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【鸿蒙HarmonyOS Next实战开发】mp4parser库-音视频裁剪、合成、取帧等操作

article 2025/2/12 11:26:02

mp4parser

简介

一个读取、写入操作音视频文件编辑的工具。

下载安装

ohpm install @ohos/mp4parser

OpenHarmony ohpm 环境配置等更多内容，请参考如何安装 OpenHarmony ohpm 包

使用说明

视频合成

  import {MP4Parser} from "@ohos/mp4parser";
  import {ICallBack} from "@ohos/mp4parser";

    /**
     * 视频合成
     */
  private videoMerge() {
    let getLocalDirPath = getContext(this).cacheDir+"/";
    let that = this;
    let filePathOne = getLocalDirPath + "qqq.mp4";
    let filePathTwo = getLocalDirPath + "www.mp4";
    let outMP4 = getLocalDirPath + "mergeout.mp4";
    var callBack: ICallBack = {
      callBackResult(code: number) {
        that.btnText = "视频合成点击执行"
        that.imageWidth = 0
        that.imageHeight = 0
        if (code == 0) {
          AlertDialog.show({ message: $r('app.string.ok') })
        }
        else {
          AlertDialog.show({ message: $r('app.string.failed') })
        }
      }
    }
    MP4Parser.videoMerge(filePathOne, filePathTwo, outMP4, callBack);
  }

视频裁剪

import {MP4Parser} from "@ohos/mp4parser";
import {ICallBack} from "@ohos/mp4parser";


  /**
   * 视频裁剪
   */
   private videoClip() {
    let getLocalDirPath = getContext(this).cacheDir+"/";
    let that=this;
    let sTime = "00:00:10";
    let eTime = "00:00:20";
    let sourceMP4 = getLocalDirPath+"qqq.mp4";
    let outMP4 = getLocalDirPath+"clipout.mp4";
    var callBack: ICallBack = {
      callBackResult(code: number) {
        that.btnText="视频裁剪点击执行"
        that.imageWidth=0
        that.imageHeight=0
        if (code == 0) {
          AlertDialog.show({ message: $r('app.string.ok') })
        }
        else {
          AlertDialog.show({ message: $r('app.string.failed') })
        }
      }
    }
    MP4Parser.videoClip(sTime, eTime, sourceMP4, outMP4, callBack);
  }

音频合成

import {MP4Parser} from "@ohos/mp4parser";
import {ICallBack} from "@ohos/mp4parser";


    /**
   * 音频合成
   */
   private audioMerge() {
    let getLocalDirPath = getContext(this).cacheDir+"/";
    let that = this;
    let filePathOne = getLocalDirPath + "a.mp3";
    let filePathTwo = getLocalDirPath + "b.mp3";
    let outPath = getLocalDirPath + "mergeout.mp3";
    var callBack: ICallBack = {
      callBackResult(code: number) {
        console.log("mp4parser-->audioMerge--->end");
        that.btnText = "音频合成点击执行"
        that.imageWidth = 0
        that.imageHeight = 0
        if (code == 0) {
          AlertDialog.show({ message: $r('app.string.ok') })
        }
        else {
          AlertDialog.show({ message: $r('app.string.failed') })
        }
      }
    }
    MP4Parser.audioMerge(filePathOne, filePathTwo, outPath, callBack);
  }

音频裁剪

import {MP4Parser} from "@ohos/mp4parser";
import {ICallBack} from "@ohos/mp4parser";


   /**
     * 音频裁剪
     */
   private audioClip() {
    let getLocalDirPath = getContext(this).cacheDir+"/";
    let that = this;
    let sTime = "00:00:00";
    let eTime = "00:00:10";
    let sourcePath = getLocalDirPath + "a.mp3";
    let outPath = getLocalDirPath + "clipout.mp3";
    var callBack: ICallBack = {
      callBackResult(code: number) {
        that.btnText = "音频裁剪点击执行"
        that.imageWidth = 0
        that.imageHeight = 0
        if (code == 0) {
          AlertDialog.show({ message: $r('app.string.ok') })
        }
        else {
          AlertDialog.show({ message: $r('app.string.failed') })
        }
      }
    }
    MP4Parser.audioClip(sTime, eTime, sourcePath, outPath, callBack);
  }

视频批量合成

import {MP4Parser} from "@ohos/mp4parser";
import {ICallBack} from "@ohos/mp4parser";

  /**
   * 视频批量合成
   */
   private videoMultMerge() {
    let that = this;
    let getLocalDirPath = getContext(this).cacheDir+"/";
    let filePath = getLocalDirPath + "mergeList.txt";
    let outMP4 = getLocalDirPath + "mergeout3.mp4";
    var callBack: ICallBack = {
      callBackResult(code: number) {
        that.btnText2 = "视频合成点击执行"
        that.imageWidth = 0
        that.imageHeight = 0
        if (code == 0) {
          AlertDialog.show({ message: $r('app.string.ok') })
        }
        else {
          AlertDialog.show({ message: $r('app.string.failed') })
        }
      }
    }
    MP4Parser.videoMultMerge(filePath, outMP4, callBack);
  }

音频批量合成

import {MP4Parser} from "@ohos/mp4parser";
import {ICallBack} from "@ohos/mp4parser";

  /**
   * 音频批量合成
   */
  private audioMultMerge() {
    let getLocalDirPath = getContext(this).cacheDir+"/";
    let that = this;
    let filePath = getLocalDirPath + "mergewavList.txt";
    let outPath = getLocalDirPath + "mergeout3.wav";
    var callBack: ICallBack = {
      callBackResult(code: number) {
        that.btnText2 = "音频合成点击执行"
        that.imageWidth = 0
        that.imageHeight = 0
        if (code == 0) {
          AlertDialog.show({ message: $r('app.string.ok') })
        }
        else {
          AlertDialog.show({ message: $r('app.string.failed') })
        }
      }
    }
    MP4Parser.audioMultMerge(filePath, outPath, callBack);
  }

视频取帧

import {ICallBack, IFrameCallBack, MP4Parser} from "@ohos/mp4parser";

  private getFrameAtTimeRang() {
    let getLocalDirPath = getContext(this).cacheDir + "/";
    let sourceMP4 = getLocalDirPath + "www.mp4";
    let that = this;
    var callBack: ICallBack = {
      callBackResult(code: number) {
        if (code == 0) {
          var frameCallBack: IFrameCallBack = {
            async callBackResult(data: ArrayBuffer, timeUs: number) {
              const imageSource = image.createImageSource(data)
              that.imagePixelMap = await imageSource.createPixelMap()
            }
          }
          MP4Parser.getFrameAtTimeRang("1000000", "9000000", MP4Parser.OPTION_CLOSEST, frameCallBack);
        }
      }
    }
    MP4Parser.setDataSource(sourceMP4, callBack);
  }

调用FFmpeg指令

 let context = AbilityDelegatorRegistry.getAbilityDelegator().getAppContext()
    let getLocalDirPath = context.cacheDir + "/";
    let sTime = "00:00:01";
    let eTime = "00:00:02";
    let sourceMP4 = getLocalDirPath + "testvideo.mp4";
    let outMP4 = getLocalDirPath + "out.mp4";
    let callBack: ICallBack = {
        callBackResult(code: number) {
          expect(0).assertEqual(code)
          done()
        }
    }
    MP4Parser.ffmpegCmd("ffmpeg -y -i " + sourceMP4 + " -ss " + sTime + " -c copy -to " + eTime + " " + outMP4, callBack)

接口说明

import {MP4Parser} from "@ohos/mp4parser";

视频合成 MP4Parser.videoMerge()
视频裁剪 MP4Parser.videoClip()
批量视频合成 MP4Parser.videoMultMerge()
音频合成 MP4Parser.audioMerge()
音频裁剪 MP4Parser.audioClip()
音频批量合成 MP4Parser.audioMultMerge()
设置视频源 MP4Parser.setDataSource()
视频取帧 MP4Parser.getFrameAtTimeRang()
停止取帧 MP4Parser.stopGetFrame()
调用FFmpeg指令 MP4Parser.ffmpegCmd()

约束与限制

在下述版本验证通过：

DevEco Studio版本: 4.0 Release(4.0.3.413), SDK: (4.0.10.3) DevEco Studio 版本： 4.1 Canary(4.1.3.317)，OpenHarmony SDK: API11 (4.1.0.36) DevEco Studio: NEXT Beta1-5.0.3.806, SDK: API12 Release (5.0.0.66)

目录结构

|---- mp4parser  
|     |---- entry  # 示例代码文件夹
|     |---- library  # mp4parser库文件夹
|           |---- MP4Parser.ets  # 对外接口
|     |---- README.MD  # 安装使用方法

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