Fix CUDA VRAM exhaustion during video processing (#1721)

modules/core.py

@@ -143,8 +143,7 @@ def suggest_execution_threads() -> int:
     if 'ROCMExecutionProvider' in modules.globals.execution_providers:
         return 1
     if 'CUDAExecutionProvider' in modules.globals.execution_providers:
-        # For CUDA, use more threads for parallel frame processing
-        return min(cpu_count, 16)
+        return 2
     
     # For CPU execution, use most cores but leave some for system
     return max(4, min(cpu_count - 2, 16))

modules/processors/frame/face_swapper.py

@@ -108,6 +108,14 @@ def get_face_swapper() -> Any:
                                 "MaximumCacheSize": 1024 * 1024 * 512,  # 512MB cache
                             }
                         ))
+                    elif p == "CUDAExecutionProvider":
+                        providers_config.append((
+                            "CUDAExecutionProvider",
+                            {
+                                "arena_extend_strategy": "kSameAsRequested",
+                                "cudnn_conv_algo_search": "DEFAULT",
+                            }
+                        ))
                     else:
                         providers_config.append(p)
                 FACE_SWAPPER = insightface.model_zoo.get_model(