Update app.py

app.py

@@ -42,23 +42,21 @@ st.title("Image to Video")
 
 file_name = st.file_uploader("Upload an image")
 
-# if file_name is None:
-# 	return
-
-col1, col2 = st.columns(2)
-image = load_image(image=file_name.name)
-col1.image(image, use_container_width=True)
-
-video = pipe(
-    prompt=prompt,
-    image=image,
-    num_videos_per_prompt=1,
-    num_inference_steps=50,
-    num_frames=49,
-    guidance_scale=6,
-    generator=torch.Generator(device="cuda").manual_seed(42),
-).frames[0]
-
-col2.video(video, use_container_width=True)
-
-export_to_video(video, "output.mp4", fps=8)
+if file_name is not None:
+    col1, col2 = st.columns(2)
+    image = load_image(image=file_name.name)
+    col1.image(image, use_container_width=True)
+
+    video = pipe(
+        prompt=prompt,
+        image=image,
+        num_videos_per_prompt=1,
+        num_inference_steps=50,
+        num_frames=49,
+        guidance_scale=6,
+        generator=torch.Generator(device="cuda").manual_seed(42),
+    ).frames[0]
+
+    col2.video(video, use_container_width=True)
+
+    export_to_video(video, "output.mp4", fps=8)