title: Google Speech API unable to find a file on Google Storage: error 404
body: <p>I am trying to convert audio clips [.flac format] to text using the google cloud speech api.I am using the python client library for making requests and  have a bucket on the GCP with a flat directory structure which is used to store the audio files and make asynchronous requests.Below is the python code for making requests</p>
  
  <pre><code>            from google.cloud import storage
              from google.cloud import speech
              from google.cloud.speech import enums
              from google.cloud.speech import types
              import json
  
              def AudioAnalyze(bucket_name):
                  storage_client = storage.Client()
                  speech_client = speech.SpeechClient()
                  bucket = storage_client.get_bucket(bucket_name)
                  bucket_contents = bucket.list_blobs()
                  urls = []
                  audio_content=[]
                  for i in bucket_contents:
                          urls.append("gs://"+i.bucket.name+"/"+i.public_url.split("/")[-1])
                  for gcs_uri in urls:
                      audio = types.RecognitionAudio(uri=gcs_uri)
                      config = types.RecognitionConfig(
                      encoding=enums.RecognitionConfig.AudioEncoding.FLAC,
                      sample_rate_hertz=44100,
                      language_code='en-US')
                      operation = speech_client.long_running_recognize(config,audio)
                      print(gcs_uri)
                      print('Waiting for operation to complete...')
                      response = operation.result(timeout=450)
                      speech2text=[]
                      for result in response.results:
                          for alternative in result.alternatives:
                              speech2text.append(alternative.transcript)
                      ad_content=" ".join(speech2text)
                      audio_content.append(ad_content)
                  with open("path/to a/json file/file.json","w") as f:
                      json.dump(audio_content,f)
  
  
              if __name__=="__main__":
                      AudioAnalyze("adsaudiocontent")
  </code></pre>
  
  <p>I am encountering an error: <strong>google.api_core.exceptions.NotFound: 404 Requested entity was not found</strong> on a particular file present in the bucket while all the other files are being processed properly.The audio files have gone through a similar processing pipeline.The audio files are <strong>available on my public bucket:adsaudiocontent</strong> so that you can replicate the error.For Additional details here is the traceback.</p>
  
  <pre><code>                Traceback (most recent call last):
                    File "/home/pythonuser1/.virtualenvs/virtual_env/lib/python3.5/site-packages/google/api_core/grpc_helpers.py", line 54, in error_remapped_callable
                      return callable_(*args, **kwargs)
                    File "/home/pythonuser1/.virtualenvs/virtual_env/lib/python3.5/site-packages/grpc/_channel.py", line 487, in __call__
                      return _end_unary_response_blocking(state, call, False, deadline)
                    File "/home/pythonuser1/.virtualenvs/virtual_env/lib/python3.5/site-packages/grpc/_channel.py", line 437, in _end_unary_response_blocking
                      raise _Rendezvous(state, None, None, deadline)
                  grpc._channel._Rendezvous: &lt;_Rendezvous of RPC that terminated with (StatusCode.NOT_FOUND, Requested entity was not found.)&gt;
                  The above exception was the direct cause of the following exception:
                  Traceback (most recent call last):
                    File "audioanalyze.py", line 40, in &lt;module&gt;
                      AudioAnalyze("adsaudiocontent")
                    File "audioanalyze.py", line 25, in AudioAnalyze
                      operation = speech_client.long_running_recognize(config,audio)
                    File "/home/pythonuser1/.virtualenvs/virtual_env/lib/python3.5/site-packages/google/cloud/speech_v1/gapic/speech_client.py", line 264, in long_running_recognize
                      request, retry=retry, timeout=timeout, metadata=metadata)
                    File "/home/pythonuser1/.virtualenvs/virtual_env/lib/python3.5/site-packages/google/api_core/gapic_v1/method.py", line 139, in __call__
                      return wrapped_func(*args, **kwargs)
                    File "/home/pythonuser1/.virtualenvs/virtual_env/lib/python3.5/site-packages/google/api_core/retry.py", line 260, in retry_wrapped_func
                      on_error=on_error,
                    File "/home/pythonuser1/.virtualenvs/virtual_env/lib/python3.5/site-packages/google/api_core/retry.py", line 177, in retry_target
                      return target()
                    File "/home/pythonuser1/.virtualenvs/virtual_env/lib/python3.5/site-packages/google/api_core/timeout.py", line 206, in func_with_timeout
                      return func(*args, **kwargs)
                    File "/home/pythonuser1/.virtualenvs/virtual_env/lib/python3.5/site-packages/google/api_core/grpc_helpers.py", line 56, in error_remapped_callable
                      six.raise_from(exceptions.from_grpc_error(exc), exc)
                    File "&lt;string&gt;", line 3, in raise_from
                  google.api_core.exceptions.NotFound: 404 Requested entity was not found.
  </code></pre>