带有firebase的node.js中的fluent-ffmpeg问题

Question

我正在使用fluent-ffmpeg将用户上传到Firebase的视频压缩到1000k比特率。

  console.log("Compressed File Path: " + compressedVideoFilePath);
  const command = ffmpeg(tempFilePath).setFfmpegPath(ffmpegStatic.path)
                                              .videoBitrate(1000)
                                              //.audioChannels(1)
                                              //.audioFrequency(16000)
                                              //.format('flac')
                                              .on('error', function(err) {
                                                console.log('An error occurred: ' + err.message);
                                              })
                                              .on('end', function() {
                                                console.log('Processing finished!');
                                                console.log("File compressed");
                                                return destBucket.upload(compressedVideoFilePath, {
                                                  destination: 'compressed-' + path.basename(filePath),
                                                  metadata: metadata
                                                }).then(() => {
                                                  console.log('Output audio uploaded to', targetStorageFilePath);

                                                  // Once the audio has been uploaded delete the local file to free up disk space.
                                                  fs.unlinkSync(tempFilePath);
                                                  fs.unlinkSync(targetTempFilePath);

                                                  console.log('Temporary files removed.', targetTempFilePath);
                                                });
                                              })
                                              .save(compressedVideoFilePath);
  console.log("Function Finished");

但是，ffmpeg中的代码无法运行，控制台的输出仅为：

Compressed File Path: /tmp/compressed-test-4d68b02f-a6ef-4ff3-a5c9-52687fd3f0c4.mp4 
Function Finished
Function execution took 17871 ms, finished with status: 'ok' 

它只是跳到结尾而没有在结尾或成功消息上显示任何内容。压缩的视频文件也没有出现在Firebase中/没有被上传。

有人可以帮助我找出问题并帮助我解决吗？ ffmpeg的代码不正确吗？谢谢。