minor fix

app.py

@@ -5,9 +5,18 @@ import gradio as gr
 import os
 
 # Get video & convert it
-inputs_interface = gr.inputs.Video(label="Insert video")
-in_file = ffmpeg.input(inputs_interface).audio
-out_file = ffmpeg.output(in_file, "input.wav", f="wav").run()
+
+
+def video_to_audio(input_video_path, output_audio_path):
+    (
+        ffmpeg.input(input_video_path)
+        .output(output_audio_path, format='wav')
+        .run()
+    )
+
+
+inputs_interface = gr.inputs.Video(label="Insert video").value
+ffmpeg.input(inputs_interface).audio.output("input.wav", format="wav").run()
 
 
 def prepareInput():