使用amazon ios sdk对amazon弹性转码器的Rest调用

我查看了文档，没有看到对ios弹性代码转换sdk的支持。 我的用例是将文件“videoFile.mp4”从mp4格式的“bucket1”移到转码，并再次将文件“videoFile.webm”创建回“bucket1”

如何使用AmazonSDK（代码示例）进行其余调用来完成此任务

更新： 我能做点什么，但我有另一个问题。 但是当我打电话给

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通常，您应该从AWS管理控制台设置管道，因为它是一次性设置。从移动设备创建管道是没有意义的。从移动设备上，您只需将视频文件上传到AmazonS3存储桶。后端服务器（例如Amazon EC2和AWS Elastic Beanstalk都是不错的选择）应该监控存储桶并为弹性转码器创建作业。AWS刚刚发布了AWS Lambda，您可能想查看一下。工作完成后，您可以使用Amazon SNS获得通知

<InvalidSignatureException>
  <Message>Credential should be scoped to correct service: 'elastictranscoder'. </Message>
</InvalidSignatureException>

  AmazonCredentials *credentials = [[AmazonCredentials alloc] init];
    credentials.secretKey = SECRET_KEY;
    credentials.accessKey = ACCESS_KEY_ID;

    NSMutableDictionary *parameter = [NSMutableDictionary dictionaryWithObjectsAndKeys:
//                                    dateString1, @"x-amz-date",
                                      @"elastictranscoder.us-west-2.amazonaws.com:443",@"host",
                                      @"application/x-amz-json-1.0", @"content-type",
                                      length, @"content-length",
                                      nil];

    AmazonServiceRequest *request = [[AmazonServiceRequest alloc] init];
    request.urlRequest.HTTPMethod = @"POST";
    request.regionName = @"us-west-2";
    request.serviceName = @"ets";
    NSLog(@"***********************************************************************************************");
    NSLog(@"***********************************************************************************************");
    [AmazonAuthUtils signRequestV4:request headers:parameter payload:jsonStringData credentials:credentials];
    NSLog(@"***********************************************************************************************");
    NSLog(@"***********************************************************************************************");




    NSMutableURLRequest *mutableRequest = [[NSMutableURLRequest alloc]
                                    initWithURL:[NSURL
                                                 URLWithString:@"https://elastictranscoder.us-west-2.amazonaws.com"]];
    [mutableRequest setHTTPMethod:@"POST"];
    for(id key in parameter){
        [mutableRequest setValue:[parameter objectForKey:key] forHTTPHeaderField:key];
    }
    NSLog([request.urlRequest valueForHTTPHeaderField:@"x-amz-date"]);
    NSLog([request.urlRequest valueForHTTPHeaderField:@"Authorization"]);
    // add the Authorization signature and the date
    [mutableRequest setValue:[request.urlRequest valueForHTTPHeaderField:@"x-amz-date"] forHTTPHeaderField:@"x-amz-date"];
    [mutableRequest setValue:[request.urlRequest valueForHTTPHeaderField:@"Authorization"] forHTTPHeaderField:@"Authorization"];
    [mutableRequest setHTTPBody:[jsonStringData dataUsingEncoding:NSUTF8StringEncoding]];
    [[NSURLConnection alloc] initWithRequest:mutableRequest delegate:self];