Error in google cloud speech api synchronous speech recognition docs

Question

I copied the information from the google cloud speech api synchronous speech recognition docs at https://cloud.google.com/speech/docs/sync-recognize into my code, but I when I ran the code I received a lot of errors:

Traceback (most recent call last):
  File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/google/gax/retry.py", line 121, in inner
    return to_call(*args)
  File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/google/gax/retry.py", line 68, in inner
    return a_func(*updated_args, **kwargs)
  File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/grpc/_channel.py", line 487, in __call__
    return _end_unary_response_blocking(state, call, False, deadline)
  File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/grpc/_channel.py", line 437, in _end_unary_response_blocking
    raise _Rendezvous(state, None, None, deadline)
grpc._channel._Rendezvous: <_Rendezvous of RPC that terminated with (StatusCode.INVALID_ARGUMENT, sample_rate_hertz (16000) in RecognitionConfig must either be omitted or match the value in the WAV header ( 44100).)>

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "TESTINGAUDIO.py", line 27, in <module>
    print (transcribe_file("output.wav"))
  File "TESTINGAUDIO.py", line 20, in transcribe_file
    response = client.recognize(config, audio)
  File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/google/cloud/gapic/speech/v1/speech_client.py", line 201, in recognize
    return self._recognize(request, options)
  File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/google/gax/api_callable.py", line 452, in inner
    return api_caller(api_call, this_settings, request)
  File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/google/gax/api_callable.py", line 438, in base_caller
    return api_call(*args)
  File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/google/gax/api_callable.py", line 376, in inner
    return a_func(*args, **kwargs)
  File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/google/gax/retry.py", line 127, in inner
    ' classified as transient', exception)
google.gax.errors.RetryError: RetryError(Exception occurred in retry method that was not classified as transient, caused by <_Rendezvous of RPC that terminated with (StatusCode.INVALID_ARGUMENT, sample_rate_hertz (16000) in RecognitionConfig must either be omitted or match the value in the WAV header ( 44100).)>)

Here is my code:

import os
import io
def transcribe_file(speech_file):
    """Transcribe the given audio file."""
    from google.cloud import speech
    from google.cloud.speech import enums
    from google.cloud.speech import types
    client = speech.SpeechClient()

    with io.open(speech_file, 'rb') as audio_file:
        content = audio_file.read()

    audio = types.RecognitionAudio(content=content)
    config = types.RecognitionConfig(
        encoding=enums.RecognitionConfig.AudioEncoding.LINEAR16,
        sample_rate_hertz=16000,
        language_code='en-US')

    response = client.recognize(config, audio)
    # Each result is for a consecutive portion of the audio. Iterate through
    # them to get the transcripts for the entire audio file.
    for result in response.results:
        # The first alternative is the most likely one for this portion.
        print('Transcript: {}'.format(result.alternatives[0].transcript))

print (transcribe_file("output.wav"))

Can someone please help me fix this error?

Here is the second batch of errors after taking sorak's suggestion:

Traceback (most recent call last):
  File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/google/gax/retry.py", line 121, in inner
    return to_call(*args)
  File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/google/gax/retry.py", line 68, in inner
    return a_func(*updated_args, **kwargs)
  File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/grpc/_channel.py", line 487, in __call__
    return _end_unary_response_blocking(state, call, False, deadline)
  File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/grpc/_channel.py", line 437, in _end_unary_response_blocking
    raise _Rendezvous(state, None, None, deadline)
grpc._channel._Rendezvous: <_Rendezvous of RPC that terminated with (StatusCode.INVALID_ARGUMENT, Must use single channel (mono) audio, but WAV header indicates 2 channels.)>

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "TESTINGAUDIO.py", line 26, in <module>
    print (transcribe_file("output.wav"))
  File "TESTINGAUDIO.py", line 20, in transcribe_file
    response = client.recognize(config, audio)
  File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/google/cloud/gapic/speech/v1/speech_client.py", line 201, in recognize
    return self._recognize(request, options)
  File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/google/gax/api_callable.py", line 452, in inner
    return api_caller(api_call, this_settings, request)
  File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/google/gax/api_callable.py", line 438, in base_caller
    return api_call(*args)
  File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/google/gax/api_callable.py", line 376, in inner
    return a_func(*args, **kwargs)
  File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/google/gax/retry.py", line 127, in inner
    ' classified as transient', exception)
google.gax.errors.RetryError: RetryError(Exception occurred in retry method that was not classified as transient, caused by <_Rendezvous of RPC that terminated with (StatusCode.INVALID_ARGUMENT, Must use single channel (mono) audio, but WAV header indicates 2 channels.)>)

Answer 1

The error message seems to be complaining about:

sample_rate_hertz=16000

because that is specifying a sample rate which is in conflict with the standard wav sample rate of 44100. It says that this value

must either be omitted or match the value in the WAV header

... so what happens if you just remove that line?