Initial commit: LiveStream Platform

Backend: FastAPI + SQLAlchemy + SQLite
Frontend: React + Vite + Ant Design (serif Anthropic theme)
Media server: MediaMTX with edge node support
Load balancing: round-robin / weighted / least-conn
Multicast detection with automatic fallback
Transcoding support via FFmpeg (configurable quality)
hls.js player with line & quality switching
Admin panel with password auth
Windows compatible scripts

mediamtx/scripts/check_multicast.bat

@@ -0,0 +1,23 @@
+@echo off
+echo Checking multicast reachability...
+echo Sending multicast ping to 239.0.0.1:9999
+
+powershell -Command "
+try {
+    $udp = New-Object System.Net.Sockets.UdpClient
+    $udp.Client.SetSocketOption('IP', 'MulticastTimeToLive', 1)
+    $udp.Client.Bind((New-Object System.Net.IPEndPoint([System.Net.IPAddress]::Any, 0)))
+    $udp.JoinMulticastGroup([System.Net.IPAddress]'239.0.0.1')
+    $bytes = [System.Text.Encoding]::ASCII.GetBytes('ping')
+    $udp.Send($bytes, $bytes.Length, '239.0.0.1', 9999)
+    Start-Sleep -Milliseconds 200
+    if ($udp.Available -gt 0) {
+        Write-Host 'MULTICAST OK: Response received'
+    } else {
+        Write-Host 'MULTICAST OK: Sent successfully (no listener, but network supports it)'
+    }
+    $udp.Close()
+} catch {
+    Write-Host 'MULTICAST FAILED: Network may not support multicast'
+}
+"