Update app.py

app.py

@@ -34,7 +34,11 @@ def text_to_video(text, voice, rate, pitch, bg_media, video_width, video_height)
         return None, warning
 
     audio_clip = AudioFileClip(audio)
-    
+
+    # Check if bg_media is None
+    if bg_media is None:
+        return None, gr.Warning("Please upload a background image or video.")
+
     # Create background video or image
     if bg_media.endswith('.mp4'):
         bg_clip = VideoFileClip(bg_media).resize(newsize=(video_width, video_height)).set_duration(audio_clip.duration)
@@ -85,4 +89,4 @@ async def create_demo():
 # Run the application
 if __name__ == "__main__":
     demo = asyncio.run(create_demo())
-    demo.launch()
+    demo.launch(share=True)  # Set share=True for public link