Add hidden API components at root level to expose /api/predict endpoint

app.py

@@ -871,9 +871,9 @@ with gr.Blocks(title="SAM2 Video (Transformers) - Interactive Segmentation", the
     )
 
 # ============================================================================
-# COMBINED INTERFACE WITH SEPARATE API ENDPOINT
+# COMBINED INTERFACE WITH EXPLICIT API ENDPOINT
 # ============================================================================
-# Create standalone API interface that will be properly exposed
+# Create API interface with explicit endpoint
 api_interface = gr.Interface(
     fn=process_video_api,
     inputs=[
@@ -905,16 +905,36 @@ api_interface = gr.Interface(
         ]
     }
     ```
-    """,
-    api_name="predict"  # This will create /api/predict endpoint
+    """
 )
 
-# Combine with tabs
-combined_demo = gr.TabbedInterface(
-    [demo, api_interface],
-    tab_names=["Interactive UI", "API"],
-    title="SAM2 Video Tracking"
-)
+# Use gr.Blocks to combine both with proper API exposure
+with gr.Blocks(title="SAM2 Video Tracking") as combined_demo:
+    gr.Markdown("# SAM2 Video Tracking")
+    
+    with gr.Tabs():
+        with gr.TabItem("Interactive UI"):
+            demo.render()
+        
+        with gr.TabItem("API"):
+            api_interface.render()
+    
+    # Explicitly expose the API function at root level for external API calls
+    # This creates the /api/predict endpoint
+    api_video_input_hidden = gr.Video(visible=False)
+    api_annotations_input_hidden = gr.Textbox(visible=False)
+    api_checkpoint_input_hidden = gr.Radio(choices=["tiny", "small", "base_plus", "large"], visible=False)
+    api_remove_bg_input_hidden = gr.Checkbox(visible=False)
+    api_output_hidden = gr.Video(visible=False)
+    
+    # This dummy component creates the external API endpoint
+    api_dummy_btn = gr.Button("API", visible=False)
+    api_dummy_btn.click(
+        fn=process_video_api,
+        inputs=[api_video_input_hidden, api_annotations_input_hidden, api_checkpoint_input_hidden, api_remove_bg_input_hidden],
+        outputs=api_output_hidden,
+        api_name="predict"  # This creates /api/predict for external calls
+    )
 
 # Launch with API enabled
 if __name__ == "__main__":