Update app.py

app.py

@@ -11,7 +11,7 @@ subprocess.run([sys.executable, "-m", "pip", "install", "xformers==0.0.32.post2"
 
 # Install video preprocessing dependencies
 subprocess.run([sys.executable, "-m", "pip", "install",
-                "dwpose", "onnxruntime-gpu", "imageio[ffmpeg]", "scikit-image"], check=False)
+                "dwpose", "onnxruntime-gpu", "imageio[ffmpeg]", "scikit-image", "opencv-python-headless"], check=False)
 
 # Reinstall torchaudio to match the torch CUDA version on this space.
 # controlnet_aux or other deps can pull in a CPU-only torchaudio that conflicts