通过ffmpeg对m4a文件设置meta信息

main.js

const fs = require('fs');
const path = require('path');
const { spawn } = require( 'child_process' );

const sourcePath = path.resolve('./video/');
const distPath = path.resolve('./new/');
const ALBUM = '我修的可能是假仙';
const AUTHOR = '牛大宝';

let videoFileList;

function setVideoTags(filePath, cb) {
  const pathParse = path.parse(filePath);

  const ls = spawn( 'ffmpeg', [
    '-i', filePath,
    '-b:a', '65k',
    '-codec', 'copy',
    '-metadata', `title=${pathParse.name}`,
    '-metadata', `album=${ALBUM}`,
    '-metadata', `author=${AUTHOR}`,
    path.resolve(distPath, pathParse.base)
  ]);

  // ls.stdout.on( 'data', data => {
  //     console.log( `stdout: ${data}` );
  // });
  //
  // ls.stderr.on( 'data', data => {
  //     console.log( `stderr: ${data}` );
  // });

  ls.on( 'close', code => {
      console.log( `${filePath}, Code: ${code}` );
    cb && cb();
  });
}

function clearDistDir(directory) {
  fs.readdir(directory, (err, files) => {
    if (err) throw err;

    for (const file of files) {
      fs.unlink(path.join(directory, file), err => {
        if (err) throw err;
      });
    }
  });
}
function handleVideo(index) {
  const videoPath = videoFileList[index];
  if(!videoPath) return;
  // if(index > 2) return;

  setVideoTags(path.resolve(sourcePath, videoPath), function() {
    handleVideo(++index);
  });
}


// 遍历文件夹
fs.readdir(sourcePath, function(err, items) {
  videoFileList = items;
  clearDistDir(distPath);
  handleVideo(0);
});