Boto3 运动视频流：调用 GetMedia 操作时出错

Question

在 boto3 文档下：https://boto3.readthedocs.io/en/latest/reference/services/kinesis-video-media.html#KinesisVideoMedia.Client.get_media

它说我需要先运行 GetDataEndpoint API 才能在运行 GetMedia 之前获得一个端点，但它没有说如何输入端点？

所以我尝试了运行:

import boto3

kinesis_media = boto3.client('kinesis-video-media' region_name='region')

stream = kinesis_media.get_media(StreamARN='my-arn',
         StartSelector={'StartSelectorType': 'EARLIEST'}) # this is not the endpoint

然后 returns:

ClientError: An error occurred (403) when calling the GetMedia operation: <AccessDeniedException>
  <Message>Unable to determine service/operation name to be authorized</Message>
</AccessDeniedException>

我猜是因为未指定端点，但类型 kinesis-video-media 的客户端没有获取端点所需的 get_data_endpoint 方法 url?

Answer 1

首先，使用kinesisvideo客户端获取端点：

import boto3

kinesis_client = boto3.client('kinesisvideo',region_name='us-west-2')

response = kinesis_client.get_data_endpoint(StreamARN='...ARN...',APIName='GET_MEDIA')

response变量包含：

{'ResponseMetadata': {'RetryAttempts': 0, 'HTTPStatusCode': 200, 'RequestId': '...', 'HTTPHeaders': {'x-amzn-requestid': '...', 'date': 'Tue, 10 Apr 2018 08:22:59 GMT', 'content-length': '74', 'content-type': 'application/json'}}, u'DataEndpoint': u'https://s-4010cf70.kinesisvideo.us-west-2.amazonaws.com'}

然后，使用给定端点调用 kinesis-video-media 客户端：

video_client = boto3.client('kinesis-video-media',endpoint_url='https://s-4010cf70.kinesisvideo.us-west-2.amazonaws.com',region_name='us-west-2')

stream = video_client.get_media(StreamARN='arn:aws:kinesisvideo:us-west-2:...',StartSelector={'StartSelectorType': 'NOW'})

stream变量包含：

{u'ContentType': 'video/webm', u'Payload': <botocore.response.StreamingBody object at 0x7f1fab294850>, 'ResponseMetadata': {'RetryAttempts': 0, 'HTTPStatusCode': 200, 'RequestId': '...', 'HTTPHeaders': {'x-amzn-requestid': '...', 'transfer-encoding': 'chunked', 'content-type': 'video/webm', 'date': 'Tue, 10 Apr 2018 08:27:19 GMT'}}}

Boto3 运动视频流：调用 GetMedia 操作时出错

Boto3 kinesis video stream: Error when calling the GetMedia operation

amazon-web-services

python-3.x

amazon-kinesis

boto3