fix app.py

app.py

@@ -9,8 +9,8 @@ from denoisers.SpectralGating import SpectralGating
 def denoising_transform(audio):
     src_path = Path(__file__).parent.resolve() / Path("cache_wav/original/{}.wav".format(str(uuid.uuid4())))
     tgt_path = Path(__file__).parent.resolve() / Path("cache_wav/denoised/{}.wav".format(str(uuid.uuid4())))
-    src_path.parent.mkdir(exist_ok=True)
-    tgt_path.parent.mkdir(exist_ok=True)
+    src_path.parent.mkdir(exist_ok=True, parents=True)
+    tgt_path.parent.mkdir(exist_ok=True, parents=True)
     (ffmpeg.input(audio)
             .output(src_path, acodec='pcm_s16le', ac=1, ar=22050)
             .run()