Initial CutScript release - Open-source AI-powered text-based video editor

CutScript is a local-first, Descript-like video editor where you edit video by editing text.
Delete a word from the transcript and it's cut from the video.

Features:
- Word-level transcription with WhisperX
- Text-based video editing with undo/redo
- AI filler word removal (Ollama/OpenAI/Claude)
- AI clip creation for shorts
- Waveform timeline with virtualized transcript
- FFmpeg stream-copy (fast) and re-encode (4K) export
- Caption burn-in and sidecar SRT generation
- Studio Sound audio enhancement (DeepFilterNet)
- Keyboard shortcuts (J/K/L, Space, Delete, Ctrl+Z/S/E)
- Encrypted API key storage
- Project save/load (.aive files)

Architecture:
- Electron + React + Tailwind (frontend)
- FastAPI + Python (backend)
- WhisperX for transcription
- FFmpeg for video processing
- Multi-provider AI support

Performance optimizations:
- RAF-throttled time updates
- Zustand selectors for granular subscriptions
- Dual-canvas waveform rendering
- Virtualized transcript with react-virtuoso

Built on top of DataAnts-AI/VideoTranscriber, completely rewritten as a desktop application.

License: MIT

backend/services/background_removal.py

@@ -0,0 +1,59 @@
+"""
+AI background removal (Phase 5 - future).
+Uses MediaPipe or Robust Video Matting for person segmentation.
+Export-only -- no real-time preview.
+"""
+
+import logging
+
+logger = logging.getLogger(__name__)
+
+# Placeholder for Phase 5 implementation
+# Will use mediapipe or rvm for segmentation at export time
+
+MEDIAPIPE_AVAILABLE = False
+RVM_AVAILABLE = False
+
+try:
+    import mediapipe as mp
+    MEDIAPIPE_AVAILABLE = True
+except ImportError:
+    pass
+
+try:
+    pass  # rvm import would go here
+except ImportError:
+    pass
+
+
+def is_available() -> bool:
+    return MEDIAPIPE_AVAILABLE or RVM_AVAILABLE
+
+
+def remove_background_on_export(
+    input_path: str,
+    output_path: str,
+    replacement: str = "blur",
+    replacement_value: str = "",
+) -> str:
+    """
+    Process video frame-by-frame to remove/replace background.
+    Only runs during export (not real-time).
+
+    Args:
+        input_path: source video
+        output_path: destination
+        replacement: 'blur', 'color', 'image', or 'video'
+        replacement_value: hex color, image path, or video path
+
+    Returns:
+        output_path
+    """
+    if not is_available():
+        raise RuntimeError(
+            "Background removal requires mediapipe or robust-video-matting. "
+            "Install with: pip install mediapipe"
+        )
+
+    # Phase 5 implementation will go here
+    raise NotImplementedError("Background removal is planned for Phase 5")