Fix flickering: detect faces every frame, no per-frame enhancement in video

processors/face_swap.py

@@ -465,11 +465,8 @@ class FaceSwapper:
         for tgt_face in target_faces:
             result = self._swapper.get(result, tgt_face, source_face, paste_back=True)
 
-        if enhance:
-            # Use OpenCV enhancement for video — CodeFormer causes per-frame
-            # temporal flicker (each frame independently restored = jitter).
-            # OpenCV unsharp+CLAHE is temporally stable and fast.
-            result = self._enhance_opencv(result, target_faces)
+        # No per-frame enhancement for video — temporally unstable (causes flicker).
+        # FFmpeg unsharp filter handles sharpening globally at encode time.
 
         # Scale back up to original frame size
         if scale_down < 1.0:

processors/video_processor.py

@@ -19,7 +19,7 @@ import numpy as np
 from pathlib import Path
 
 MAX_FRAMES   = 600   # ~20 s at 30 fps
-DET_INTERVAL = 5     # re-detect target faces every N frames
+DET_INTERVAL = 1     # detect faces every frame — caching causes flicker when face moves
 
 
 class VideoProcessor: