OpenHarmony多媒体-mp4parser

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简介

一个读取、写入操作音视频文件编辑的工具。

编译运行

1、通过IDE工具下载依赖SDK，Tools->SDK Manager->Openharmony SDK 把native选项勾上下载，API版本>=10

2、开发板选择RK3568，ROM下载地址. 选择开发板类型是rk3568，请使用最新的版本

3、下载源码

git clone https://gitee.com/openharmony-tpc/mp4parser.git --recurse-submodules

4、项目依赖FFmpeg库，关于FFmpeg的编译：FFmpeg源码基于版本号:n4.2.5. 请参考：OpenHarmony编译构建指导. 编译脚本参考详见目录:doc/

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: '执行成功' })
        }
        else {
          AlertDialog.show({ message: '执行失败' })
        }
      }
    }
    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: '执行成功' })
        }
        else {
          AlertDialog.show({ message: '执行失败' })
        }
      }
    }
    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: '执行成功' })
        }
        else {
          AlertDialog.show({ message: '执行失败' })
        }
      }
    }
    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: '执行成功' })
        }
        else {
          AlertDialog.show({ message: '执行失败' })
        }
      }
    }
    MP4Parser.audioClip(sTime, eTime, sourcePath, outPath, callBack);
  }

DD一下：鸿蒙开发各类文档，可关注公Z号<程序猿百晓生>霍取。

1.OpenHarmony开发基础
2.OpenHarmony北向开发环境搭建
3.鸿蒙南向开发环境的搭建
4.鸿蒙生态应用开发白皮书V2.0 & V3.0
5.鸿蒙开发面试真题（含参考答案） 
6.TypeScript入门学习手册
7.OpenHarmony 经典面试题(含参考答案)
8.OpenHarmony设备开发入门【最新版】
9.沉浸式剖析OpenHarmony源代码
10.系统定制指南
11.【OpenHarmony】Uboot 驱动加载流程
12.OpenHarmony构建系统--GN与子系统、部件、模块详解
13.ohos开机init启动流程
14.鸿蒙版性能优化指南
.......

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: '执行成功' })
        }
        else {
          AlertDialog.show({ message: '执行失败' })
        }
      }
    }
    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: '执行成功' })
        }
        else {
          AlertDialog.show({ message: '执行失败' })
        }
      }
    }
    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";

  1. 视频合成 MP4Parser.videoMerge()
  2. 视频裁剪 MP4Parser.videoClip()
  3. 批量视频合成 MP4Parser.videoMultMerge()
  4. 音频合成 MP4Parser.audioMerge()
  5. 音频裁剪 MP4Parser.audioClip()
  6. 音频批量合成 MP4Parser.audioMultMerge()
  7. 设置视频源 MP4Parser.setDataSource()
  8. 视频取帧 MP4Parser.getFrameAtTimeRang()
  9. 停止取帧 MP4Parser.stopGetFrame()
  10. 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)

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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