python - 服务不可用 : 503 failed to connect to all addresses during attempt to recognize audio

Question

我正在尝试运行以下代码来识别音频文件。该代码只是来自不同官方示例的汇编。但它不起作用。

import os
from google.cloud import speech
from google.cloud.speech import enums
from google.cloud.speech import types
from google.oauth2 import service_account
import io

def transcribe_file(speech_file):
    client = speech.SpeechClient(credentials=credentials)

    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='ru-RU')

    response = client.long_running_recognize(config, audio)
    for result in response.results:
        print(u'Transcript: {}'.format(result.alternatives[0].transcript))

audio_folder_path = 'data_wav'
all_audios = os.listdir(audio_folder_path)

file_name = os.path.join(audio_folder_path, all_audios[0])

credentials = service_account.Credentials.from_service_account_file("google_aut.json")

transcribe_file(file_name)

我在 Windows 10 下使用 Anaconda 4.7.12 for Python 3.7，google-cloud-speech v 1.2.0，google-auth v 1.6.3

我每次得到的错误是

_Rendezvous Traceback (most recent call last) ~\AppData\Local\Continuum\anaconda3\lib\site-packages\google\api_core\grpc_helpers.py in error_remapped_callable(*args, **kwargs) 56 try: ---> 57 return callable_(*args, **kwargs) 58 except grpc.RpcError as exc:

~\AppData\Local\Continuum\anaconda3\lib\site-packages\grpc_channel.py in call(self, request, timeout, metadata, credentials, wait_for_ready, compression) 564 wait_for_ready, compression) --> 565 return _end_unary_response_blocking(state, call, False, None) 566

~\AppData\Local\Continuum\anaconda3\lib\site-packages\grpc_channel.py in _end_unary_response_blocking(state, call, with_call, deadline) 466 else: --> 467 raise _Rendezvous(state, None, None, deadline) 468

_Rendezvous: <_Rendezvous of RPC that terminated with: status = StatusCode.UNAVAILABLE details = "failed to connect to all addresses" debug_error_string = "{"created":"@1569838382.864000000","description":"Failed to pick subchannel","file":"src/core/ext/filters/client_channel/client_channel.cc","file_line":3818,"referenced_errors":[{"created":"@1569838382.863000000","description":"failed to connect to all addresses","file":"src/core/ext/filters/client_channel/lb_policy/pick_first/pick_first.cc","file_line":395,"grpc_status":14}]}" >

The above exception was the direct cause of the following exception:

ServiceUnavailable Traceback (most recent call last) in ----> 1 transcribe_file(file_name)

in transcribe_file(speech_file) 20 21 # [START speech_python_migration_sync_response] ---> 22 response = client.long_running_recognize(config, audio) 23 # [END speech_python_migration_sync_request] 24 # Each result is for a consecutive portion of the audio. Iterate through

~\AppData\Local\Continuum\anaconda3\lib\site-packages\google\cloud\speech_v1\gapic\speech_client.py in long_running_recognize(self, config, audio, retry, timeout, metadata) 339 ) 340 operation = self._inner_api_calls["long_running_recognize"]( --> 341 request, retry=retry, timeout=timeout, metadata=metadata 342 ) 343 return google.api_core.operation.from_gapic(

~\AppData\Local\Continuum\anaconda3\lib\site-packages\google\api_core\gapic_v1\method.py in call(self, *args, **kwargs) 141 kwargs["metadata"] = metadata 142 --> 143 return wrapped_func(*args, **kwargs) 144 145

~\AppData\Local\Continuum\anaconda3\lib\site-packages\google\api_core\retry.py in retry_wrapped_func(*args, **kwargs) 271 sleep_generator, 272 self._deadline, --> 273 on_error=on_error, 274 ) 275

~\AppData\Local\Continuum\anaconda3\lib\site-packages\google\api_core\retry.py in retry_target(target, predicate, sleep_generator, deadline, on_error) 180 for sleep in sleep_generator: 181 try: --> 182 return target() 183 184 # pylint: disable=broad-except

~\AppData\Local\Continuum\anaconda3\lib\site-packages\google\api_core\timeout.py in func_with_timeout(*args, **kwargs) 212 """Wrapped function that adds timeout.""" 213 kwargs["timeout"] = next(timeouts) --> 214 return func(*args, **kwargs) 215 216 return func_with_timeout

~\AppData\Local\Continuum\anaconda3\lib\site-packages\google\api_core\grpc_helpers.py in error_remapped_callable(*args, **kwargs) 57 return callable_(*args, **kwargs) 58 except grpc.RpcError as exc: ---> 59 six.raise_from(exceptions.from_grpc_error(exc), exc) 60 61 return error_remapped_callable

~\AppData\Local\Continuum\anaconda3\lib\site-packages\six.py in raise_from(value, from_value)

ServiceUnavailable: 503 无法连接到所有地址

我该如何解决？

Answer 1

这可能由于凭据而失败。让我们尝试一些事情:

• 确保您的服务帐户 key 是正确的，您应该有这样的内容:

  from google.oauth2 import service_account

  credentials = service_account.Credentials. from_service_account_file('service_account_key.json')

  speech = speech.SpeechClient(credentials=credentials)

  或

  speech = speech_v1.SpeechClient(credentials=credentials)

• 使用范围:

  credentials = service_account.Credentials.from_service_account_file( credentials_json, scopes=['https://www.googleapis.com/auth/cloud-platform'])

  更多信息 here .

• 在此thread是通过为多个请求使用 session 客户端对象的单个实例来解决的。

• 正如 Dustin 所说，这可能是网络问题。更多信息在这里 503 Service Unavailable

如果您设法解决了这个错误，请告诉我们。