Update app.py

app.py

@@ -1,11 +1,10 @@
 import numpy as np
 import gradio as gr
+import cv2
 
-def flip_text(x):
-    return x[::-1]
-
-def flip_image(x):
-    return np.fliplr(x)
+def to_black(image):
+    output = cv2.cvtColor(image, cv2.COLOR_BGR2GRAY)
+    return output
 
 with gr.Blocks() as demo:
     gr.Markdown("Flip image or video files using this demo.")
@@ -19,8 +18,8 @@ with gr.Blocks() as demo:
             video_input = gr.Video()
             video_output = gr.Video()
             video_button = gr.Button("Flip")
-    image_button.click(flip_image, inputs=image_input, outputs=image_output)
-    video_button.click(flip_text, inputs=video_input, outputs=video_output)
+    image_button.click(to_black, inputs=image_input, outputs=image_output)
+    video_button.click(to_black, inputs=video_input, outputs=video_output)
 
 demo.launch()