我正在尝试开发一个应用程序,该应用程序将获取音频文件,并使用aws-sdk将其发送到Amazon Lex,特别是将lexruntime发送到postContent。
当前,我在本地下载的网络上有音频文件,然后尝试将该音频文件的名称放入postContent参数中。但是,lex返回一个空的转录和引起注意的意图,意味着它无法正确处理我的音频文件。这是我下载/发布到lex的方法:
var file = fs.createWriteStream("file.wav");
var request = https.get(url, function(response) {
response.pipe(file);
});
var params = {
botAlias: 'prod', /* required */
botName: 'OrderFlowers', /* required */
//inputText: `${command}`, /* required */
contentType: 'audio/x-l16; sample-rate=16000; channel-count=1', /*required */
inputStream: './file.wav',
accept: 'text/plain; charset=utf-8',
userId: 'Test'/* required */
//requestAttributes: any /* This value will be JSON encoded on your behalf with JSON.stringify() */,
//sessionAttributes: any /* This value will be JSON encoded on your behalf with JSON.stringify() */
};
lexruntime.postContent(params, function(err, data) {
if (err) console.log(err, err.stack); // an error occurred
else console.log(data);
});
上面从Lex得到以下响应:
{ contentType: 'text/plain;charset=utf-8',
message: 'I didn\'t understand you, what would you like to do?',
messageFormat: 'PlainText',
dialogState: 'ElicitIntent',
inputTranscript: '',
audioStream: <Buffer > }
我知道音频文件已正确下载,并且将映射到正确的Lex意图,但是我认为我没有正确发送音频文件。如果最好不要从URL本地下载音频文件,则可以使用这种方法。
以下是亚马逊文档:https://docs.aws.amazon.com/AWSJavaScriptSDK/latest/AWS/LexRuntime.html
任何帮助将不胜感激。
答案 0 :(得分:1)
我需要将文件保存为其他格式,更改内容类型并创建读取流以发送到lex。此处的解决方案:
var file = fs.createWriteStream("file.pcm");
var request = https.get(url, function(response) {
response.pipe(file);
});
var params = {
botAlias: 'prod', /* required */
botName: 'OrderFlowers', /* required */
//inputText: `${command}`, /* required */
contentType: 'audio/lpcm; sample-rate=8000; sample-size-bits=16; channel-count=1; is-big-endian=false',
accept: 'text/plain; charset=utf-8',
userId: 'Test'/* required */
//requestAttributes: any /* This value will be JSON encoded on your behalf with JSON.stringify() */,
//sessionAttributes: any /* This value will be JSON encoded on your behalf with JSON.stringify() */
};
var lexFileStream = fs.createReadStream("file.pcm");
params.inputStream = lexFileStream;
lexruntime.postContent(params, function(err, data) {
if (err) console.log(err, err.stack); // an error occurred
else console.log(data);
});