minor fixes

adjust.py

@@ -24,7 +24,7 @@ def get_current():
 
 def prepare_output(input_file):
     if input_file is None or not os.path.exists(input_file):
-        return
+        return [None, None, None, None, None]
 
     speakers = get_speakers(input_file)
     adjust_speaker_update = adjust_speaker.update(
@@ -37,10 +37,7 @@ def prepare_output(input_file):
     return [adjust_speaker_update, adjust_audio_update, prev_button_update, next_button_update, adjust_button_update]
 
 
-def get_speakers(input_file):
-    if (input_file == None):
-        return [None, None]
-
+def get_speakers():
     global speaker_to_name
     global speaker_to_sample
 

app.py

@@ -33,7 +33,7 @@ with gr.Blocks() as demo:
         with gr.Column():
             output_video.render()
             output_file.render()
-            output_file.change(prepare_output, inputs=output_file, outputs=[
+            output_file.change(prepare_output, inputs=output_video, outputs=[
                 adjust_speaker, adjust_audio, prev_button, next_button, adjust_button])
         with gr.Column():
             output_transcribe.render()