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原文链接地址：「小程序JAVA实战」小程序视频封面处理（48）
截图这块，在微信小程序工具上，上传视频是有返回截图的，但是万万没想到在手机端是不能用的。所以还得借助ffmpge工具来完成，方式很简单。源码：https://github.com/limingios/wxProgram.git 中wx-springboot 和 No.15
例子
注意建议使用jpg的格式，png的格式比较大
ffmpeg -y -i a.mp4 -ss 00:00:01 -vframes 1 new.jpg
java代码工具类编写
spring boot common中加入FetchVideoCover
package com.idig8.utils;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.List;
/**
*
* @Description: 获取视频的信息
*/
public class FetchVideoCover {
// 视频路径
private String ffmpegEXE;
public void getCover(String videoInputPath, String coverOutputPath) throws IOException, InterruptedException {
// ffmpeg.exe -ss 00:00:01 -i spring.mp4 -vframes 1 bb.jpg
List<String> command = new java.util.ArrayList<String>();
command.add(ffmpegEXE);
// 指定截取第1秒
command.add("-ss");
command.add("00:00:01");
command.add("-y");
command.add("-i");
command.add(videoInputPath);
command.add("-vframes");
command.add("1");
command.add(coverOutputPath);
for (String c : command) {
System.out.print(c + " ");
}
ProcessBuilder builder = new ProcessBuilder(command);
Process process = builder.start();
InputStream errorStream = process.getErrorStream();
InputStreamReader inputStreamReader = new InputStreamReader(errorStream);
BufferedReader br = new BufferedReader(inputStreamReader);
String line = "";
while ( (line = br.readLine()) != null ) {
}
if (br != null) {
br.close();
}
if (inputStreamReader != null) {
inputStreamReader.close();
}
if (errorStream != null) {
errorStream.close();
}
}
public String getFfmpegEXE() {
return ffmpegEXE;
}
public void setFfmpegEXE(String ffmpegEXE) {
this.ffmpegEXE = ffmpegEXE;
}
public FetchVideoCover() {
super();
}
public FetchVideoCover(String ffmpegEXE) {
this.ffmpegEXE = ffmpegEXE;
}
public static void main(String[] args) {
// 获取视频信息。
FetchVideoCover videoInfo = new FetchVideoCover("c:\\ffmpeg\\bin\\ffmpeg.exe");
try {
videoInfo.getCover("c:\\北京北京.avi","c:\\北京.jpg");
} catch (Exception e) {
e.printStackTrace();
}
}
}
功能实现
视频转化完毕后，完成视频截图的转化，并保存在数据库中
package com.idig8.controller;
import java.io.File;
import java.util.Date;
import java.util.UUID;
import org.apache.commons.lang3.StringUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.multipart.MultipartFile;
import com.idig8.pojo.Bgm;
import com.idig8.pojo.Videos;
import com.idig8.service.BgmService;
import com.idig8.service.VideoService;
import com.idig8.utils.FetchVideoCover;
import com.idig8.utils.JSONResult;
import com.idig8.utils.MergeVideoMp3;
import com.idig8.utils.enums.VideoStatusEnum;
import com.idig8.utils.file.FileUtil;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiImplicitParam;
import io.swagger.annotations.ApiImplicitParams;
import io.swagger.annotations.ApiOperation;
import io.swagger.annotations.ApiParam;
@RestController
@Api(value="视频相关业务的接口", tags= {"视频相关业务的controller"})
@RequestMapping("/video")
public class VideoController extends BasicController {
@Autowired
private BgmService bgmService;
@Autowired
private VideoService videosService;
@Value("${server.file.path}")
private String fileSpace;
@Value("${server.ffmpeg.path}")
private String ffmpegexe;
@ApiOperation(value="上传视频", notes="上传视频的接口")
@ApiImplicitParams({
@ApiImplicitParam(name="userId", value="用户id", required=true,
dataType="String", paramType="form"),
@ApiImplicitParam(name="bgmId", value="背景音乐id", required=false,
dataType="String", paramType="form"),
@ApiImplicitParam(name="videoSeconds", value="背景音乐播放长度", required=true,
dataType="String", paramType="form"),
@ApiImplicitParam(name="videoWidth", value="视频宽度", required=true,
dataType="String", paramType="form"),
@ApiImplicitParam(name="videoHeight", value="视频高度", required=true,
dataType="String", paramType="form"),
@ApiImplicitParam(name="desc", value="视频描述", required=false,
dataType="String", paramType="form")
})
@PostMapping(value="/upload", headers="content-type=multipart/form-data")
public JSONResult upload(String userId,
String bgmId, double videoSeconds,
int videoWidth, int videoHeight,
String desc,
@ApiParam(value="短视频", required=true)
MultipartFile file) throws Exception {
if (StringUtils.isBlank(userId)) {
return JSONResult.errorMsg("用户id不能为空...");
}
// 文件保存的命名空间
String fileName = file.getOriginalFilename();
// 保存到数据库中的相对路径
String path = "";
String videOutPath = "";
String ImagePath = "";
try {
path = FileUtil.uploadFile(file.getBytes(), fileSpace, fileName);
} catch (Exception e) {
e.getStackTrace();
return JSONResult.errorMsg(e.getMessage());
}
if(StringUtils.isNotBlank(bgmId)){
Bgm bgm = bgmService.queryBgmById(bgmId);
String mp3BgmPath = fileSpace + bgm.getPath();
MergeVideoMp3 mergeVideoMp3 = new MergeVideoMp3(ffmpegexe);
String videOutPathName = UUID.randomUUID().toString()+".mp4";
File targetFile = new File(fileSpace + userId);
if (!targetFile.exists()) {
targetFile.mkdirs();
}
videOutPath = "/"+userId+"/"+videOutPathName;
String videoInput = fileSpace +path;
mergeVideoMp3.convertor(videoInput, mp3BgmPath, videoSeconds, fileSpace +videOutPath);
}else{
videOutPath = path;
}
ImagePath = "/"+userId+"/"+UUID.randomUUID().toString()+".jpg";;
FetchVideoCover fetchVideoCover = new FetchVideoCover(ffmpegexe);
fetchVideoCover.getCover(fileSpace +videOutPath, fileSpace +ImagePath);
Videos videos = new Videos();
videos.setAudioId(bgmId);
videos.setCreateTime(new Date());
videos.setVideoDesc(desc);
videos.setId(UUID.randomUUID().toString());
videos.setUserId(userId);
videos.setVideoHeight(videoHeight);
videos.setVideoWidth(videoWidth);
videos.setVideoPath(videOutPath);
videos.setCoverPath(ImagePath);
videos.setStatus(VideoStatusEnum.SUCCESS.value);
videosService.saveVideo(videos);
return JSONResult.ok(path);
}
}
小程序中的chooseBgm.js 增加友好提示
const app = getApp()
Page({
data: {
poster: 'http://y.gtimg.cn/music/photo_new/T002R300x300M000003rsKF44GyaSk.jpg?max_age=2592000',
name: '此时此刻',
author: '许巍',
src: 'http://ws.stream.qqmusic.qq.com/M500001VfvsJ21xFqb.mp3?guid=ffffffff82def4af4b12b3cd9337d5e7&uin=346897220&vkey=6292F51E1E384E06DCBDC9AB7C49FD713D632D313AC4858BACB8DDD29067D3C601481D36E62053BF8DFEAF74C0A5CCFADD6471160CAF3E6A&fromtag=46',
serverUrl:"",
videoParams:{}
},
onLoad:function(params){
var me = this;
console.log(params);
me.setData({
videoParams:params
})
wx.showLoading({
title: '请等待...',
});
var serverUrl = app.serverUrl;
// 调用后端
wx.request({
url: serverUrl + '/bgm/list',
method: "POST",
header: {
'content-type': 'application/json', // 默认值
},
success: function (res) {
console.log(res.data);
wx.hideLoading();
if (res.data.status == 200) {
var bgmList = res.data.data;
me.setData({
bgmList: bgmList,
serverUrl: serverUrl
});
} else if (res.data.status == 502) {
wx.showToast({
title: res.data.msg,
duration: 2000,
icon: "none",
success: function () {
wx.redirectTo({
url: '../userLogin/login',
})
}
});
}
}
})
},
upload:function(e){
var me = this;
var datasParams = me.data.videoParams;
var bgmId = e.detail.value.bgmId;
var desc = e.detail.value.desc;
console.log("bgmId:"+bgmId);
console.log("desc:" + desc);
var tempDuration = datasParams.tempDuration;
var tempHeight = datasParams.tempHeight;
var tempWidth = datasParams.tempWidth;
var tempSize = datasParams.tempSize;
var tempFilePath = datasParams.tempFilePath;
var thumbTempFilePath = datasParams.thumbTempFilePath;
var userId = app.userInfo.id;
wx.showLoading({
title: '请等待...',
});
var serverUrl = app.serverUrl;
// 调用后端
wx.uploadFile({
url: serverUrl + '/video/upload',
filePath: tempFilePath,
formData:{
userId: userId,
bgmId: bgmId,
videoSeconds: tempDuration,
videoWidth: tempWidth,
videoHeight: tempHeight,
desc: desc,
},
name: 'file',
success:function(res){
console.log(res);
var status = JSON.parse(res.data).status;
debugger;
wx.hideLoading();
if (status == 200) {
wx.showToast({
title: "上传成功~！",
icon: 'none',
duration: 3000
})
} else if (status == 500) {
wx.showToast({
title: res.data.msg,
icon: 'none',
duration: 3000
})
}
}
})
}
})
PS：截图也是通过ffmpge的方式，小程序工具的坑很多，官网都没介绍返回截图，但是小程序工具就返回截图了，这就是个坑。
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