[LIP SYNC] Fix basicsr/torchvision 0.18+ compatibility

basicsr 1.4.2 imports from torchvision.transforms.functional_tensor,
which was removed in torchvision 0.17+. This fix creates a dummy
module at runtime so basicsr can import rgb_to_grayscale.

References:
- XPixelGroup/BasicSR#677
- xinntao/Real-ESRGAN#859

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Author: bizyb

lip-sync/lipsync/__init__.py

@@ -5,6 +5,23 @@
 in a video using MuseTalk, LivePortrait, and CodeFormer.
 """
 
+# =============================================================================
+# TORCHVISION COMPATIBILITY FIX - Must run before any basicsr import
+# =============================================================================
+# basicsr 1.4.2 imports from torchvision.transforms.functional_tensor, which was
+# removed in torchvision 0.17+. This fix creates a dummy module so basicsr works.
+import sys
+import types
+
+try:
+    from torchvision.transforms.functional_tensor import rgb_to_grayscale
+except ImportError:
+    from torchvision.transforms.functional import rgb_to_grayscale
+    _functional_tensor = types.ModuleType("torchvision.transforms.functional_tensor")
+    _functional_tensor.rgb_to_grayscale = rgb_to_grayscale
+    sys.modules["torchvision.transforms.functional_tensor"] = _functional_tensor
+# =============================================================================
+
 from .pipeline import LipSyncPipeline, PipelineConfig, FaceJob, process_lipsync
 from .compositor import FaceCompositor, FaceRegion
 from .alignment import FaceAligner, AlignmentMetadata, align_video, unalign_video

lip-sync/lipsync/codeformer.py

@@ -5,6 +5,26 @@
 reducing artifacts and improving visual fidelity.
 """
 
+# =============================================================================
+# TORCHVISION COMPATIBILITY FIX
+# =============================================================================
+# basicsr 1.4.2 imports from torchvision.transforms.functional_tensor, which was
+# removed in torchvision 0.17+. This fix creates a dummy module so basicsr works.
+# See: https://github.com/XPixelGroup/BasicSR/pull/677
+# See: https://github.com/xinntao/Real-ESRGAN/issues/859
+import sys
+import types
+
+try:
+    from torchvision.transforms.functional_tensor import rgb_to_grayscale
+except ImportError:
+    from torchvision.transforms.functional import rgb_to_grayscale
+    # Create a fake module for backward compatibility
+    _functional_tensor = types.ModuleType("torchvision.transforms.functional_tensor")
+    _functional_tensor.rgb_to_grayscale = rgb_to_grayscale
+    sys.modules["torchvision.transforms.functional_tensor"] = _functional_tensor
+# =============================================================================
+
 import logging
 import os
 import time

lip-sync/scripts/validate-imports.py

@@ -22,6 +22,24 @@
 
 import sys
 import os
+import types
+
+# =============================================================================
+# TORCHVISION COMPATIBILITY FIX - Must run before any basicsr import
+# =============================================================================
+# basicsr 1.4.2 imports from torchvision.transforms.functional_tensor, which was
+# removed in torchvision 0.17+. This fix creates a dummy module so basicsr works.
+try:
+    from torchvision.transforms.functional_tensor import rgb_to_grayscale
+except ImportError:
+    try:
+        from torchvision.transforms.functional import rgb_to_grayscale
+        _functional_tensor = types.ModuleType("torchvision.transforms.functional_tensor")
+        _functional_tensor.rgb_to_grayscale = rgb_to_grayscale
+        sys.modules["torchvision.transforms.functional_tensor"] = _functional_tensor
+    except ImportError:
+        pass  # torchvision not installed yet, that's fine for import validation
+# =============================================================================
 
 # Add the lip-sync directory to path
 script_dir = os.path.dirname(os.path.abspath(__file__))