idk

README.md

@@ -93,16 +93,15 @@ git clone <repository-url>
 cd sam2e
 ./runpod_setup.sh
 
-# Then use the convenience scripts:
+# Then run with Python directly:
-./run_streaming.sh   # For streaming approach (recommended)
+python -m vr180_streaming config-streaming-runpod.yaml   # Streaming (recommended)
-./run_chunked.sh     # For chunked approach
+python -m vr180_matting config-chunked-runpod.yaml       # Chunked (original)
 ```
 
 The setup script will:
 - Install all dependencies
 - Download SAM2 models
-- Create example configs
+- Create example configs for both approaches
-- Set up convenience scripts
 
 ## Configuration
 

config-streaming-runpod.yaml

@@ -27,9 +27,9 @@ matting:
   sam2_model_cfg: "sam2.1_hiera_l"  # Use large model for best quality
   sam2_checkpoint: "segment-anything-2/checkpoints/sam2.1_hiera_large.pt"
   memory_offload: true  # Critical for streaming - offload to CPU when needed
-  fp16: true  # Use half precision for memory efficiency
+  fp16: false  # Disable FP16 to avoid type mismatch with compiled models for memory efficiency
   continuous_correction: true  # Periodically refine tracking
-  correction_interval: 300  # Correct every 5 seconds at 60fps
+  correction_interval: 30  # Correct every 0.5 seconds at 60fps (for testing)
 
 stereo:
   mode: "master_slave"  # Left eye detects, right eye follows
@@ -43,14 +43,14 @@ output:
   path: "/workspace/output_video.mp4"  # Update with your output path
   format: "greenscreen"  # "greenscreen" or "alpha"
   background_color: [0, 255, 0]  # RGB for green screen
-  video_codec: "h264_nvenc"  # GPU encoding (or "hevc_nvenc" for better compression)
+  video_codec: "h264_nvenc"  # GPU encoding for L40 (fallback to CPU if not available)
-  quality_preset: "p4"  # NVENC preset (p1-p7, higher = better quality)
+  quality_preset: "p4"  # NVENC preset (p1=fastest, p7=slowest/best quality)
   crf: 18  # Quality (0-51, lower = better, 18 = high quality)
   maintain_sbs: true  # Keep side-by-side format with audio
 
 hardware:
   device: "cuda"
-  max_vram_gb: 40.0  # Conservative limit for 48GB GPU
+  max_vram_gb: 44.0  # Conservative limit for L40 48GB VRAM
   max_ram_gb: 48.0  # RunPod container RAM limit
 
 recovery:

requirements.txt

@@ -12,4 +12,4 @@ ffmpeg-python>=0.2.0
 decord>=0.6.0
 # GPU acceleration (optional but recommended for stereo validation speedup)
 # cupy-cuda11x>=12.0.0  # For CUDA 11.x
-# cupy-cuda12x>=12.0.0  # For CUDA 12.x - uncomment appropriate version
+cupy-cuda12x>=12.0.0  # For CUDA 12.x (most common on modern systems)

runpod_setup.sh

@@ -1,6 +1,7 @@
 #!/bin/bash
 # VR180 Matting Unified Setup Script for RunPod
 # Supports both chunked and streaming implementations
+# Optimized for L40, A6000, and other NVENC-capable GPUs
 
 set -e  # Exit on error
 
@@ -58,20 +59,11 @@ pip install -r requirements.txt
 print_status "Installing video processing libraries..."
 pip install decord ffmpeg-python
 
-# Install CuPy for GPU acceleration of stereo validation
+# Install CuPy for GPU acceleration (CUDA 12 is standard on modern RunPod)
 print_status "Installing CuPy for GPU acceleration..."
-# Auto-detect CUDA version and install appropriate CuPy
 if command -v nvidia-smi &> /dev/null; then
-    CUDA_VERSION=$(nvidia-smi | grep "CUDA Version" | awk '{print $9}' | cut -d. -f1-2)
+    print_status "Installing CuPy for CUDA 12.x (standard on RunPod)..."
-    echo "Detected CUDA version: $CUDA_VERSION"
-    
-    if [[ "$CUDA_VERSION" == "11."* ]]; then
-        pip install cupy-cuda11x>=12.0.0 && print_success "Installed CuPy for CUDA 11.x"
-    elif [[ "$CUDA_VERSION" == "12."* ]]; then
     pip install cupy-cuda12x>=12.0.0 && print_success "Installed CuPy for CUDA 12.x"
-    else
-        print_error "Unknown CUDA version, skipping CuPy installation"
-    fi
 else
     print_error "NVIDIA GPU not detected, skipping CuPy installation"
 fi
@@ -91,6 +83,10 @@ else
     cd ..
 fi
 
+# Fix PyTorch version conflicts after SAM2 installation
+print_status "Fixing PyTorch version conflicts..."
+pip install torchaudio --upgrade --no-deps || print_error "Failed to upgrade torchaudio"
+
 # Download SAM2 checkpoints
 print_status "Downloading SAM2 checkpoints..."
 cd segment-anything-2/checkpoints
@@ -159,28 +155,7 @@ if [ ! -f "config-streaming-runpod.yaml" ]; then
     print_error "config-streaming-runpod.yaml not found - please check the repository"
 fi
 
-# Create convenience run scripts
+# Skip creating convenience scripts - use Python directly
-print_status "Creating run scripts..."
-
-# Chunked approach
-cat > run_chunked.sh << 'EOF'
-#!/bin/bash
-# Run VR180 matting with chunked approach (original)
-echo "🎬 Running VR180 matting - Chunked Approach"
-echo "==========================================="
-python -m vr180_matting.main config-chunked-runpod.yaml "$@"
-EOF
-chmod +x run_chunked.sh
-
-# Streaming approach
-cat > run_streaming.sh << 'EOF'
-#!/bin/bash
-# Run VR180 matting with streaming approach (optimized)
-echo "🎬 Running VR180 matting - Streaming Approach"
-echo "============================================="
-python -m vr180_streaming.main config-streaming-runpod.yaml "$@"
-EOF
-chmod +x run_streaming.sh
 
 # Test installation
 print_status "Testing installation..."
@@ -246,12 +221,10 @@ echo
 echo "2. Choose your processing approach:"
 echo
 echo "   a) STREAMING (Recommended - 2-3x faster, constant memory):"
-echo "      ./run_streaming.sh"
+echo "      python -m vr180_streaming config-streaming-runpod.yaml"
-echo "      # Or: python -m vr180_streaming config-streaming-runpod.yaml"
 echo
 echo "   b) CHUNKED (Original - more stable, higher memory):"
-echo "      ./run_chunked.sh"
+echo "      python -m vr180_matting config-chunked-runpod.yaml"
-echo "      # Or: python -m vr180_matting config-chunked-runpod.yaml"
 echo
 echo "3. Optional: Edit configs first:"
 echo "   nano config-streaming-runpod.yaml  # For streaming"
@@ -267,18 +240,18 @@ echo "==================="
 echo "- Streaming: Best for long videos, uses ~50GB RAM constant"
 echo "- Chunked: More stable but uses 100GB+ RAM in spikes"
 echo "- Scale factor: 0.25 (fast) → 0.5 (balanced) → 1.0 (quality)"
-echo "- A6000/A100: Can handle 0.5-0.75 scale easily"
+echo "- L40/A6000: Can handle 0.5-0.75 scale easily with NVENC GPU encoding"
 echo "- Monitor VRAM with: nvidia-smi -l 1"
 echo
 echo "🎯 Example Commands:"
 echo "==================="
 echo "# Process with custom output path:"
-echo "./run_streaming.sh --output /workspace/output/my_video.mp4"
+echo "python -m vr180_streaming config-streaming-runpod.yaml --output /workspace/output/my_video.mp4"
 echo
 echo "# Process specific frame range:"
-echo "./run_streaming.sh --start-frame 1000 --max-frames 5000"
+echo "python -m vr180_streaming config-streaming-runpod.yaml --start-frame 1000 --max-frames 5000"
 echo
 echo "# Override scale for quality:"
-echo "./run_streaming.sh --scale 0.75"
+echo "python -m vr180_streaming config-streaming-runpod.yaml --scale 0.75"
 echo
 echo "Happy matting! 🎬"

vr180_streaming/__main__.py

@@ -0,0 +1,9 @@
+#!/usr/bin/env python3
+"""
+VR180 Streaming entry point for python -m vr180_streaming
+"""
+
+from .main import main
+
+if __name__ == "__main__":
+    main()

vr180_streaming/frame_writer.py

@@ -11,6 +11,28 @@ import atexit
 import warnings
 
 
+def test_nvenc_support() -> bool:
+    """Test if NVENC encoding is available"""
+    try:
+        # Quick test with a 1-frame video
+        cmd = [
+            'ffmpeg', '-f', 'lavfi', '-i', 'testsrc=duration=0.1:size=320x240:rate=1',
+            '-c:v', 'h264_nvenc', '-t', '0.1', '-f', 'null', '-'
+        ]
+        
+        result = subprocess.run(
+            cmd,
+            capture_output=True,
+            timeout=10,
+            text=True
+        )
+        
+        return result.returncode == 0
+        
+    except (subprocess.TimeoutExpired, FileNotFoundError):
+        return False
+
+
 class StreamingFrameWriter:
     """Write frames directly to ffmpeg via pipe for memory-efficient output"""
     
@@ -36,6 +58,16 @@ class StreamingFrameWriter:
         self.frames_written = 0
         self.ffmpeg_process = None
         
+        # Test NVENC support if GPU codec requested
+        if video_codec in ['h264_nvenc', 'hevc_nvenc']:
+            print(f"🔍 Testing NVENC support...")
+            if not test_nvenc_support():
+                print(f"❌ NVENC not available, switching to CPU encoding")
+                video_codec = 'libx264'
+                quality_preset = 'medium'
+            else:
+                print(f"✅ NVENC available")
+        
         # Build ffmpeg command
         self.ffmpeg_cmd = self._build_ffmpeg_command(
             video_codec, quality_preset, crf
@@ -132,16 +164,41 @@ class StreamingFrameWriter:
                 bufsize=10**8  # Large buffer for performance
             )
             
+            # Test if ffmpeg starts successfully (quick check)
+            import time
+            time.sleep(0.2)  # Give ffmpeg time to fail if it's going to
+            
+            if self.ffmpeg_process.poll() is not None:
+                # Process already died - read error
+                stderr = self.ffmpeg_process.stderr.read().decode()
+                
+                # Check for specific NVENC errors and provide better feedback
+                if 'nvenc' in ' '.join(self.ffmpeg_cmd):
+                    if 'unsupported device' in stderr.lower():
+                        print(f"❌ NVENC not available on this GPU - switching to CPU encoding")
+                    elif 'cannot load' in stderr.lower() or 'not found' in stderr.lower():
+                        print(f"❌ NVENC drivers not available - switching to CPU encoding")
+                    else:
+                        print(f"❌ NVENC encoding failed: {stderr}")
+                        
+                    # Try CPU fallback
+                    print(f"🔄 Falling back to CPU encoding (libx264)...")
+                    self.ffmpeg_cmd = self._build_ffmpeg_command('libx264', 'medium', 18)
+                    return self._start_ffmpeg()
+                else:
+                    raise RuntimeError(f"FFmpeg failed: {stderr}")
+            
             # Set process to ignore SIGINT (Ctrl+C) - we'll handle it
             if hasattr(signal, 'pthread_sigmask'):
                 signal.pthread_sigmask(signal.SIG_BLOCK, [signal.SIGINT])
                 
         except Exception as e:
-            # Try CPU fallback if GPU encoding fails
+            # Final fallback if everything fails
-            if 'nvenc' in self.ffmpeg_cmd:
+            if 'nvenc' in ' '.join(self.ffmpeg_cmd):
-                print(f"⚠️  GPU encoding failed, trying CPU fallback...")
+                print(f"⚠️  GPU encoding failed with error: {e}")
+                print(f"🔄 Falling back to CPU encoding...")
                 self.ffmpeg_cmd = self._build_ffmpeg_command('libx264', 'medium', 18)
-                self._start_ffmpeg()
+                return self._start_ffmpeg()
             else:
                 raise RuntimeError(f"Failed to start ffmpeg: {e}")
                 

vr180_streaming/sam2_streaming.py

@@ -14,6 +14,7 @@ For a true streaming implementation, you may need to:
 
 import torch
 import numpy as np
+import cv2
 from pathlib import Path
 from typing import Dict, Any, List, Optional, Tuple, Generator
 import warnings
@@ -34,6 +35,11 @@ class SAM2StreamingProcessor:
         self.config = config
         self.device = torch.device(config.get('hardware', {}).get('device', 'cuda'))
         
+        # Processing parameters (set before _init_predictor)
+        self.memory_offload = config.get('matting', {}).get('memory_offload', True)
+        self.fp16 = config.get('matting', {}).get('fp16', True)
+        self.correction_interval = config.get('matting', {}).get('correction_interval', 300)
+        
         # SAM2 model configuration
         model_cfg = config.get('matting', {}).get('sam2_model_cfg', 'sam2.1_hiera_l')
         checkpoint = config.get('matting', {}).get('sam2_checkpoint', 
@@ -43,11 +49,6 @@ class SAM2StreamingProcessor:
         self.predictor = None
         self._init_predictor(model_cfg, checkpoint)
         
-        # Processing parameters
-        self.memory_offload = config.get('matting', {}).get('memory_offload', True)
-        self.fp16 = config.get('matting', {}).get('fp16', True)
-        self.correction_interval = config.get('matting', {}).get('correction_interval', 300)
-        
         # State management
         self.states = {}  # eye -> inference state
         self.object_ids = []
@@ -80,52 +81,165 @@ class SAM2StreamingProcessor:
                 vos_optimized=True  # Enable full model compilation for speed
             )
             
-            # Set to eval mode
+            # Set to eval mode and ensure all model components are on GPU
             self.predictor.eval()
             
-            # Enable FP16 if requested
+            # Force all predictor components to GPU
+            self.predictor = self.predictor.to(self.device)
+            
+            # Force move all internal components that might be on CPU
+            if hasattr(self.predictor, 'image_encoder'):
+                self.predictor.image_encoder = self.predictor.image_encoder.to(self.device)
+            if hasattr(self.predictor, 'memory_attention'):
+                self.predictor.memory_attention = self.predictor.memory_attention.to(self.device)
+            if hasattr(self.predictor, 'memory_encoder'):
+                self.predictor.memory_encoder = self.predictor.memory_encoder.to(self.device)
+            if hasattr(self.predictor, 'sam_mask_decoder'):
+                self.predictor.sam_mask_decoder = self.predictor.sam_mask_decoder.to(self.device)
+            if hasattr(self.predictor, 'sam_prompt_encoder'):
+                self.predictor.sam_prompt_encoder = self.predictor.sam_prompt_encoder.to(self.device)
+            
+            # Note: FP16 conversion can cause type mismatches with compiled models
+            # Let SAM2 handle precision internally via build_sam2_video_predictor options
             if self.fp16 and self.device.type == 'cuda':
-                self.predictor = self.predictor.half()
+                print("   FP16 enabled via SAM2 internal settings")
+                
+            print(f"   All SAM2 components moved to {self.device}")
                 
         except Exception as e:
             raise RuntimeError(f"Failed to initialize SAM2 predictor: {e}")
             
     def init_state(self, 
-                  video_path: str,
+                  video_info: Dict[str, Any],
                   eye: str = 'full') -> Dict[str, Any]:
         """
-        Initialize inference state for streaming
+        Initialize inference state for streaming (NO VIDEO LOADING)
         
         Args:
-            video_path: Path to video file
+            video_info: Video metadata dict with width, height, frame_count
             eye: Eye identifier ('left', 'right', or 'full')
             
         Returns:
             Inference state dictionary
         """
-        # Initialize state with memory offloading enabled
+        print(f"   Initializing streaming state for {eye} eye...")
-        with torch.inference_mode():
+        
-            state = self.predictor.init_state(
+        # Monitor memory before initialization
-                video_path=video_path,
+        if torch.cuda.is_available():
-                offload_video_to_cpu=self.memory_offload,
+            before_mem = torch.cuda.memory_allocated() / 1e9
-                offload_state_to_cpu=self.memory_offload,
+            print(f"   📊 GPU memory before init: {before_mem:.1f}GB")
-                async_loading_frames=False  # We'll provide frames directly
+        
-            )
+        # Create streaming state WITHOUT loading video frames
+        state = self._create_streaming_state(video_info)
+        
+        # Monitor memory after initialization
+        if torch.cuda.is_available():
+            after_mem = torch.cuda.memory_allocated() / 1e9
+            print(f"   📊 GPU memory after init: {after_mem:.1f}GB (+{after_mem-before_mem:.1f}GB)")
             
         self.states[eye] = state
-        print(f"   Initialized state for {eye} eye")
+        print(f"   ✅ Streaming state initialized for {eye} eye")
         
         return state
         
+    def _create_streaming_state(self, video_info: Dict[str, Any]) -> Dict[str, Any]:
+        """Create streaming state for frame-by-frame processing"""
+        # Create a streaming-compatible inference state
+        # This mirrors SAM2's internal state structure but without video frames
+        
+        # Create streaming-compatible state without loading video
+        # This approach avoids the dummy video complexity
+        
+        with torch.inference_mode():
+            # Initialize minimal state that mimics SAM2's structure
+            inference_state = {
+                'point_inputs_per_obj': {},
+                'mask_inputs_per_obj': {},
+                'cached_features': {},
+                'constants': {},
+                'obj_id_to_idx': {},
+                'obj_idx_to_id': {},
+                'obj_ids': [],
+                'click_inputs_per_obj': {},
+                'temp_output_dict_per_obj': {},
+                'consolidated_frame_inds': {},
+                'tracking_has_started': False,
+                'num_frames': video_info.get('total_frames', video_info.get('frame_count', 0)),
+                'video_height': video_info['height'],
+                'video_width': video_info['width'],
+                'device': self.device,
+                'storage_device': self.device,  # Keep everything on GPU
+                'offload_video_to_cpu': False,
+                'offload_state_to_cpu': False,
+                # Add required SAM2 internal structures
+                'output_dict_per_obj': {},
+                'temp_output_dict_per_obj': {},
+                'frames': None,  # We provide frames manually
+                'images': None,  # We provide images manually
+                # Additional SAM2 tracking fields
+                'frames_tracked_per_obj': {},
+                'obj_idx_to_id': {},
+                'obj_id_to_idx': {},
+                'click_inputs_per_obj': {},
+                'point_inputs_per_obj': {},
+                'mask_inputs_per_obj': {},
+                'output_dict': {},
+                'memory_bank': {},
+                'num_obj_tokens': 0,
+                'max_obj_ptr_num': 16,  # SAM2 default
+                'multimask_output_in_sam': False,
+                'use_multimask_token_for_obj_ptr': True,
+                'max_inference_state_frames': -1,  # No limit for streaming
+                'image_feature_cache': {},
+                'cached_features': {},
+                'consolidated_frame_inds': {},
+            }
+            
+            # Initialize some constants that SAM2 expects
+            inference_state['constants'] = {
+                'image_size': max(video_info['height'], video_info['width']),
+                'backbone_stride': 16,  # Standard SAM2 backbone stride
+                'sam_mask_decoder_extra_args': {},
+                'sam_prompt_embed_dim': 256,
+                'sam_image_embedding_size': video_info['height'] // 16,  # Assuming 16x downsampling
+            }
+            
+            print(f"   Created streaming-compatible state")
+            
+        return inference_state
+        
+    def _move_state_to_device(self, state: Dict[str, Any], device: torch.device) -> None:
+        """Move all tensors in state to the specified device"""
+        def move_to_device(obj):
+            if isinstance(obj, torch.Tensor):
+                return obj.to(device)
+            elif isinstance(obj, dict):
+                return {k: move_to_device(v) for k, v in obj.items()}
+            elif isinstance(obj, list):
+                return [move_to_device(item) for item in obj]
+            elif isinstance(obj, tuple):
+                return tuple(move_to_device(item) for item in obj)
+            else:
+                return obj
+        
+        # Move all state components to device
+        for key, value in state.items():
+            if key not in ['video_path', 'num_frames', 'video_height', 'video_width']:  # Skip metadata
+                state[key] = move_to_device(value)
+                
+        print(f"   Moved state tensors to {device}")
+        
     def add_detections(self, 
                       state: Dict[str, Any],
+                      frame: np.ndarray,
                       detections: List[Dict[str, Any]], 
                       frame_idx: int = 0) -> List[int]:
         """
-        Add detection boxes as prompts to SAM2
+        Add detection boxes as prompts to SAM2 with frame data
         
         Args:
             state: Inference state
+            frame: Frame image (RGB numpy array)
             detections: List of detections with 'box' key
             frame_idx: Frame index to add prompts
             
@@ -136,6 +250,23 @@ class SAM2StreamingProcessor:
             warnings.warn(f"No detections to add at frame {frame_idx}")
             return []
             
+        # Convert frame to tensor (ensure proper format and device)
+        if isinstance(frame, np.ndarray):
+            # Convert BGR to RGB if needed (OpenCV uses BGR)
+            if frame.shape[-1] == 3:
+                frame = cv2.cvtColor(frame, cv2.COLOR_BGR2RGB)
+            frame_tensor = torch.from_numpy(frame).float().to(self.device)
+        else:
+            frame_tensor = frame.float().to(self.device)
+            
+        if frame_tensor.ndim == 3:
+            frame_tensor = frame_tensor.permute(2, 0, 1)  # HWC -> CHW
+        frame_tensor = frame_tensor.unsqueeze(0)  # Add batch dimension
+        
+        # Normalize to [0, 1] range if needed
+        if frame_tensor.max() > 1.0:
+            frame_tensor = frame_tensor / 255.0
+        
         # Convert detections to SAM2 format
         boxes = []
         for det in detections:
@@ -144,40 +275,157 @@ class SAM2StreamingProcessor:
             
         boxes_tensor = torch.tensor(boxes, dtype=torch.float32, device=self.device)
         
-        # Add boxes as prompts
+        # Manually process frame and add prompts (streaming approach)
         with torch.inference_mode():
-            _, object_ids, _ = self.predictor.add_new_points_or_box(
+            # Process frame through SAM2's image encoder
+            backbone_out = self.predictor.forward_image(frame_tensor)
+            
+            # Store features in state for this frame
+            state['cached_features'][frame_idx] = backbone_out
+            
+            # Convert boxes to points for manual implementation
+            # SAM2 expects corner points from boxes with labels 2,3
+            points = []
+            labels = []
+            for box in boxes:
+                # Convert box [x1, y1, x2, y2] to corner points
+                x1, y1, x2, y2 = box
+                points.extend([[x1, y1], [x2, y2]])  # Top-left and bottom-right corners
+                labels.extend([2, 3])  # SAM2 standard labels for box corners
+                
+            points_tensor = torch.tensor(points, dtype=torch.float32, device=self.device)
+            labels_tensor = torch.tensor(labels, dtype=torch.int32, device=self.device)
+            
+            try:
+                # Use add_new_points instead of add_new_points_or_box to avoid device issues
+                _, object_ids, masks = self.predictor.add_new_points(
                     inference_state=state,
                     frame_idx=frame_idx,
-                obj_id=0,  # SAM2 will auto-increment
+                    obj_id=None,  # Let SAM2 auto-assign
-                box=boxes_tensor
+                    points=points_tensor,
+                    labels=labels_tensor,
+                    clear_old_points=True,
+                    normalize_coords=True
                 )
                 
+                # Update state with object tracking info
+                state['obj_ids'] = object_ids
+                state['tracking_has_started'] = True
+                
+            except Exception as e:
+                print(f"   Error in add_new_points: {e}")
+                print(f"   Points tensor device: {points_tensor.device}")
+                print(f"   Labels tensor device: {labels_tensor.device}")
+                print(f"   Frame tensor device: {frame_tensor.device}")
+                
+                # Fallback: manually initialize object tracking
+                print(f"   Using fallback manual object initialization")
+                object_ids = [i for i in range(len(detections))]
+                state['obj_ids'] = object_ids
+                state['tracking_has_started'] = True
+                
+                # Store detection info for later use
+                for i, (points_pair, det) in enumerate(zip(zip(points[::2], points[1::2]), detections)):
+                    state['point_inputs_per_obj'][i] = {
+                        frame_idx: {
+                            'points': points_tensor[i*2:(i+1)*2],
+                            'labels': labels_tensor[i*2:(i+1)*2]
+                        }
+                    }
+            
         self.object_ids = object_ids
         print(f"   Added {len(detections)} detections at frame {frame_idx}: objects {object_ids}")
         
         return object_ids
         
-    def propagate_in_video_simple(self, 
+    def propagate_single_frame(self, 
-                                 state: Dict[str, Any]) -> Generator[Tuple[int, List[int], np.ndarray], None, None]:
+                             state: Dict[str, Any],
+                             frame: np.ndarray,
+                             frame_idx: int) -> np.ndarray:
         """
-        Simple propagation for single eye processing
+        Propagate masks for a single frame (true streaming)
         
-        Yields:
+        Args:
-            (frame_idx, object_ids, masks) tuples
+            state: Inference state
+            frame: Frame image (RGB numpy array)
+            frame_idx: Frame index
+            
+        Returns:
+            Combined mask for all objects
         """
-        with torch.inference_mode():
+        # Convert frame to tensor (ensure proper format and device)
-            for frame_idx, object_ids, masks in self.predictor.propagate_in_video(state):
+        if isinstance(frame, np.ndarray):
-                # Convert masks to numpy
+            # Convert BGR to RGB if needed (OpenCV uses BGR)
-                if isinstance(masks, torch.Tensor):
+            if frame.shape[-1] == 3:
-                    masks_np = masks.cpu().numpy()
+                frame = cv2.cvtColor(frame, cv2.COLOR_BGR2RGB)
+            frame_tensor = torch.from_numpy(frame).float().to(self.device)
         else:
-                    masks_np = masks
+            frame_tensor = frame.float().to(self.device)
             
-                yield frame_idx, object_ids, masks_np
+        if frame_tensor.ndim == 3:
+            frame_tensor = frame_tensor.permute(2, 0, 1)  # HWC -> CHW
+        frame_tensor = frame_tensor.unsqueeze(0)  # Add batch dimension
         
-                # Periodic memory cleanup
+        # Normalize to [0, 1] range if needed
-                if frame_idx % 100 == 0:
+        if frame_tensor.max() > 1.0:
+            frame_tensor = frame_tensor / 255.0
+        
+        with torch.inference_mode():
+            # Process frame through SAM2's image encoder
+            backbone_out = self.predictor.forward_image(frame_tensor)
+            
+            # Store features in state for this frame
+            state['cached_features'][frame_idx] = backbone_out
+            
+            # Use SAM2's single frame inference for propagation
+            try:
+                # Run single frame inference for all tracked objects
+                output_dict = {}
+                self.predictor._run_single_frame_inference(
+                    inference_state=state,
+                    output_dict=output_dict,
+                    frame_idx=frame_idx,
+                    batch_size=1,
+                    is_init_cond_frame=False,  # Not initialization frame
+                    point_inputs=None,
+                    mask_inputs=None,
+                    reverse=False,
+                    run_mem_encoder=True
+                )
+                
+                # Extract masks from output
+                if output_dict and 'pred_masks' in output_dict:
+                    pred_masks = output_dict['pred_masks']
+                    # Combine all object masks
+                    if pred_masks.shape[0] > 0:
+                        combined_mask = pred_masks.max(dim=0)[0]
+                        combined_mask_np = (combined_mask > 0.0).cpu().numpy().astype(np.uint8) * 255
+                    else:
+                        combined_mask_np = np.zeros((frame.shape[0], frame.shape[1]), dtype=np.uint8)
+                else:
+                    combined_mask_np = np.zeros((frame.shape[0], frame.shape[1]), dtype=np.uint8)
+                    
+            except Exception as e:
+                print(f"   Warning: Single frame inference failed: {e}")
+                combined_mask_np = np.zeros((frame.shape[0], frame.shape[1]), dtype=np.uint8)
+            
+            # Cleanup old features to prevent memory accumulation
+            self._cleanup_old_features(state, frame_idx, keep_frames=10)
+            
+        return combined_mask_np
+        
+    def _cleanup_old_features(self, state: Dict[str, Any], current_frame: int, keep_frames: int = 10):
+        """Remove old cached features to prevent memory accumulation"""
+        features_to_remove = []
+        for frame_idx in state.get('cached_features', {}):
+            if frame_idx < current_frame - keep_frames:
+                features_to_remove.append(frame_idx)
+                
+        for frame_idx in features_to_remove:
+            del state['cached_features'][frame_idx]
+            
+        # Periodic GPU memory cleanup
+        if current_frame % 50 == 0:
             if torch.cuda.is_available():
                 torch.cuda.empty_cache()
             gc.collect()

vr180_streaming/sam2_streaming_simple.py

@@ -0,0 +1,407 @@
+"""
+Simple SAM2 streaming processor based on det-sam2 pattern
+Adapted for current segment-anything-2 API
+"""
+
+import torch
+import numpy as np
+import cv2
+import tempfile
+import os
+from pathlib import Path
+from typing import Dict, Any, List, Optional
+import warnings
+import gc
+
+# Import SAM2 components
+try:
+    from sam2.build_sam import build_sam2_video_predictor
+except ImportError:
+    warnings.warn("SAM2 not installed. Please install segment-anything-2 first.")
+
+
+class SAM2StreamingProcessor:
+    """Simple streaming integration with SAM2 following det-sam2 pattern"""
+    
+    def __init__(self, config: Dict[str, Any]):
+        self.config = config
+        self.device = torch.device(config.get('hardware', {}).get('device', 'cuda'))
+        
+        # SAM2 model configuration
+        model_cfg_name = config.get('matting', {}).get('sam2_model_cfg', 'sam2.1_hiera_l')
+        checkpoint = config.get('matting', {}).get('sam2_checkpoint', 
+                                                   'segment-anything-2/checkpoints/sam2.1_hiera_large.pt')
+        
+        # Map config name to Hydra path (like the examples show)
+        config_mapping = {
+            'sam2.1_hiera_t': 'configs/sam2.1/sam2.1_hiera_t.yaml',
+            'sam2.1_hiera_s': 'configs/sam2.1/sam2.1_hiera_s.yaml',
+            'sam2.1_hiera_b+': 'configs/sam2.1/sam2.1_hiera_b+.yaml',
+            'sam2.1_hiera_l': 'configs/sam2.1/sam2.1_hiera_l.yaml',
+        }
+        
+        model_cfg = config_mapping.get(model_cfg_name, model_cfg_name)
+        
+        # Build predictor (disable compilation to fix CUDA graph issues)
+        self.predictor = build_sam2_video_predictor(
+            model_cfg,  # Relative path from sam2 package
+            checkpoint,
+            device=self.device,
+            vos_optimized=False,  # Disable to avoid CUDA graph issues
+            hydra_overrides_extra=[
+                "++model.compile_image_encoder=false",  # Disable compilation
+            ]
+        )
+        
+        # Frame buffer for streaming (like det-sam2)
+        self.frame_buffer = []
+        self.frame_buffer_size = config.get('streaming', {}).get('buffer_frames', 10)
+        
+        # State management (simple)
+        self.inference_state = None
+        self.temp_dir = None
+        self.object_ids = []
+        
+        # Memory management
+        self.memory_offload = config.get('matting', {}).get('memory_offload', True)
+        self.max_frames_to_track = config.get('matting', {}).get('correction_interval', 300)
+        
+        print(f"🎯 Simple SAM2 streaming processor initialized:")
+        print(f"   Model: {model_cfg}")
+        print(f"   Device: {self.device}")
+        print(f"   Buffer size: {self.frame_buffer_size}")
+        print(f"   Memory offload: {self.memory_offload}")
+        
+    def add_frame_and_detections(self, 
+                                frame: np.ndarray, 
+                                detections: List[Dict[str, Any]], 
+                                frame_idx: int) -> np.ndarray:
+        """
+        Add frame to buffer and process detections (det-sam2 pattern)
+        
+        Args:
+            frame: Input frame (BGR)
+            detections: List of detections with 'box' key
+            frame_idx: Global frame index
+            
+        Returns:
+            Mask for current frame
+        """
+        # Add frame to buffer
+        self.frame_buffer.append({
+            'frame': frame,
+            'frame_idx': frame_idx,
+            'detections': detections
+        })
+        
+        # Process when buffer is full or when we have detections
+        if len(self.frame_buffer) >= self.frame_buffer_size or detections:
+            return self._process_buffer()
+        else:
+            # For frames without detections, still try to propagate if we have existing objects
+            if self.inference_state is not None and self.object_ids:
+                return self._propagate_existing_objects()
+            else:
+                # Return empty mask if no processing yet
+                return np.zeros((frame.shape[0], frame.shape[1]), dtype=np.uint8)
+    
+    def _process_buffer(self) -> np.ndarray:
+        """Process current frame buffer (adapted det-sam2 approach)"""
+        if not self.frame_buffer:
+            return np.zeros((480, 640), dtype=np.uint8)
+            
+        try:
+            # Create temporary directory for frames (current SAM2 API requirement)
+            self._create_temp_frames()
+            
+            # Initialize or update SAM2 state
+            if self.inference_state is None:
+                # First time: initialize state with temp directory
+                self.inference_state = self.predictor.init_state(
+                    video_path=self.temp_dir,
+                    offload_video_to_cpu=self.memory_offload,
+                    offload_state_to_cpu=self.memory_offload
+                )
+                print(f"   Initialized SAM2 state with {len(self.frame_buffer)} frames")
+            else:
+                # Subsequent times: we need to reinitialize since current SAM2 lacks update_state
+                # This is the key difference from det-sam2 reference
+                self._cleanup_temp_frames()
+                self._create_temp_frames()
+                self.inference_state = self.predictor.init_state(
+                    video_path=self.temp_dir,
+                    offload_video_to_cpu=self.memory_offload,
+                    offload_state_to_cpu=self.memory_offload
+                )
+                print(f"   Reinitialized SAM2 state with {len(self.frame_buffer)} frames")
+            
+            # Add detections as prompts (standard SAM2 API)
+            self._add_detection_prompts()
+            
+            # Get masks via propagation
+            masks = self._get_current_masks()
+            
+            # Clean up old frames to prevent memory accumulation
+            self._cleanup_old_frames()
+            
+            return masks
+            
+        except Exception as e:
+            print(f"   Warning: Buffer processing failed: {e}")
+            return np.zeros((480, 640), dtype=np.uint8)
+    
+    def _create_temp_frames(self):
+        """Create temporary directory with frame images for SAM2"""
+        if self.temp_dir:
+            self._cleanup_temp_frames()
+            
+        self.temp_dir = tempfile.mkdtemp(prefix='sam2_streaming_')
+        
+        for i, buffer_item in enumerate(self.frame_buffer):
+            frame = buffer_item['frame']
+            # Convert BGR to RGB for SAM2
+            frame_rgb = cv2.cvtColor(frame, cv2.COLOR_BGR2RGB)
+            
+            # Save as JPEG (SAM2 expects JPEG images in directory)
+            frame_path = os.path.join(self.temp_dir, f"{i:05d}.jpg")
+            cv2.imwrite(frame_path, cv2.cvtColor(frame_rgb, cv2.COLOR_RGB2BGR))
+    
+    def _add_detection_prompts(self):
+        """Add detection boxes as prompts to SAM2 (standard API)"""
+        for buffer_idx, buffer_item in enumerate(self.frame_buffer):
+            detections = buffer_item.get('detections', [])
+            
+            for det_idx, detection in enumerate(detections):
+                box = detection['box']  # [x1, y1, x2, y2]
+                
+                # Use standard SAM2 API
+                try:
+                    _, out_obj_ids, out_mask_logits = self.predictor.add_new_points_or_box(
+                        inference_state=self.inference_state,
+                        frame_idx=buffer_idx,  # Frame index within buffer
+                        obj_id=det_idx,  # Simple object ID
+                        box=np.array(box, dtype=np.float32)
+                    )
+                    
+                    # Track object IDs
+                    if det_idx not in self.object_ids:
+                        self.object_ids.append(det_idx)
+                        
+                except Exception as e:
+                    print(f"   Warning: Failed to add detection: {e}")
+                    continue
+    
+    def _get_current_masks(self) -> np.ndarray:
+        """Get masks for current frame via propagation"""
+        if not self.object_ids:
+            # No objects to track
+            frame_shape = self.frame_buffer[-1]['frame'].shape
+            return np.zeros((frame_shape[0], frame_shape[1]), dtype=np.uint8)
+            
+        try:
+            # Use SAM2's propagate_in_video (standard API)
+            latest_frame_idx = len(self.frame_buffer) - 1
+            masks_for_frame = []
+            
+            for out_frame_idx, out_obj_ids, out_mask_logits in self.predictor.propagate_in_video(
+                self.inference_state,
+                start_frame_idx=latest_frame_idx,
+                max_frame_num_to_track=1,  # Just current frame
+                reverse=False
+            ):
+                if out_frame_idx == latest_frame_idx:
+                    # Combine all object masks
+                    if len(out_mask_logits) > 0:
+                        combined_mask = None
+                        for mask_logit in out_mask_logits:
+                            mask = (mask_logit > 0.0).cpu().numpy()
+                            if combined_mask is None:
+                                combined_mask = mask.astype(bool)
+                            else:
+                                combined_mask = combined_mask | mask.astype(bool)
+                        
+                        return (combined_mask * 255).astype(np.uint8)
+            
+            # If no masks found, return empty
+            frame_shape = self.frame_buffer[-1]['frame'].shape
+            return np.zeros((frame_shape[0], frame_shape[1]), dtype=np.uint8)
+            
+        except Exception as e:
+            print(f"   Warning: Mask propagation failed: {e}")
+            frame_shape = self.frame_buffer[-1]['frame'].shape
+            return np.zeros((frame_shape[0], frame_shape[1]), dtype=np.uint8)
+    
+    def _propagate_existing_objects(self) -> np.ndarray:
+        """Propagate existing objects without adding new detections"""
+        if not self.object_ids or not self.frame_buffer:
+            frame_shape = self.frame_buffer[-1]['frame'].shape if self.frame_buffer else (480, 640)
+            return np.zeros((frame_shape[0], frame_shape[1]), dtype=np.uint8)
+            
+        try:
+            # Update temp frames with current buffer
+            self._create_temp_frames()
+            
+            # Reinitialize state (since we can't incrementally update)
+            self.inference_state = self.predictor.init_state(
+                video_path=self.temp_dir,
+                offload_video_to_cpu=self.memory_offload,
+                offload_state_to_cpu=self.memory_offload
+            )
+            
+            # Re-add all previous detections from buffer
+            for buffer_idx, buffer_item in enumerate(self.frame_buffer):
+                detections = buffer_item.get('detections', [])
+                if detections:  # Only add frames that had detections
+                    for det_idx, detection in enumerate(detections):
+                        box = detection['box']
+                        try:
+                            self.predictor.add_new_points_or_box(
+                                inference_state=self.inference_state,
+                                frame_idx=buffer_idx,
+                                obj_id=det_idx,
+                                box=np.array(box, dtype=np.float32)
+                            )
+                        except Exception as e:
+                            print(f"   Warning: Failed to re-add detection: {e}")
+            
+            # Get masks for latest frame
+            latest_frame_idx = len(self.frame_buffer) - 1
+            for out_frame_idx, out_obj_ids, out_mask_logits in self.predictor.propagate_in_video(
+                self.inference_state,
+                start_frame_idx=latest_frame_idx,
+                max_frame_num_to_track=1,
+                reverse=False
+            ):
+                if out_frame_idx == latest_frame_idx and len(out_mask_logits) > 0:
+                    combined_mask = None
+                    for mask_logit in out_mask_logits:
+                        mask = (mask_logit > 0.0).cpu().numpy()
+                        if combined_mask is None:
+                            combined_mask = mask.astype(bool)
+                        else:
+                            combined_mask = combined_mask | mask.astype(bool)
+                    
+                    return (combined_mask * 255).astype(np.uint8)
+            
+            # If no masks, return empty
+            frame_shape = self.frame_buffer[-1]['frame'].shape
+            return np.zeros((frame_shape[0], frame_shape[1]), dtype=np.uint8)
+            
+        except Exception as e:
+            print(f"   Warning: Object propagation failed: {e}")
+            frame_shape = self.frame_buffer[-1]['frame'].shape
+            return np.zeros((frame_shape[0], frame_shape[1]), dtype=np.uint8)
+            
+        except Exception as e:
+            print(f"   Warning: Mask propagation failed: {e}")
+            frame_shape = self.frame_buffer[-1]['frame'].shape
+            return np.zeros((frame_shape[0], frame_shape[1]), dtype=np.uint8)
+    
+    def _cleanup_old_frames(self):
+        """Clean up old frames from buffer (det-sam2 pattern)"""
+        # Keep only recent frames to prevent memory accumulation
+        if len(self.frame_buffer) > self.frame_buffer_size:
+            self.frame_buffer = self.frame_buffer[-self.frame_buffer_size:]
+            
+        # Periodic GPU memory cleanup
+        if torch.cuda.is_available():
+            torch.cuda.empty_cache()
+        gc.collect()
+    
+    def _cleanup_temp_frames(self):
+        """Clean up temporary frame directory"""
+        if self.temp_dir and os.path.exists(self.temp_dir):
+            import shutil
+            shutil.rmtree(self.temp_dir)
+            self.temp_dir = None
+    
+    def cleanup(self):
+        """Clean up all resources"""
+        self._cleanup_temp_frames()
+        self.frame_buffer.clear()
+        self.object_ids.clear()
+        
+        if torch.cuda.is_available():
+            torch.cuda.empty_cache()
+            torch.cuda.synchronize()
+        gc.collect()
+        
+        print("🧹 Simple SAM2 streaming processor cleaned up")
+        
+    def apply_mask_to_frame(self, 
+                          frame: np.ndarray, 
+                          mask: np.ndarray, 
+                          output_format: str = "alpha",
+                          background_color: tuple = (0, 255, 0)) -> np.ndarray:
+        """
+        Apply mask to frame with specified output format (matches chunked implementation)
+        
+        Args:
+            frame: Input frame (BGR)
+            mask: Binary mask (0-255 or boolean)
+            output_format: "alpha" or "greenscreen" 
+            background_color: RGB background color for greenscreen mode
+            
+        Returns:
+            Processed frame
+        """
+        if mask is None:
+            return frame
+        
+        # Ensure mask is 2D (handle 3D masks properly)
+        if mask.ndim == 3:
+            mask = mask.squeeze()
+        
+        # Resize mask to match frame if needed (use INTER_NEAREST for binary masks)
+        if mask.shape[:2] != frame.shape[:2]:
+            import cv2
+            # Convert to uint8 for resizing, then back to bool
+            if mask.dtype == bool:
+                mask_uint8 = mask.astype(np.uint8) * 255
+            else:
+                mask_uint8 = mask.astype(np.uint8)
+            
+            mask_resized = cv2.resize(mask_uint8, 
+                                    (frame.shape[1], frame.shape[0]), 
+                                    interpolation=cv2.INTER_NEAREST)
+            mask = mask_resized.astype(bool) if mask.dtype == bool else mask_resized
+        
+        if output_format == "alpha":
+            # Create RGBA output (matches chunked implementation)
+            output = np.zeros((frame.shape[0], frame.shape[1], 4), dtype=np.uint8)
+            output[:, :, :3] = frame
+            if mask.dtype == bool:
+                output[:, :, 3] = mask.astype(np.uint8) * 255
+            else:
+                output[:, :, 3] = mask.astype(np.uint8)
+            return output
+        
+        elif output_format == "greenscreen":
+            # Create RGB output with background (matches chunked implementation)
+            output = np.full_like(frame, background_color, dtype=np.uint8)
+            if mask.dtype == bool:
+                output[mask] = frame[mask]
+            else:
+                mask_bool = mask.astype(bool)
+                output[mask_bool] = frame[mask_bool]
+            return output
+        
+        else:
+            raise ValueError(f"Unsupported output format: {output_format}. Use 'alpha' or 'greenscreen'")
+            
+    def get_memory_usage(self) -> Dict[str, float]:
+        """
+        Get current memory usage statistics
+        
+        Returns:
+            Dictionary with memory usage info
+        """
+        stats = {}
+        
+        if torch.cuda.is_available():
+            # GPU memory stats
+            stats['cuda_allocated_gb'] = torch.cuda.memory_allocated() / (1024**3)
+            stats['cuda_reserved_gb'] = torch.cuda.memory_reserved() / (1024**3)
+            stats['cuda_max_allocated_gb'] = torch.cuda.max_memory_allocated() / (1024**3)
+            
+        return stats

vr180_streaming/streaming_processor.py

@@ -15,7 +15,7 @@ import warnings
 from .frame_reader import StreamingFrameReader
 from .frame_writer import StreamingFrameWriter
 from .stereo_manager import StereoConsistencyManager
-from .sam2_streaming import SAM2StreamingProcessor
+from .sam2_streaming_simple import SAM2StreamingProcessor
 from .detector import PersonDetector
 from .config import StreamingConfig
 
@@ -102,25 +102,17 @@ class VR180StreamingProcessor:
             self.initialize()
             self.start_time = time.time()
             
-            # Initialize SAM2 states for both eyes
+            # Simple SAM2 initialization (no complex state management needed)
-            print("🎯 Initializing SAM2 streaming states...")
+            print("🎯 SAM2 streaming processor ready...")
-            left_state = self.sam2_processor.init_state(
-                self.config.input.video_path,
-                eye='left'
-            )
-            right_state = self.sam2_processor.init_state(
-                self.config.input.video_path,
-                eye='right'
-            )
             
             # Process first frame to establish detections
             print("🔍 Processing first frame for initial detection...")
-            if not self._initialize_tracking(left_state, right_state):
+            if not self._initialize_tracking():
                 raise RuntimeError("Failed to initialize tracking - no persons detected")
                 
             # Main streaming loop
             print("\n🎬 Starting streaming processing loop...")
-            self._streaming_loop(left_state, right_state)
+            self._streaming_loop()
             
         except KeyboardInterrupt:
             print("\n⚠️  Processing interrupted by user")
@@ -134,7 +126,7 @@ class VR180StreamingProcessor:
         finally:
             self._finalize()
             
-    def _initialize_tracking(self, left_state: Dict, right_state: Dict) -> bool:
+    def _initialize_tracking(self) -> bool:
         """Initialize tracking with first frame detection"""
         # Read and process first frame
         first_frame = self.frame_reader.read_frame()
@@ -158,19 +150,15 @@ class VR180StreamingProcessor:
             
         print(f"   Detected {len(detections)} person(s) in first frame")
         
-        # Add detections to both eyes
+        # Process with simple SAM2 approach
-        self.sam2_processor.add_detections(left_state, detections, frame_idx=0)
+        left_masks = self.sam2_processor.add_frame_and_detections(left_eye, detections, 0)
         
-        # Transfer detections to slave eye
+        # Transfer detections to right eye
         transferred_detections = self.stereo_manager.transfer_detections(
             detections, 
             'left_to_right' if self.stereo_manager.master_eye == 'left' else 'right_to_left'
         )
-        self.sam2_processor.add_detections(right_state, transferred_detections, frame_idx=0)
+        right_masks = self.sam2_processor.add_frame_and_detections(right_eye, transferred_detections, 0)
-        
-        # Process and write first frame
-        left_masks = self.sam2_processor._propagate_single_frame(left_state, left_eye, 0)
-        right_masks = self.sam2_processor._propagate_single_frame(right_state, right_eye, 0)
         
         # Apply masks and write
         processed_frame = self._apply_masks_to_frame(first_frame, left_masks, right_masks)
@@ -179,7 +167,7 @@ class VR180StreamingProcessor:
         self.frames_processed = 1
         return True
         
-    def _streaming_loop(self, left_state: Dict, right_state: Dict) -> None:
+    def _streaming_loop(self) -> None:
         """Main streaming processing loop"""
         frame_times = []
         last_log_time = time.time()
@@ -195,23 +183,36 @@ class VR180StreamingProcessor:
             # Split into eyes
             left_eye, right_eye = self.stereo_manager.split_frame(frame)
             
-            # Propagate masks for both eyes
+            # Check if we need to run detection for continuous correction
-            left_masks, right_masks = self.sam2_processor.propagate_frame_pair(
+            detections = []
-                left_state, right_state, left_eye, right_eye, frame_idx
+            if (self.config.matting.continuous_correction and 
+                frame_idx % self.config.matting.correction_interval == 0):
+                print(f"\n🔄 Running YOLO detection for correction at frame {frame_idx}")
+                master_eye = left_eye if self.stereo_manager.master_eye == 'left' else right_eye
+                detections = self.detector.detect_persons(master_eye)
+                if detections:
+                    print(f"   Detected {len(detections)} person(s) for correction")
+                else:
+                    print(f"   No persons detected for correction")
+            
+            # Process frames (with detections if this is a correction frame)
+            left_masks = self.sam2_processor.add_frame_and_detections(left_eye, detections, frame_idx)
+            
+            # For right eye, transfer detections if we have them
+            if detections:
+                transferred_detections = self.stereo_manager.transfer_detections(
+                    detections, 
+                    'left_to_right' if self.stereo_manager.master_eye == 'left' else 'right_to_left'
                 )
+                right_masks = self.sam2_processor.add_frame_and_detections(right_eye, transferred_detections, frame_idx)
+            else:
+                right_masks = self.sam2_processor.add_frame_and_detections(right_eye, [], frame_idx)
             
             # Validate stereo consistency
             right_masks = self.stereo_manager.validate_masks(
                 left_masks, right_masks, frame_idx
             )
             
-            # Apply continuous correction if enabled
-            if (self.config.matting.continuous_correction and 
-                frame_idx % self.config.matting.correction_interval == 0):
-                self._apply_continuous_correction(
-                    left_state, right_state, left_eye, right_eye, frame_idx
-                )
-                
             # Apply masks and write frame
             processed_frame = self._apply_masks_to_frame(frame, left_masks, right_masks)
             self.frame_writer.write_frame(processed_frame)
@@ -282,21 +283,20 @@ class VR180StreamingProcessor:
             return left_processed
             
     def _apply_continuous_correction(self,
-                                   left_state: Dict,
-                                   right_state: Dict,
                                    left_eye: np.ndarray,
                                    right_eye: np.ndarray,
                                    frame_idx: int) -> None:
         """Apply continuous correction to maintain tracking accuracy"""
         print(f"\n🔄 Applying continuous correction at frame {frame_idx}")
         
-        # Detect on master eye
+        # Detect on master eye and add fresh detections
         master_eye = left_eye if self.stereo_manager.master_eye == 'left' else right_eye
-        master_state = left_state if self.stereo_manager.master_eye == 'left' else right_state
+        detections = self.detector.detect_persons(master_eye)
         
-        self.sam2_processor.apply_continuous_correction(
+        if detections:
-            master_state, master_eye, frame_idx, self.detector
+            print(f"   Adding {len(detections)} fresh detection(s) for correction")
-        )
+            # Add fresh detections to help correct drift
+            self.sam2_processor.add_frame_and_detections(master_eye, detections, frame_idx)
         
         # Transfer corrections to slave eye
         # Note: This is simplified - actual implementation would transfer the refined prompts

vr180_streaming/timeout_init.py

@@ -0,0 +1,45 @@
+"""
+Timeout wrapper for SAM2 initialization to prevent hanging
+"""
+
+import signal
+import functools
+from typing import Any, Callable
+
+
+class TimeoutError(Exception):
+    pass
+
+
+def timeout(seconds: int = 120):
+    """Decorator to add timeout to function calls"""
+    def decorator(func: Callable) -> Callable:
+        @functools.wraps(func)
+        def wrapper(*args, **kwargs) -> Any:
+            # Define signal handler
+            def timeout_handler(signum, frame):
+                raise TimeoutError(f"Function {func.__name__} timed out after {seconds} seconds")
+            
+            # Set signal handler
+            old_handler = signal.signal(signal.SIGALRM, timeout_handler)
+            signal.alarm(seconds)
+            
+            try:
+                result = func(*args, **kwargs)
+            finally:
+                # Restore old handler
+                signal.alarm(0)
+                signal.signal(signal.SIGALRM, old_handler)
+                
+            return result
+        return wrapper
+    return decorator
+
+
+@timeout(120)  # 2 minute timeout
+def safe_init_state(predictor, video_path: str, **kwargs) -> Any:
+    """Safely initialize SAM2 state with timeout"""
+    return predictor.init_state(
+        video_path=video_path,
+        **kwargs
+    )