refactor: persist stream selection in .stream_state instead of config.toml

verify_sync.py

@@ -660,7 +660,6 @@ def main():
     args = ap.parse_args()
 
     cfg = load_config(args.config)
-    ext = cfg.get("extract", {})
     sync_cfg = cfg.get("sync", {})
     audio_cfg = cfg.get("audio", {})
 
@@ -669,6 +668,17 @@ def main():
     out_dir = args.out or sync_cfg.get("out_dir", "output")
     lag_sec = args.lag
 
+    # Load stream selection from .stream_state (created by extract.py)
+    _state_path = os.path.join(os.path.dirname(os.path.abspath(__file__)), ".stream_state")
+    _state = {}
+    if os.path.exists(_state_path):
+        try:
+            import json
+            with open(_state_path, "r") as _sf:
+                _state = json.load(_sf)
+        except Exception:
+            pass
+
     if args.mode == "full":
         synced = args.synced
         if not synced:
@@ -691,11 +701,12 @@ def main():
 
         # Determine which streams to extract from synced MKV
         # A's streams are first, B's delayed streams follow
+        ext = cfg.get("extract", {})
         video_a = ext.get("file_a", "")
         a_streams_in = probe_audio_streams(video_a) if os.path.exists(video_a) else []
         n_a = len(a_streams_in)
-        sel_a = ext.get("audio_stream_a", 0) or 0
-        sel_b = ext.get("audio_stream_b", 0) or 0
+        sel_a = _state.get("audio_stream_a", 0) or 0
+        sel_b = _state.get("audio_stream_b", 0) or 0
         sel_a = int(sel_a)
         sel_b = int(sel_b)
         # Output indices: A's selected stream stays at sel_a, B's becomes n_a + sel_b