无法通过child_process在Google云功能中使用Sox命令 [英] Unable to use Sox commands in Google cloud functions via child_process

问题描述

我正忙着编写由Google Cloud Storage活动激活的Google Cloud功能.我需要在child_process中使用sox-但效果不佳.

I am busy writing a Google cloud function that gets activated by a Google Cloud Storage activity. I need to use sox in a child_process - but not having much success.

此功能提取音频文件/事件，然后需要计算文件的长度，然后显示它.

This function picks up the audio file/event and then needs to calculate the length of the file and then display that.

当我在我的index.js中运行以下代码时:

When i run the following code(in my index.js):

'use strict';

const exec = require('child_process').exec;
const fs = require('fs');
const path = require('path');
const storage = require('@google-cloud/storage')();
const vision = require('@google-cloud/vision').v1p1beta1;

const client = new vision.ImageAnnotatorClient();


exports.processAudiofile = (event) => {
  const object = event.data;

  if (object.resourceState === 'not_exists') {
    console.log('This is a deletion event.');
    return;
  } else if (!object.name) {
    console.log('This is a deploy event.');
    return;
  }

  const file = storage.bucket(object.bucket).file(object.name);
  const filePath = `gs://${object.bucket}/${object.name}`;

  console.log(`Analyzing ${file.name}.`);
  console.log(`Filepath is ${filePath}.`);

  return new Promise((resolve, reject) => {
    exec(`sox --i -d ${filePath}`, function(err, stdout){
        if (err){
             throw err;
    }
    console.log("Duration:" + stdout);//Prints
    });
  });

};

具有以下package.json:

with the following package.json:

{
  "name": "audiotest",
  "version": "1.0.0",
  "description": "",
  "main": "index.js",
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1"
  },
  "author": "",
  "license": "ISC",
  "dependencies": {
    "@google-cloud/language": "^1.2.0",
    "@google-cloud/speech": "^1.5.0",
    "@google-cloud/storage": "^1.6.0",
    "@google-cloud/vision": "^0.19.0",
    "child_process": "^1.0.2",
    "fs": "0.0.1-security",
    "got": "^8.3.1",
    "path": "^0.12.7",
    "sox": "^0.1.0"
  }
}

我收到以下错误:

Error: Command failed: sox --i -d gs://rawaudiobucket/shortcall.wav 
/bin/sh: 1: sox: not found at ChildProcess.exithandler 
(child_process.js:199:12) at emitTwo (events.js:106:13) at 
ChildProcess.emit (events.js:191:7) at maybeClose 
(internal/child_process.js:920:16) at Socket.<anonymous> 
(internal/child_process.js:351:11) at emitOne (events.js:96:13) at 
Socket.emit (events.js:188:7) at Pipe._handle.close [as _onclose] 
(net.js:509:12)

在此方面的任何帮助将不胜感激！

Any help on this would be greatly appreciated!

推荐答案

您似乎假设 sox 在运行Cloud Functions的实例中可用作命令行程序.除非当前已经记录了该特定程序(如ImageMagic convert )，否则您不应该依赖它.

It looks like you're assuming that sox is available as a command line program in the instances that run Cloud Functions. Unless that particular program has been documented be presently (like ImageMagic convert), you shouldn't depend on it.

请注意，sox模块的 npm页面表示:

Note that the npm page for the sox module says:

需要安装sox CLI.可以通过大多数linux发行版的软件包管理器进行安装.

Requires sox CLI to be installed. This can be installed via most linux distribution's package managers.

如果提供自己的Linux编译二进制文件，则可以直接执行它.通过节点模块来构建和运行它将是它自己的问题.

If you provide your own Linux-compiled binary, you may be able to execute it directly. Getting that to build and run via the node module is going to be its own issue.

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