Update app.py

app.py

@@ -130,6 +130,7 @@ def process_video(radio, video, target_language, has_closeup_face):
         except subprocess.CalledProcessError as e:
             if "Face not detected! Ensure the video contains a face in all the frames." in str(e.stderr):
                 # Fallback to FFmpeg merge
+                gr.Warning("Wav2lip didn't detect a face. Please try again with the option disabled.")
                 cmd = f"ffmpeg -i {video_path} -i {run_uuid}_output_synth.wav -c:v copy -c:a aac -strict experimental -map 0:v:0 -map 1:a:0 {run_uuid}_output_video.mp4"
                 subprocess.run(cmd, shell=True)
     else: