介绍
Python连接华为云接口,实现语音识别功能是一项常见的任务。本文将通过一个实例,来介绍如何使用Python连接华为云接口,实现语音识别功能。在这个实例中,我们将使用华为云的语音识别接口,来识别一段录音中的语音内容。
准备工作
1. 在华为云中创建语音识别服务
在使用华为云的语音识别功能前,我们需要在华为云中创建一个语音识别服务。具体创建步骤如下:
登录华为云控制台。
选择“语音服务” - “语音识别”。
点击“创建语音识别”按钮,输入相关配置信息,完成创建。
2. 安装Python SDK
在Python中使用华为云的语音识别功能,我们需要安装华为云Python SDK。具体安装方法如下:
pip install huaweicloud-sdk-python-vpc
实现语音识别功能
1. 通过华为云API获取token
在使用华为云的语音识别功能前,我们需要通过华为云API获取一个token。获取token的过程如下:
使用阿里云SDK中的AK、SK鉴权,获取token。
向华为云发起POST请求,获取临时token。
以下是获取token的Python代码:
import huaweicloud_sdk
auth = huaweicloud_sdk.Auth()
access_key = 'xxxxxxx'
secret_key = 'xxxxxxxxxxx'
auth.set_access_key(access_key)
auth.set_secret_key(secret_key)
region = 'cn-north-4'
project_id = 'xxxxxxxxxxxxxxxxx'
temporary_token = huaweicloud_sdk.get_temporary_token(auth, project_id, region)
以上代码中需要替换的是:
access_key和secret_key分别是你的华为云账号的access_key和secret_key;
region和project_id分别是你创建的语音识别服务的所在区域和项目ID。
2. 上传录音文件到OBS
在语音识别过程中,我们需要将待识别的录音文件上传到华为云OBS。以下是Python中上传文件到OBS的代码实现:
import huaweicloud_sdk
observatory = huaweicloud_sdk.Observatory()
obs_setting = {
"ak": access_key,
"sk": secret_key,
"project_id": project_id,
"region": region
}
observatory.set_setting(obs_setting)
bucket_name = 'test'
object_key = 'test.mp3'
file_path = '/Users/test.mp3'
observatory.upload_file(bucket_name, object_key, file_path)
以上代码中需要替换的是:
bucket_name是你在OBS中创建的存储桶名称;
object_key是你要上传的文件在存储桶内的对象名称;
file_path是本地要上传的文件路径。
3. 启动语音识别任务
在上传录音文件完成后,我们需要启动一个语音识别任务。以下是Python中启动语音识别任务的代码实现:
import huaweicloud_sdk
asr = huaweicloud_sdk.ASR()
asr_setting = {
"Speech-Codec": "PCM",
"Sample-Rate": "16000",
"Tempo": "long",
"Vad-Mode": "normal",
"Number-of-Channels": "1",
"Body-Language": "zh-CN",
"Codec": "Amr",
"Language": "zh-CN",
"Enable-punctuation": "false",
"Enable-words-free": "false",
"Enable-words-free-dictation": "false",
"Enable-mpu": "false",
"Model": "general",
"Enable-i-pinyin": "true",
"Enable-suffix": "true",
"Enable-composing": "true"
}
asr.set_setting(asr_setting)
url = 'https://cn-north-4.stt.hwcloudspeech.com/v1.0'
result = asr.asr_job_status(id, url, temporary_token['token'])
以上代码中需要替换的是:
id是语音识别任务ID,我们可以在ASR中启动任务后,获取到这个ID;
url是华为云语音识别服务的URL,对于每个服务节点URL是固定的。
4. 获取语音识别结果
在语音识别任务完成后,我们需要获取语音识别结果。以下是Python中获取语音识别结果的代码实现:
import huaweicloud_sdk
url = 'https://cn-north-4.stt.hwcloudspeech.com/v1.0'
result = asr.asr_job_result(id, url, temporary_token['token'])
text = result['result']['hypotheses'][0]['transcript']
print(text)
以上代码会输出我们语音识别的结果。
完整代码
以下是完整Python代码:
import huaweicloud_sdk
auth = huaweicloud_sdk.Auth()
access_key = 'xxxxxxx'
secret_key = 'xxxxxxxxxxx'
auth.set_access_key(access_key)
auth.set_secret_key(secret_key)
region = 'cn-north-4'
project_id = 'xxxxxxxxxxxxxxxxx'
temporary_token = huaweicloud_sdk.get_temporary_token(auth, project_id, region)
observatory = huaweicloud_sdk.Observatory()
obs_setting = {
"ak": access_key,
"sk": secret_key,
"project_id": project_id,
"region": region
}
observatory.set_setting(obs_setting)
bucket_name = 'test'
object_key = 'test.mp3'
file_path = '/Users/test.mp3'
observatory.upload_file(bucket_name, object_key, file_path)
asr = huaweicloud_sdk.ASR()
asr_setting = {
"Speech-Codec": "PCM",
"Sample-Rate": "16000",
"Tempo": "long",
"Vad-Mode": "normal",
"Number-of-Channels": "1",
"Body-Language": "zh-CN",
"Codec": "Amr",
"Language": "zh-CN",
"Enable-punctuation": "false",
"Enable-words-free": "false",
"Enable-words-free-dictation": "false",
"Enable-mpu": "false",
"Model": "general",
"Enable-i-pinyin": "true",
"Enable-suffix": "true",
"Enable-composing": "true"
}
asr.set_setting(asr_setting)
url = 'https://cn-north-4.stt.hwcloudspeech.com/v1.0'
result = asr.asr_job_status(id, url, temporary_token['token'])
result = asr.asr_job_result(id, url, temporary_token['token'])
text = result['result']['hypotheses'][0]['transcript']
print(text)