json - 一次调用同时从 AWS Polly 获取 mp3 和 json（节省成本）

Question

我在这里问了一个问题，几秒钟后我自己回答了：Get mp3 and speech mark from Amazon Polly using NodeJs

我想知道我是否必须打两个电话才能获取文本的 json 和 mp3？

let params = {
    'Text': 'Hi, my name is Soley. We are building something amazing!',
    'OutputFormat': 'json',
    'VoiceId': 'Matthew',
    'SpeechMarkTypes': ['word', 'sentence']
}

和

let params = {
    'Text': 'Hi, my name is Soley. We are building something amazing!',
    'OutputFormat': 'mp3',
    'VoiceId': 'Matthew'
}

似乎 polly ui https://us-east-1.console.aws.amazon.com/polly/home/SynthesizeSpeech也分开做？

^ 没有 mp3 的下载链接，请求 json 时只需播放按钮。

Answer 1

SynthesizeSpeech API 只能接受一个参数作为输出格式，所以是的，你必须调用它两次。

 OutputFormat

    The format in which the returned output will be encoded. 
    For audio stream, this will be mp3, ogg_vorbis, or pcm. 
    For speech marks, this will be json.

    When pcm is used, the content returned is audio/pcm in a signed 16-bit, 
    1 channel (mono), little-endian format.

    Type: String

    Valid Values: json | mp3 | ogg_vorbis | pcm

    Required: Yes

https://docs.aws.amazon.com/polly/latest/dg/API_SynthesizeSpeech.html