feat: add Windows-first deployment flow

backend/services/transcoder.py

@@ -24,7 +24,7 @@ class TranscodeManager:
             audio_bitrate = quality.get("audio_bitrate", "128k")
             keyframe_seconds = quality.get("keyframe_seconds", segment_seconds)
             keyframe_frames = keyframe_seconds * fps
-            hls_dir = f"/tmp/hls/{stream_key}/{label}"
+            hls_dir = os.path.join(settings.hls_runtime_dir, stream_key, label)
             os.makedirs(hls_dir, exist_ok=True)
             cmd = [
                 "ffmpeg", "-y",
@@ -42,8 +42,8 @@ class TranscodeManager:
                 "-hls_time", str(segment_seconds),
                 "-hls_list_size", "6",
                 "-hls_flags", "delete_segments+independent_segments+program_date_time",
-                "-hls_segment_filename", f"{hls_dir}/segment_%03d.ts",
-                f"{hls_dir}/index.m3u8",
+                "-hls_segment_filename", os.path.join(hls_dir, "segment_%03d.ts"),
+                os.path.join(hls_dir, "index.m3u8"),
             ]
             try:
                 proc = subprocess.Popen(
@@ -72,4 +72,4 @@ class TranscodeManager:
             self.stop_transcode(key)
 
 
-transcode_mgr = TranscodeManager()
+transcode_mgr = TranscodeManager()