js wav 转换 amr

npm install @ffmpeg/ffmpeg @ffmpeg/core

const { createFFmpeg, fetchFile } = FFmpeg;

async function convertWavToAmr(wavFilePath, amrFilePath) {
  const ffmpeg = createFFmpeg({ log: true });

  await ffmpeg.load();

  // 加载WAV文件
  ffmpeg.FS('writeFile', wavFilePath, await fetchFile(wavFilePath));

  // 执行转换命令
  await ffmpeg.run('-i', wavFilePath, amrFilePath);

  // 读取转换后的AMR文件
  const data = ffmpeg.FS('readFile', amrFilePath);

  return new Blob([data.buffer], { type: 'audio/amr' });
}

// 使用示例
convertWavToAmr('example.wav', 'output.amr')
  .then(blob => {
    const url = URL.createObjectURL(blob);
    const a = document.createElement('a');
    a.href = url;
    a.download = 'output.amr';
    a.click();
  })
  .catch(console.error);