSignals(False)
+            
+        if self.last_reported_time_ms is not None:
+            diff = abs(time_ms - self.last_reported_time_ms)
+            if diff > 2500 and not self.ignore_vlc_events:
+                self.sync_client.send_message({"type": "sync", "action": "seek", "position": time_ms / 1000.0})
+        self.last_reported_time_ms = time_ms
+            
+    def on_vlc_state(self, playing: bool, time_ms: int):
+        if self.ignore_vlc_events:
+            return
+        action = "play" if playing else "pause"
+        self.sync_client.send_message({"type": "sync", "action": action, "position": time_ms / 1000.0})
+
+    def on_seekbar_dragged(self, value):
+        length_ms = self.vlc_player.get_length()
+        if length_ms > 0:
+            target_ms = int((value / 1000.0) * length_ms)
+            def fmt(ms):
+                s = max(0, ms) // 1000
+                return f"{s//3600:02d}:{(s%3600)//60:02d}:{s%60:02d}"
+            self.time_lbl.setText(f"{fmt(target_ms)} / {fmt(length_ms)}")
+
+    def on_seekbar_released(self):
+        length_ms = self.vlc_player.get_length()
+        if length_ms > 0:
+            target_ms = int((self.seekbar.value() / 1000.0) * length_ms)
+            self.vlc_player.seek(target_ms)
+            self.sync_client.send_message({"type": "sync", "action": "seek", "position": target_ms / 1000.0})
+
+    def on_volume_changed(self, value):
+        self.vlc_player.set_volume(value)
+
+    def select_file(self):
+        file_path, _ = QFileDialog.getOpenFileName(
+            self, "Select Video File", "", "Video Files (*.mp4 *.mkv *.avi *.mov *.webm);;All Files (*)"
+        )
+        if file_path:
+            self.local_file_path = file_path
+            self.local_file_name = os.path.basename(file_path)
+            self.local_file_size = os.path.getsize(file_path)
+            
+            size_mb = self.local_file_size / (1024 * 1024)
+            self.create_file_info.setText(f"{self.local_file_name}\n{size_mb:.1f} MB")
+            self.create_file_info.show()
+            self.check_inputs()
+
+    def copy_room_code(self):
+        if self.room_code:
+            QApplication.clipboard().setText(self.room_code)
+            self.copy_code_btn.setIcon(self.check_icon)
+            
+            # Show floating tooltip for feedback
+            toast = QLabel("Copied!", self)
+            toast.setStyleSheet("background-color: #4BB543; color: white; padding: 4px 8px; border-radius: 4px; font-weight: bold;")
+            toast.setWindowFlags(Qt.WindowType.ToolTip | Qt.WindowType.FramelessWindowHint)
+            
+            # Position the toast slightly below the button
+            pos = self.copy_code_btn.mapToGlobal(self.copy_code_btn.rect().bottomLeft())
+            toast.move(pos.x(), pos.y() + 5)
+            toast.show()
+            
+            def reset():
+                self.copy_code_btn.setIcon(self.copy_icon)
+                toast.deleteLater()
+                
+            QTimer.singleShot(1500, reset)
+
+    def check_inputs(self):
+        has_name = len(self.username_input.text().strip()) > 0
+        has_file = self.local_file_path is not None
+        has_code = len(self.room_code_input.text().strip()) >= 4
+        
+        self.create_room_btn.setEnabled(has_name and has_file)
+        self.join_room_btn.setEnabled(has_name and has_code)
+
+    def create_room(self):
+        self.username = self.username_input.text().strip()
+        self.create_room_btn.setText("Connecting...")
+        self.create_room_btn.setEnabled(False)
+        self.join_room_btn.setEnabled(False)
+        
+        self.pending_connect_action = lambda: self.sync_client.send_message({
+            "type": "create_room",
+            "username": self.username,
+            "fileInfo": {
+                "name": self.local_file_name,
+                "size": self.local_file_size,
+                "duration": 0
+            }
+        })
+        
+        if self.sync_client.running and self.sync_client.ws:
+            self.on_ws_connected()
+        else:
+            self.sync_client.start()
+
+    def join_room(self):
+        self.username = self.username_input.text().strip()
+        self.room_code = self.room_code_input.text().strip().upper()
+        self.join_room_btn.setText("Connecting...")
+        self.join_room_btn.setEnabled(False)
+        self.create_room_btn.setEnabled(False)
+        
+        self.pending_connect_action = lambda: self.sync_client.send_message({
+            "type": "join_room",
+            "username": self.username,
+            "code": self.room_code
+        })
+        
+        if self.sync_client.running and self.sync_client.ws:
+            self.on_ws_connected()
+        else:
+            self.sync_client.start()
+
+    def leave_room(self):
+        self.vlc_player.stop()
+        self.sync_client.stop()
+        self.stacked_widget.setCurrentIndex(0)
+        self.local_file_path = None
+        self.create_file_info.hide()
+        self.room_code = ""
+        self.check_inputs()
+        self.create_room_btn.setText("Create Room")
+        self.join_room_btn.setText("Join Room")
+
+    # --- WebSocket Callbacks ---
+    def on_ws_connected(self):
+        if self.pending_connect_action:
+            self.pending_connect_action()
+            self.pending_connect_action = None
+
+    def on_room_error(self, msg: str):
+        QMessageBox.critical(self, "Room Error", msg)
+        self.create_room_btn.setText("Create Room")
+        self.join_room_btn.setText("Join Room")
+        self.check_inputs()
+        self.sync_client.stop()
+
+    def on_file_check_needed(self, msg: dict):
+        # Defer execution to the PyQt Main Thread to avoid deadlocking the WebSocket thread
+        QTimer.singleShot(0, lambda: self._handle_file_check(msg))
+
+    def _handle_file_check(self, msg: dict):
+        req_name = msg["fileInfo"].get("name", "Unknown")
+        req_size = msg["fileInfo"].get("size", 0)
+        
+        QMessageBox.information(self, "File Required", f"To join this room, you need to select:\\n\\nName: {req_name}\\nSize: {req_size / (1024*1024):.1f} MB")
+        
+        file_path, _ = QFileDialog.getOpenFileName(
+            self, f"Select {req_name}", "", f"Required File ({req_name})"
+        )
+        
+        if file_path:
+            self.local_file_path = file_path
+            self.local_file_name = os.path.basename(file_path)
+            self.local_file_size = os.path.getsize(file_path)
+            
+            if self.local_file_name == req_name and self.local_file_size == req_size:
+                self.sync_client.send_message({
+                    "type": "confirm_join",
+                    "fileInfo": {
+                        "name": self.local_file_name,
+                        "size": self.local_file_size,
+                        "duration": 0
+                    }
+                })
+            else:
+                QMessageBox.critical(self, "File Mismatch", "The selected file does not exactly match the room's required file.")
+                self.sync_client.stop()
+                self.join_room_btn.setText("Join Room")
+                self.check_inputs()
+        else:
+            self.sync_client.stop()
+            self.join_room_btn.setText("Join Room")
+            self.check_inputs()
+
+    def on_room_joined(self, msg: dict):
+        if "room" in msg:
+            self.room_code = msg["room"]["code"]
+        else:
+            self.room_code = msg.get("code", "")
+            
+        self.stacked_widget.setCurrentIndex(1)
+        self.room_code_display.setText(f"Room: {self.room_code}")
+        self.room_file_badge.setText(f"📄 {self.local_file_name}")
+        self.create_room_btn.setText("Create Room")
+        self.join_room_btn.setText("Join Room")
+        self.chat_messages.setHtml("Welcome to the room! 👋")
+        
+        if self.local_file_path:
+            self.vlc_player.load_media(self.local_file_path)
+            self.vlc_player.set_volume(self.volume_slider.value())
+            
+        users = msg.get("users", [])
+        if users:
+            self.on_users_updated(users)
+            
+        state = msg.get("state", {})
+        if state:
+            self.on_sync_event(state)
+            
+        chat_history = msg.get("chatHistory", [])
+        if chat_history:
+            self.chat_messages.setHtml("Welcome to the room! 👋")
+            for chat in chat_history:
+                self.on_chat_message(chat.get("username", "Unknown"), chat.get("message", ""), chat.get("timestamp", 0))
+
+    def on_chat_message(self, author: str, text: str, timestamp: int):
+        try:
+            dt = datetime.datetime.fromtimestamp(timestamp / 1000.0)
+        except (ValueError, OSError, TypeError):
+            dt = datetime.datetime.now()
+            
+        time_str = dt.strftime("%I:%M %p")
+        
+        new_msg = f"<b>{author}</b>: {text} <span style='color: gray; font-size: 10px;'>{time_str}</span>"
+        self.chat_messages.append(new_msg)
+        
+    def on_system_message(self, text: str):
+        new_msg = f"<i style='color: #888;'>{text}</i>"
+        self.chat_messages.append(new_msg)
+        
+    def on_users_updated(self, users: list):
+        self.users_lbl.setText(f"{len(users)} watching: {', '.join(users)}")
+        
+    def on_sync_event(self, msg: dict):
+        self.ignore_vlc_events = True
+        
+        action = msg.get("action")
+        # Handle full state sync vs event sync
+        if not action:
+            if msg.get("playing", False):
+                action = "play"
+            elif msg.get("playing") is False:
+                action = "pause"
+                
+        position_s = msg.get("position", 0)
+        position_ms = int(position_s * 1000)
+        
+        if action == "play":
+            self.vlc_player.seek(position_ms)
+            self.vlc_player.play()
+            self.play_btn.setText("⏸")
+        elif action == "pause":
+            self.vlc_player.seek(position_ms)
+            self.vlc_player.pause()
+            self.play_btn.setText("▶")
+        elif action == "seek":
+            self.vlc_player.seek(position_ms)
+            
+        def clear_ignore():
+            self.ignore_vlc_events = False
+        QTimer.singleShot(1500, clear_ignore)
+        
+        # System notification
+        username = msg.get("username")
+        if username and username != self.username:
+            if action == "play":
+                self.on_system_message(f"{username} pressed play")
+            elif action == "pause":
+                self.on_system_message(f"{username} paused")
+            elif action == "seek":
+                def fmt(s): return f"{int(s)//3600:02d}:{(int(s)%3600)//60:02d}:{int(s)%60:02d}"
+                self.on_system_message(f"{username} seeked to {fmt(position_s)}")
+
+    def _handle_seek_command(self, arg: str) -> bool:
+        current_ms = self.vlc_player.current_time_ms
+        length_ms = self.vlc_player.get_length()
+        if length_ms <= 0:
+            return False
+            
+        try:
+            target_ms = 0
+            if arg.startswith('+') or arg.startswith('-'):
+                # relative
+                modifier = 1 if arg.startswith('+') else -1
+                num_str = arg[1:]
+                
+                if num_str.endswith('s'):
+                    val = float(num_str[:-1]) * 1000
+                elif num_str.endswith('m'):
+                    val = float(num_str[:-1]) * 60 * 1000
+                elif num_str.endswith('h'):
+                    val = float(num_str[:-1]) * 3600 * 1000
+                else:
+                    val = float(num_str) * 1000  # Default to seconds
+                    
+                target_ms = current_ms + (val * modifier)
+            elif ":" in arg:
+                # absolute time like HH:MM:SS or MM:SS
+                parts = arg.split(":")
+                parts.reverse() # seconds, minutes, hours
+                if len(parts) > 0: target_ms += float(parts[0]) * 1000
+                if len(parts) > 1: target_ms += float(parts[1]) * 60 * 1000
+                if len(parts) > 2: target_ms += float(parts[2]) * 3600 * 1000
+            else:
+                # absolute seconds or something with a suffix but no + or -
+                if arg.endswith('s'):
+                    target_ms = float(arg[:-1]) * 1000
+                elif arg.endswith('m'):
+                    target_ms = float(arg[:-1]) * 60 * 1000
+                elif arg.endswith('h'):
+                    target_ms = float(arg[:-1]) * 3600 * 1000
+                else:
+                    target_ms = float(arg) * 1000
+                
+            target_ms = max(0, min(target_ms, length_ms))
+            self.vlc_player.seek(int(target_ms))
+            self.sync_client.send_message({"type": "sync", "action": "seek", "position": target_ms / 1000.0})
+            return True
+        except ValueError:
+            return False
+
+    def send_chat(self):
+        text = self.chat_input.text().strip()
+        if not text:
+            return
+
+        if text.startswith("/"):
+            parts = text.split()
+            cmd = parts[0].lower()
+            
+            if cmd == "/play":
+                self.chat_input.setText("")
+                if not self.vlc_player.is_playing:
+                    self.toggle_playback()
+                self.on_system_message(text)
+                return
+            elif cmd == "/pause":
+                self.chat_input.setText("")
+                if self.vlc_player.is_playing:
+                    self.toggle_playback()
+                self.on_system_message(text)
+                return
+            elif cmd == "/seek":
+                self.chat_input.setText("")
+                if len(parts) > 1:
+                    if self._handle_seek_command(parts[1]):
+                        self.on_system_message(text)
+                    else:
+                        self.on_system_message("Invalid time format. Use: 1:23, +30s, -1m")
+                else:
+                    self.on_system_message("Usage: /seek [time]")
+                return
+            elif cmd == "/help":
+                self.chat_input.setText("")
+                self.on_system_message("Available commands:<br><b>/play</b> - Resume playback<br><b>/pause</b> - Pause playback<br><b>/seek [time]</b> - Seek to specific time (e.g., 1:23) or offset (e.g., +30s, -1m)<br><b>/help</b> - Show this message")
+                return
+
+        self.sync_client.send_message({"type": "chat", "message": text})
+        self.chat_input.setText("")
+
+    def apply_stylesheet(self):
+        self.setStyleSheet("""
+            QWidget {
+                background-color: #0f0f0f;
+                color: #f1f1f1;
+                font-family: 'Segoe UI', 'Roboto', sans-serif;
+                font-size: 14px;
+            }
+            
+            #lobbyCard {
+                background-color: #1a1a1a;
+                border: 1px solid #333;
+                border-radius: 12px;
+            }
+            
+            #brandTitle {
+                font-size: 32px;
+                font-weight: bold;
+                color: #3ea6ff;
+            }
+            
+            #brandTagline {
+                font-size: 14px;
+                color: #aaaaaa;
+            }
+            
+            QLabel {
+                color: #aaaaaa;
+                font-weight: bold;
+                font-size: 12px;
+                background-color: transparent;
+            }
+            
+            #fileInfo {
+                background-color: rgba(62, 166, 255, 0.1);
+                color: #3ea6ff;
+                padding: 10px;
+                border-radius: 6px;
+                font-weight: normal;
+                font-size: 13px;
+            }
+            
+            QLineEdit {
+                background-color: #272727;
+                border: 1px solid #333;
+                border-radius: 6px;
+                padding: 10px;
+                color: white;
+                font-size: 14px;
+            }
+            
+            QLineEdit:focus {
+                border: 1px solid #3ea6ff;
+            }
+            
+            QPushButton {
+                border-radius: 6px;
+                padding: 10px 16px;
+                font-weight: bold;
+                font-size: 14px;
+                background-color: #272727;
+                color: white;
+                border: 1px solid #444;
+            }
+            QPushButton:hover {
+                background-color: #333;
+            }
+            QPushButton:disabled {
+                border-color: #222;
+                color: #666;
+            }
+            
+            #primaryBtn {
+                background-color: #3ea6ff;
+                color: black;
+                border: none;
+            }
+            #primaryBtn:hover {
+                background-color: #65b8ff;
+            }
+            #primaryBtn:disabled {
+                background-color: #333;
+                color: #666;
+            }
+            
+            #iconBtn {
+                background-color: transparent;
+                border: none;
+                padding: 5px;
+            }
+            #iconBtn:hover {
+                background-color: rgba(255, 255, 255, 0.1);
+            }
+            
+            #dangerBtn {
+                background-color: transparent;
+                color: #ff4e45;
+                border: 1px solid #ff4e45;
+                padding: 6px 12px;
+                font-size: 12px;
+            }
+            #dangerBtn:hover {
+                background-color: #ff4e45;
+                color: white;
+            }
+            
+            #divider {
+                color: #555;
+            }
+            
+            #topbar {
+                background-color: #1a1a1a;
+                border-bottom: 1px solid #333;
+            }
+            
+            #fileBadge {
+                background-color: #272727;
+                padding: 4px 10px;
+                border-radius: 12px;
+                font-size: 12px;
+                font-weight: normal;
+            }
+            
+            #controlsBar {
+                background-color: #1a1a1a;
+            } #playBtn {
+                background: transparent;
+                color: white;
+                font-size: 20px;
+                border: none;
+            } #playBtn:hover {
+                background: #333;
+            }
+            
+            #chatContainer {
+                background-color: #111;
+                border-left: 1px solid #333;
+            }
+            
+            #chatHeader {
+                font-size: 16px;
+                color: white;
+                padding: 10px 0;
+            }
+            
+            #usersLbl {
+                color: #3ea6ff;
+                font-size: 12px;
+            }
+            
+            #chatMessages {
+                background-color: transparent;
+                border: none;
+                color: #f1f1f1;
+            }
+            
+            #chatMessages QScrollBar:vertical {
+                border: none;
+                background: transparent;
+                width: 8px;
+                margin: 0px;
+            }
+            #chatMessages QScrollBar::handle:vertical {
+                background: #555;
+                min-height: 20px;
+                border-radius: 4px;
+            }
+            #chatMessages QScrollBar::handle:vertical:hover {
+                background: #666;
+            }
+            #chatMessages QScrollBar::add-line:vertical, #chatMessages QScrollBar::sub-line:vertical {
+                height: 0px;
+            }
+            #chatMessages QScrollBar::add-page:vertical, #chatMessages QScrollBar::sub-page:vertical {
+                background: none;
+            }
+        """)
+
+if __name__ == "__main__":
+    # Tell Windows this is a distinct app so the taskbar icon updates correctly
+    if os.name == 'nt':
+        myappid = 'vlcsync.desktopclient.app.1' 
+        try:
+            ctypes.windll.shell32.SetCurrentProcessExplicitAppUserModelID(myappid)
+        except Exception:
+            pass
+
+    app = QApplication(sys.argv)
+    
+    # Set app-level icon
+    icon_path = os.path.join(os.path.dirname(__file__), "icon.png")
+    if os.path.exists(icon_path):
+        app.setWindowIcon(QIcon(icon_path))
+        
+    window = VlcSyncApp()
+    window.show()
+    sys.exit(app.exec())

desktop-client/pyproject.toml

@@ -0,0 +1,13 @@
+[project]
+name = "python-app"
+version = "0.1.0"
+description = "Add your description here"
+readme = "README.md"
+requires-python = ">=3.14"
+dependencies = [
+    "pillow>=12.1.1",
+    "pyinstaller>=6.19.0",
+    "pyqt6>=6.10.2",
+    "python-vlc>=3.0.21203",
+    "websockets>=16.0",
+]

desktop-client/sync_client.py

@@ -0,0 +1,91 @@
+import asyncio
+import json
+import websockets
+from PyQt6.QtCore import QThread, pyqtSignal
+
+class SyncClientThread(QThread):
+    # Signals from WebSocket -> PyQt UI
+    connected = pyqtSignal()
+    disconnected = pyqtSignal()
+    room_joined = pyqtSignal(dict)
+    room_error = pyqtSignal(str)
+    file_check_needed = pyqtSignal(dict) # msg
+    users_updated = pyqtSignal(list)
+    chat_message = pyqtSignal(str, str, int) # author, text, timestamp
+    system_message = pyqtSignal(str)
+    sync_event = pyqtSignal(dict)
+
+    def __init__(self, url="ws://localhost:3000/ws"):
+        super().__init__()
+        self.url = url
+        self.ws = None
+        self.loop = None
+        self.running = False
+
+    def run(self):
+        """Runs strictly within the newly created QThread"""
+        self.running = True
+        self.loop = asyncio.new_event_loop()
+        asyncio.set_event_loop(self.loop)
+        self.loop.run_until_complete(self._connect_and_listen())
+        self.loop.close()
+
+    def stop(self):
+        self.running = False
+        if self.ws and self.loop:
+            asyncio.run_coroutine_threadsafe(self.ws.close(), self.loop)
+        self.quit()
+        self.wait()
+
+    def send_message(self, message: dict):
+        """Called safely from the main PyQt thread to send data out"""
+        if self.ws and self.loop:
+            json_str = json.dumps(message)
+            asyncio.run_coroutine_threadsafe(self.ws.send(json_str), self.loop)
+
+    async def _connect_and_listen(self):
+        while self.running:
+            try:
+                async with websockets.connect(self.url) as ws:
+                    self.ws = ws
+                    self.connected.emit()
+                    
+                    try:
+                        async for message in ws:
+                            if not self.running:
+                                break
+                            self._handle_message(json.loads(message))
+                    except websockets.ConnectionClosed:
+                        pass
+                        
+            except Exception as e:
+                print(f"WebSocket Error: {e}")
+                
+            self.disconnected.emit()
+            if self.running:
+                # Reconnect backoff
+                await asyncio.sleep(2)
+
+    def _handle_message(self, msg: dict):
+        t = msg.get("type")
+        
+        if t == "room_created":
+            self.room_joined.emit(msg)
+            
+        elif t == "room_joined" or t == "room_rejoined":
+            self.room_joined.emit(msg)
+            
+        elif t == "error":
+            self.room_error.emit(msg.get("message", "Unknown error"))
+            
+        elif t == "room_file_check":
+            self.file_check_needed.emit(msg)
+            
+        elif t in ["user_joined", "user_left"]:
+            self.users_updated.emit(msg.get("users", []))
+            
+        elif t == "chat":
+            self.chat_message.emit(msg.get("username", "Unknown"), msg.get("message", ""), msg.get("timestamp", 0))
+            
+        elif t == "sync":
+            self.sync_event.emit(msg)

desktop-client/test_app.py

@@ -0,0 +1,60 @@
+import pytest
+from PyQt6.QtCore import Qt
+from main import VlcSyncApp
+
+def test_app_ui_flow(qtbot):
+    # Initialize the main application
+    app = VlcSyncApp()
+    qtbot.addWidget(app)
+    
+    # 1. Test Lobby View
+    assert app.stacked_widget.currentIndex() == 0
+    assert not app.create_room_btn.isEnabled()
+    
+    # Fill out the Lobby Form
+    app.username_input.setText("PyTestUser")
+    
+    # Mocking file selection instead of opening the native dialog
+    app.local_file_path = "test_pytest.mkv"
+    app.local_file_name = "test_pytest.mkv"
+    app.local_file_size = 1048576
+    app.check_inputs()
+    
+    # Button should now be active
+    assert app.create_room_btn.isEnabled()
+    
+    # 2. Test Creating Room matches integration pipeline
+    qtbot.mouseClick(app.create_room_btn, Qt.MouseButton.LeftButton)
+    
+    # Wait for the WebSocket connected signal, the room_created server response, and UI transition
+    def check_room_joined():
+        assert app.stacked_widget.currentIndex() == 1
+        assert len(app.room_code) > 2
+        
+    qtbot.waitUntil(check_room_joined, timeout=5000)
+    
+    # 3. Test Chat flow End-to-End
+    # Type a message
+    qtbot.keyClicks(app.chat_input, "Automated UI Test Message")
+    # Click Send
+    qtbot.mouseClick(app.chat_send_btn, Qt.MouseButton.LeftButton)
+    
+    # Wait until the Bun server grabs the websocket payload, stores it, and broadcasts it back to the UI!
+    def check_chat_received():
+        assert "Automated UI Test Message" in app.chat_messages.text()
+        
+    qtbot.waitUntil(check_chat_received, timeout=3000)
+    
+    # 4. Test Playback Sync (UI updates and internal flags)
+    assert app.play_btn.text() == "▶"
+    
+    # Click Play
+    qtbot.mouseClick(app.play_btn, Qt.MouseButton.LeftButton)
+    
+    def check_playback_started():
+        assert app.play_btn.text() == "⏸"
+        
+    qtbot.waitUntil(check_playback_started, timeout=2000)
+    
+    # Clean up background threads
+    app.leave_room()

desktop-client/test_integration.py

@@ -0,0 +1,145 @@
+import asyncio
+import json
+import websockets
+import sys
+
+async def run_integration_test():
+    url = "wss://video-sync.peterstockings.com/ws"
+    
+    print("🤖 Test: Starting Integration Test Suite...")
+    
+    # Client 1: Creator
+    try:
+        creator_ws = await websockets.connect(url)
+        print("✅ Creator connected to WebSocket")
+    except Exception as e:
+        print(f"❌ Failed to connect to server: {e}")
+        sys.exit(1)
+        
+    creator_msg = {
+        "type": "create_room",
+        "username": "TestCreator",
+        "fileInfo": {
+            "name": "test_video.mkv",
+            "size": 1048576, # 1MB
+            "duration": 0
+        }
+    }
+    await creator_ws.send(json.dumps(creator_msg))
+    print("📤 Creator sent 'create_room'")
+    
+    room_code = None
+    
+    # Wait for room_created
+    try:
+        response_str = await asyncio.wait_for(creator_ws.recv(), timeout=2.0)
+        response = json.loads(response_str)
+        if response.get("type") == "room_created":
+            room_code = response.get("code")
+            print(f"✅ Creator received room_created with code: {room_code}")
+        else:
+            print(f"❌ Unexpected response for creator: {response}")
+            sys.exit(1)
+    except asyncio.TimeoutError:
+        print("❌ Timeout waiting for 'room_created'")
+        sys.exit(1)
+        
+    # Client 2: Joiner
+    try:
+        joiner_ws = await websockets.connect(url)
+        print("✅ Joiner connected to WebSocket")
+    except Exception as e:
+        print(f"❌ Joiner failed to connect to server: {e}")
+        sys.exit(1)
+        
+    joiner_msg = {
+        "type": "join_room",
+        "username": "TestJoiner",
+        "code": room_code
+    }
+    
+    await joiner_ws.send(json.dumps(joiner_msg))
+    print(f"📤 Joiner sent 'join_room' for code: {room_code}")
+    
+    # Wait for file_check needed
+    try:
+        response_str = await asyncio.wait_for(joiner_ws.recv(), timeout=2.0)
+        response = json.loads(response_str)
+        if response.get("type") == "room_file_check":
+            print(f"✅ Joiner received room_file_check from server. Payload: {response}")
+            
+            # Send file confirmation
+            confirm_msg = {
+                "type": "confirm_join",
+                "fileInfo": {
+                    "name": "test_video.mkv",
+                    "size": 1048576,
+                    "duration": 0
+                }
+            }
+            await joiner_ws.send(json.dumps(confirm_msg))
+            print("📤 Joiner sent 'confirm_join'")
+            
+            # Wait for successful room_joined
+            response_str = await asyncio.wait_for(joiner_ws.recv(), timeout=2.0)
+            response = json.loads(response_str)
+            if response.get("type") == "room_joined":
+                print(f"✅ Joiner successfully received room_joined: {list(response.keys())}")
+                
+                # Check users payload from the join response itself
+                users = response.get("users", [])
+                print(f"✅ Joiner received user list from room_joined payload: {users}")
+                assert len(users) == 2, "Expected 2 users in the room!"
+                    
+                # Setup wait task for the Joiner to receive a Play sync event
+                print("⏳ Creator is sending a Play sync event...")
+                await creator_ws.send(json.dumps({
+                    "type": "sync",
+                    "action": "play",
+                    "position": 5.0
+                }))
+                
+                # Creator will get an echo, Joiner will get the broadcast
+                creator_echo = json.loads(await asyncio.wait_for(creator_ws.recv(), timeout=2.0))
+                joiner_sync = json.loads(await asyncio.wait_for(joiner_ws.recv(), timeout=2.0))
+                
+                if joiner_sync.get("type") == "sync":
+                    print(f"✅ Joiner received sync event: {joiner_sync}")
+                    assert joiner_sync.get("action") == "play", "Expected 'play' sync event"
+                    assert joiner_sync.get("position") == 5.0, "Expected position 5.0"
+                else:
+                    print(f"❌ Joiner expected sync, got: {joiner_sync}")
+                    sys.exit(1)
+                    
+                # Setup wait task for the Joiner to send a Chat message
+                print("⏳ Joiner is sending a Chat message...")
+                await joiner_ws.send(json.dumps({
+                    "type": "chat",
+                    "message": "Hello from integration test!"
+                }))
+                
+                creator_chat = json.loads(await asyncio.wait_for(creator_ws.recv(), timeout=2.0))
+                joiner_chat = json.loads(await asyncio.wait_for(joiner_ws.recv(), timeout=2.0))
+                
+                if creator_chat.get("type") == "chat":
+                    print(f"✅ Creator received chat event: {creator_chat}")
+                    assert creator_chat.get("username") == "TestJoiner", "Expected TestJoiner author"
+                    assert creator_chat.get("message") == "Hello from integration test!", "Expected correct message"
+                else:
+                    print(f"❌ Creator expected chat, got: {creator_chat}")
+                    sys.exit(1)
+                    
+            else:
+                print(f"❌ Joiner expected room_joined, got: {response}")
+        else:
+            print(f"❌ Joiner expected room_file_check, got: {response}")
+    except asyncio.TimeoutError:
+        print("❌ Timeout waiting for server response to 'join_room'")
+        sys.exit(1)
+        
+    await creator_ws.close()
+    await joiner_ws.close()
+    print("🎉 Integration test completed successfully!")
+
+if __name__ == "__main__":
+    asyncio.run(run_integration_test())

desktop-client/uv.lock

@@ -0,0 +1,234 @@
+version = 1
+revision = 3
+requires-python = ">=3.14"
+
+[[package]]
+name = "altgraph"
+version = "0.17.5"
+source = { registry = "https://pypi.org/simple" }
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+    { url = "https://files.pythonhosted.org/packages/6f/28/258ebab549c2bf3e64d2b0217b973467394a9cea8c42f70418ca2c5d0d2e/websockets-16.0-py3-none-any.whl", hash = "sha256:1637db62fad1dc833276dded54215f2c7fa46912301a24bd94d45d46a011ceec", size = 171598, upload-time = "2026-01-10T09:23:45.395Z" },
+]

desktop-client/vlc_player.py

@@ -0,0 +1,107 @@
+import vlc
+import sys
+from PyQt6.QtWidgets import QFrame
+from PyQt6.QtCore import Qt, pyqtSignal, QObject
+import threading
+
+class VLCSignals(QObject):
+    state_changed = pyqtSignal(bool, int) # is_playing, time_ms
+    time_changed = pyqtSignal(int)        # time_ms
+
+class VLCSyncPlayer:
+    def __init__(self, frame: QFrame):
+        self.frame = frame
+        self.signals = VLCSignals()
+        
+        # Initialize VLC instance
+        # --no-xlib prevents crashes on Linux
+        # --drop-late-frames improves sync by not delaying playback when CPU is slow
+        self.instance = vlc.Instance("--no-xlib", "--drop-late-frames")
+        self.media_player = self.instance.media_player_new()
+        
+        # Embed the VLC player into the provided PyQt QFrame
+        # On Windows, PyQt6 widgets don't have a native handle by default
+        self.frame.setAttribute(Qt.WidgetAttribute.WA_NativeWindow)
+        
+        if sys.platform.startswith('linux'):
+            self.media_player.set_xwindow(int(self.frame.winId()))
+        elif sys.platform == "win32":
+            # For Windows, we must explicitly cast winId() to int
+            self.media_player.set_hwnd(int(self.frame.winId()))
+        elif sys.platform == "darwin":
+            self.media_player.set_nsobject(int(self.frame.winId()))
+            
+        # Register Event Callbacks
+        self.events = self.media_player.event_manager()
+        self.events.event_attach(vlc.EventType.MediaPlayerPlaying, self._on_playing)
+        self.events.event_attach(vlc.EventType.MediaPlayerPaused, self._on_paused)
+        self.events.event_attach(vlc.EventType.MediaPlayerTimeChanged, self._on_time_changed)
+        
+        # Local State
+        self.is_playing = False
+        self.current_time_ms = 0
+        self.ignore_next_event = False
+        self.lock = threading.Lock()
+
+    def load_media(self, path: str):
+        media = self.instance.media_new(path)
+        self.media_player.set_media(media)
+
+    def play(self):
+        with self.lock:
+            self.ignore_next_event = True
+        self.media_player.play()
+
+    def pause(self):
+        with self.lock:
+            self.ignore_next_event = True
+        self.media_player.set_pause(1)
+
+    def seek(self, position_ms: int):
+        with self.lock:
+            self.ignore_next_event = True
+        self.media_player.set_time(position_ms)
+
+    def set_volume(self, volume: int):
+        self.media_player.audio_set_volume(volume)
+        
+    def get_volume(self) -> int:
+        return self.media_player.audio_get_volume()
+
+    # --- Internal VLC Callbacks ---
+    
+    @vlc.callbackmethod
+    def _on_playing(self, event):
+        self.is_playing = True
+        with self.lock:
+            if self.ignore_next_event:
+                self.ignore_next_event = False
+                return
+        
+        time_ms = self.media_player.get_time()
+        # Fire signal to PyQt thread
+        self.signals.state_changed.emit(True, time_ms)
+
+    @vlc.callbackmethod
+    def _on_paused(self, event):
+        self.is_playing = False
+        with self.lock:
+            if self.ignore_next_event:
+                self.ignore_next_event = False
+                return
+            
+        time_ms = self.media_player.get_time()
+        self.signals.state_changed.emit(False, time_ms)
+
+    @vlc.callbackmethod
+    def _on_time_changed(self, event):
+        # Emitted constantly during playback
+        self.current_time_ms = event.u.new_time
+        # We also want to fire this signal so the UI scrubber/time label can update
+        self.signals.time_changed.emit(self.current_time_ms)
+        
+    def get_length(self):
+        return self.media_player.get_length()
+
+    def stop(self):
+        self.media_player.stop()

public/app.js

@@ -10,8 +10,6 @@
   let joinFile = null;  // File object for the joiner
   let ignoreSync = false; // flag to avoid feedback loops
   let syncTimeout = null;
-  let driftInterval = null;
-  let serverState = { playing: false, position: 0, speed: 1 };
 
   // Reconnection state
   let reconnectAttempts = 0;
@@ -73,7 +71,6 @@
   const volumeSlider = $("volume-slider");
   const currentTimeEl = $("current-time");
   const durationEl = $("duration");
-  const speedSelect = $("speed-select");
   const fullscreenBtn = $("fullscreen-btn");
   const userCountEl = $("user-count");
   const usersList = $("users-list");
@@ -243,7 +240,6 @@
           applySync(msg.state);
         }
         addSystemMessage("Reconnected");
-        startDriftCorrection();
         flushMessageQueue();
         break;
 
@@ -298,82 +294,22 @@
     // Load local file into video player
     const file = localFile || joinFile;
     if (file) {
-      loadVideoSource(file);
+      if (currentBlobUrl) URL.revokeObjectURL(currentBlobUrl);
+      currentBlobUrl = URL.createObjectURL(file);
+      videoPlayer.src = currentBlobUrl;
     }
 
-    // --- Handle false "ended" events (Chromium MKV blob bug) ---
-    // Chrome can't properly index MKV containers loaded via blob URLs.
-    // After ~30s it may jump to the end and fire "ended" even though
-    // the video isn't actually over. Recovery: reload the blob and seek.
-    let recoveryAttempts = 0;
-    const MAX_RECOVERY_ATTEMPTS = 5;
-
-    videoPlayer.addEventListener("ended", () => {
-      const duration = videoPlayer.duration || 0;
-      // Only attempt recovery if we have server state showing we're not near the end
-      if (duration > 0 && lastServerState.position < duration - 5 && recoveryAttempts < MAX_RECOVERY_ATTEMPTS) {
-        recoveryAttempts++;
-        console.log(`[MKV-RECOVERY] False ended detected. Server pos=${lastServerState.position.toFixed(1)}, duration=${duration.toFixed(1)}. Reloading source (attempt ${recoveryAttempts}/${MAX_RECOVERY_ATTEMPTS})`);
-        
-        const targetPos = lastServerState.position;
-        const wasPlaying = lastServerState.playing;
-        const currentFile = localFile || joinFile;
-        
-        if (currentFile) {
-          // Reload the video with a fresh blob URL
-          loadVideoSource(currentFile, targetPos, wasPlaying);
-        }
-      }
-    });
-
-    // Reset recovery counter when video plays successfully for a while
-    let recoveryResetTimer = null;
-    videoPlayer.addEventListener("timeupdate", () => {
-      if (recoveryAttempts > 0) {
-        clearTimeout(recoveryResetTimer);
-        recoveryResetTimer = setTimeout(() => {
-          recoveryAttempts = 0;
-        }, 10000); // Reset after 10s of successful playback
-      }
-    });
-
     // --- Resync on tab focus (handles background tab throttling) ---
     document.addEventListener("visibilitychange", () => {
       if (!document.hidden && roomCode && ws && ws.readyState === WebSocket.OPEN) {
-        console.log("[SYNC] Tab became visible, requesting state resync");
         send({ type: "request_state" });
       }
     });
-
-    // Start drift correction
-    startDriftCorrection();
   }
 
-  // --- Video Source Loading ---
+  // --- State tracking ---
   let currentBlobUrl = null;
-  let lastServerState = { playing: false, position: 0, speed: 1 };
-
-  function loadVideoSource(file, seekTo, shouldPlay) {
-    // Revoke old blob URL to free memory
-    if (currentBlobUrl) {
-      URL.revokeObjectURL(currentBlobUrl);
-    }
-    currentBlobUrl = URL.createObjectURL(file);
-    videoPlayer.src = currentBlobUrl;
-
-    if (seekTo !== undefined) {
-      videoPlayer.addEventListener("loadedmetadata", function onMeta() {
-        videoPlayer.removeEventListener("loadedmetadata", onMeta);
-        videoPlayer.currentTime = seekTo;
-        if (shouldPlay) {
-          videoPlayer.play().then(() => {
-            videoWrapper.classList.add("playing");
-            updatePlayPauseIcon();
-          }).catch(() => {});
-        }
-      });
-    }
-  }
+  let lastServerState = { playing: false, position: 0 };
 
   // --- File Check Modal ---
   let pendingRoomFileInfo = null;
@@ -459,12 +395,7 @@
     // Track latest server state for recovery
     if (data.position !== undefined) lastServerState.position = data.position;
     if (data.playing !== undefined) lastServerState.playing = data.playing;
-    if (data.speed !== undefined) lastServerState.speed = data.speed;
 
-    if (data.speed !== undefined && videoPlayer.playbackRate !== data.speed) {
-      videoPlayer.playbackRate = data.speed;
-      speedSelect.value = String(data.speed);
-    }
 
     if (data.position !== undefined) {
       const diff = Math.abs(videoPlayer.currentTime - data.position);
@@ -510,14 +441,7 @@
     }
   }
 
-  function startDriftCorrection() {
-    if (driftInterval) clearInterval(driftInterval);
-    driftInterval = setInterval(() => {
-      if (ws && ws.readyState === WebSocket.OPEN) {
-        send({ type: "request_state" });
-      }
-    }, 5000);
-  }
+
 
   // --- Get video duration from a file (used for file info) ---
   function getVideoDuration(file) {
@@ -544,6 +468,17 @@
     container.classList.remove("hidden");
   }
 
+  function isMkvFile(file) {
+    return file.name.toLowerCase().endsWith(".mkv");
+  }
+
+  function showFormatWarning(container) {
+    const warning = document.createElement("div");
+    warning.className = "format-warning";
+    warning.innerHTML = `⚠️ <strong>MKV files may not play correctly</strong> in browsers. Convert to MP4 for best results:<br><code>ffmpeg -i file.mkv -c copy file.mp4</code>`;
+    container.parentNode.insertBefore(warning, container.nextSibling);
+  }
+
   // ===== EVENT LISTENERS =====
 
   // --- Lobby: Username ---
@@ -560,7 +495,11 @@
     localFile = file;
     const duration = await getVideoDuration(file);
     localFile._duration = duration;
+    // Remove any previous format warning
+    const oldWarning = createFileInfo.parentNode.querySelector(".format-warning");
+    if (oldWarning) oldWarning.remove();
     renderFileInfo(createFileInfo, file, duration);
+    if (isMkvFile(file)) showFormatWarning(createFileInfo);
     createRoomBtn.disabled = !usernameInput.value.trim();
   });
 
@@ -679,7 +618,6 @@
     joinFile = null;
     roomFileInfo = null;
     messageQueue = [];
-    if (driftInterval) clearInterval(driftInterval);
     videoPlayer.src = "";
     chatMessages.innerHTML = '<div class="chat-welcome" id="chat-welcome"><p>Welcome to the room! 👋</p></div>';
     createFileInfo.classList.add("hidden");
@@ -766,12 +704,6 @@
     volOffIcon.classList.toggle("hidden", !videoPlayer.muted);
   });
 
-  // Speed
-  speedSelect.addEventListener("change", () => {
-    const speed = parseFloat(speedSelect.value);
-    videoPlayer.playbackRate = speed;
-    send({ type: "sync", action: "speed", speed });
-  });
 
   // Fullscreen
   fullscreenBtn.addEventListener("click", () => {

public/index.html

@@ -158,15 +158,6 @@
                 </span>
               </div>
               <div class="controls-right">
-                <select id="speed-select" class="speed-select" title="Playback speed">
-                  <option value="0.25">0.25x</option>
-                  <option value="0.5">0.5x</option>
-                  <option value="0.75">0.75x</option>
-                  <option value="1" selected>1x</option>
-                  <option value="1.25">1.25x</option>
-                  <option value="1.5">1.5x</option>
-                  <option value="2">2x</option>
-                </select>
                 <button id="fullscreen-btn" class="ctrl-btn" title="Fullscreen">
                   <svg viewBox="0 0 24 24" width="22" height="22" fill="white">
                     <path d="M7 14H5v5h5v-2H7v-3zm-2-4h2V7h3V5H5v5zm12 7h-3v2h5v-5h-2v3zM14 5v2h3v3h2V5h-5z" />

public/style.css

@@ -282,6 +282,30 @@ select {
   font-size: 0.75rem;
 }
 
+/* Format warning (MKV etc.) */
+.format-warning {
+  width: 100%;
+  margin-top: 8px;
+  padding: 10px 14px;
+  background: rgba(243, 156, 18, 0.1);
+  border: 1px solid rgba(243, 156, 18, 0.3);
+  border-radius: var(--radius);
+  color: var(--warning);
+  font-size: 0.78rem;
+  line-height: 1.5;
+}
+
+.format-warning code {
+  display: inline-block;
+  margin-top: 4px;
+  padding: 2px 8px;
+  background: rgba(0, 0, 0, 0.3);
+  border-radius: 4px;
+  font-family: monospace;
+  font-size: 0.75rem;
+  color: var(--text-primary);
+}
+
 /* Buttons */
 .btn-primary {
   width: 100%;

server.ts

@@ -13,7 +13,6 @@ interface RoomState {
   fileInfo: FileInfo;
   playing: boolean;
   position: number;
-  speed: number;
   lastUpdate: number; // timestamp when position was last set
   users: Map<string, WebSocket>;
   chatHistory: ChatMessage[];
@@ -41,7 +40,7 @@ function generateRoomCode(): string {
 function getCurrentPosition(room: RoomState): number {
   if (!room.playing) return room.position;
   const elapsed = (Date.now() - room.lastUpdate) / 1000;
-  return room.position + elapsed * room.speed;
+  return room.position + elapsed; // assume 1x speed
 }
 
 function broadcastToRoom(room: RoomState, message: object, excludeWs?: WebSocket) {
@@ -159,7 +158,6 @@ const server = Bun.serve<WSData>({
             },
             playing: false,
             position: 0,
-            speed: 1,
             lastUpdate: Date.now(),
             users: new Map(),
             chatHistory: [],
@@ -249,7 +247,6 @@ const server = Bun.serve<WSData>({
               state: {
                 playing: room.playing,
                 position: getCurrentPosition(room),
-                speed: room.speed,
               },
               chatHistory: room.chatHistory.slice(-50),
             })
@@ -285,10 +282,6 @@ const server = Bun.serve<WSData>({
           } else if (msg.action === "seek") {
             room.position = msg.position;
             room.lastUpdate = Date.now();
-          } else if (msg.action === "speed") {
-            room.position = getCurrentPosition(room);
-            room.speed = msg.speed;
-            room.lastUpdate = Date.now();
           }
 
           // Broadcast to others
@@ -299,7 +292,6 @@ const server = Bun.serve<WSData>({
               action: msg.action,
               position: room.position,
               playing: room.playing,
-              speed: room.speed,
               username: ws.data.username,
               timestamp: Date.now(),
             },
@@ -343,7 +335,6 @@ const server = Bun.serve<WSData>({
               state: {
                 playing: room.playing,
                 position: getCurrentPosition(room),
-                speed: room.speed,
               },
             })
           );
@@ -388,7 +379,6 @@ const server = Bun.serve<WSData>({
               state: {
                 playing: room.playing,
                 position: getCurrentPosition(room),
-                speed: room.speed,
               },
               chatHistory: room.chatHistory.slice(-50),
             })