fix sort key

pipeline.py

@@ -197,7 +197,7 @@ def transcribe_and_preprocess_audio(input_audio):
 
 def combine_audio_streams(list_of_output_chunks, output_audio):
     list_of_output_chunks = sorted(
-        list_of_output_chunks, key=lambda x: int(x.split("_")[0].split("/")[-1])
+        list_of_output_chunks, key=lambda x: int(os.path.basename(x).split("_")[0])
     )
     input_streams = [ffmpeg.input(chunk) for chunk in list_of_output_chunks]
     concatenated = ffmpeg.concat(*input_streams, v=0, a=1).output(f"{output_audio}")