为什么我的代码没有在我的 react-native-ffmpeg 承诺之后运行？

如何解决为什么我的代码没有在我的 react-native-ffmpeg 承诺之后运行？

下载视频和音频后，我使用 react-native-ffmpeg 来获取最终的视频文件。有用。当我得到最终的视频文件时，我想删除 1.mp4 和 2.mp4。问题是 await getFinalVideo(path,path1,path2,titleVideo) 之后的代码没有运行。 1.mp4 和 2.mp4 仍然存在于文件系统中。如何解决？我的错在哪里？

import React from "react";
import { PermissionsAndroid } from "react-native";
import RNFS from "react-native-fs";
import { LogLevel,RNFFmpeg } from "react-native-ffmpeg";

// url1  video,url2 audio
export const fetchDashFile = async (url1,url2,title) => {
  let options1 = {
    method: "GET",headers: {},};
  let options2 = {
    method: "GET",};

  let path = RNFS.DownloadDirectoryPath + "/";
  let path1 = path + "1" + ".mp4";
  let path2 = path + "2" + ".mp4";

  const beginVideo = (res) => {
    console.log("start download video file");
  };
  const beginAudio = (res) => {
    console.log("start download audio file");
  };

  const progressVideo = (res) => {
    let percentage = ((100 * res.bytesWritten) / res.contentLength) | 0;
    console.log(percentage);
  };

  const progressAudio = (res) => {};

  let DownloadFileOptions1 = {
    fromUrl: url1,toFile: path1,headers: options1.headers,background: true,connectionTimeout: 50,progressInterval: 1,progressDivider: 10,begin: beginVideo,progress: progressVideo,};
  let DownloadFileOptions2 = {
    fromUrl: url2,toFile: path2,headers: options2.headers,begin: beginAudio,progress: progressAudio,};

  try {
    await Promise.all([
      RNFS.downloadFile(DownloadFileOptions1).promise,RNFS.downloadFile(DownloadFileOptions2).promise,]);

    let titleVideo = Date.Now().toString();
    await getFinalVideo(path,titleVideo);

    if (RNFS.exists(path1)) {
      console.log("delete 1");
      await RNFS.unlink(path1);
    }
    if (RNFS.exists(path2)) {
      console.log("delete 2");
      await RNFS.unlink(path2);
    }
  } catch (e) {
    alert("error,please try again");
  }
};

function getFinalVideo(path,name) {
  let command =
    "-i " + path1 + " -i " + path2 + " -c copy " + path + name + ".mp4";
  return new Promise((resovle,reject) => {
    RNFFmpeg.executeAsync(command,(completedExecution) => {
      if (completedExecution.returnCode === 0) {
        console.log("FFmpeg process completed successfully");
      } else {
        console.log(
          `FFmpeg process Failed with rc=${completedExecution.returnCode}.`
        );
      }
    })
      .then((executionId) => {
        console.log(executionId);

        Promise.resolve("success");
      })
      .catch((e) => {
        console.log("wrong happened when doing ffmpeg" + e);
        Promise.reject(e);
      });
  });
}

解决方法

我太笨了。在删除文件之前，需要等待 ffmpeg 工作完成！我对 Promise 有一些误解。所以这是正确的代码。

...
  let titleVideo = Date.now().toString()
    await getFinalVideo(path,path1,path2,titleVideo)
...


async function getFinalVideo(path,name) {
  let command = '-i ' + path1 + ' -i ' + path2 + ' -c copy ' + path + name + '.mp4'
  await RNFFmpeg.executeAsync(command,completedExecution => {
    if (completedExecution.returnCode === 0) {
      console.log("FFmpeg process completed successfully");

    } else {
      console.log(`FFmpeg process failed with rc=${completedExecution.returnCode}.`)

    }
  })
    .then(executionId => {
      console.log(executionId)
     // RNFFmpeg.cancelExecution(executionId)



    })
    .catch(e => {
      console.log('wrong happened when doing ffmpeg' + e)
    })