limit audio length

app.py

@@ -31,6 +31,9 @@ def process_audio(sampling_rate, waveform):
     if sampling_rate != 16000:
         waveform = librosa.resample(waveform, orig_sr=sampling_rate, target_sr=16000)
 
+    # limit to 30 seconds
+    waveform = waveform[:16000*30]
+
     # make PyTorch tensor
     waveform = torch.tensor(waveform)
     return waveform