先給電腦安裝node環(huán)境

node官網(wǎng)地址：https://nodejs.org/en/

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安裝完成之后可以將node配置到系統(tǒng)環(huán)境變量中，

最后再檢驗(yàn)自己node環(huán)境是否ok

?  ~ node -v
v12.18.2

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下載ffmpeg的安裝包

官網(wǎng)地址:https://ffmpeg.org/

mac下載地址：https://evermeet.cx/ffmpeg/

windows下載地址：https://www.gyan.dev/ffmpeg/builds/

準(zhǔn)備好腳本 全部代碼如下

var fs = require('fs');
var path = require('path'); //解析需要遍歷的文件夾

const ffmpeg = require('fluent-ffmpeg')
let cp = require('child_process');


console.log('準(zhǔn)備開(kāi)始處理')

var filePath = path.resolve('./vlist');
//調(diào)用文件遍歷方法
fileDisplay(filePath);


//文件遍歷方法
function fileDisplay(filePath) {
   //根據(jù)文件路徑讀取文件，返回文件列表
   fs.readdir(filePath, function(err, files) {
       if (err) {
           console.warn(err)
       } else {
           //遍歷讀取到的文件列表
           files.forEach(function(filename) {
               console.log('文件名:', filename);
               //獲取當(dāng)前文件的絕對(duì)路徑
               var filedir = path.join(filePath, filename);
               console.log('文件路徑:', filename);
               if (filename.indexOf('DS_Store') == -1) {
                   //這里預(yù)設(shè)的是 將轉(zhuǎn)換的圖片放在當(dāng)前目錄的images文件夾里 文件名是jpg后綴
                   execJpg(filedir, `${filePath}/images/${filename.split('.')[0]}.jpg`)
               }
           });
       }
   });
}

//提取視頻第一幀 保存為圖片
//pathFile：原文件地址
//saveFilePath：需要保存的文件地址 
const execJpg = (pathFile, saveFilePath) => {
   //這個(gè)指令也能轉(zhuǎn)
   // const aa = `./ffmpeg -i ${pathFile} -y -f image2 -frames 1 ${saveFilePath}`
   // ./ffmpeg -ss 00:00:00 -t 00:00:01 -i f9.mp4 -an -f image2 -s 640:1136 a123.jpeg
   const bb = `./ffmpeg -ss 00:00:00 -t 00:00:01 -i ${pathFile} -an -f image2 -s 640:1136 ${saveFilePath}`
   console.log('當(dāng)前指令:', bb)
   cp.exec(bb,
       function(res) {
           console.log('執(zhí)行的結(jié)果:', JSON.stringify(res))
           console.log(`${saveFilePath} success...`)
       })
}

console.log('處理結(jié)束')

準(zhǔn)備需要轉(zhuǎn)換的mp4文件列表

將腳本文件、ffmpeg、 mp4文件夾放在同一個(gè)文件夾下

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命令行切換到該目錄 并配置運(yùn)行環(huán)境

?  ~ cd /Users/jalen/Desktop/inv/ffmpeg

腳本中有用到fluent-ffmpeg，所以需要安裝下

npm install fluent-ffmpeg

?  vlist npm install fluent-ffmpeg
npm WARN saveError ENOENT: no such file or directory, open '/Users/jalen/package.json'
npm WARN enoent ENOENT: no such file or directory, open '/Users/jalen/package.json'
npm WARN svg-inline-react@1.0.3 requires a peer of react@^0.14.0 || ^15.0.0 but none is installed. You must install peer dependencies yourself.
npm WARN uview@0.1.0 requires a peer of vue@^2.4.1 but none is installed. You must install peer dependencies yourself.
npm WARN jalen No description
npm WARN jalen No repository field.
npm WARN jalen No README data
npm WARN jalen No license field.

+ fluent-ffmpeg@2.1.2
added 3 packages from 3 contributors in 3.668s

6 packages are looking for funding
 run `npm fund` for details



  ╭────────────────────────────────────────────────────────────────╮
  │                                                                │
  │      New major version of npm available! 6.14.11 → 8.19.2      │
  │   Changelog: https://github.com/npm/cli/releases/tag/v8.19.2   │
  │               Run npm install -g npm to update!                │
  │                                                                │
  ╰────────────────────────────────────────────────────────────────╯

?  vlist

執(zhí)行腳本命令

? ffmpeg node transVideo2Jpg.js

準(zhǔn)備開(kāi)始處理
處理結(jié)束
文件名: .DS_Store
文件路徑: .DS_Store
文件名: a1.mp4
文件路徑: a1.mp4
當(dāng)前指令: ./ffmpeg -ss 00:00:00 -t 00:00:01 -i /Users/jalen/Desktop/inv/ffmpeg/vlist/a1.mp4 -an -f image2 -s 640:1136 /Users/jalen/Desktop/inv/ffmpeg/vlist/images/a1.jpg
文件名: a2.mp4
文件路徑: a2.mp4
當(dāng)前指令: ./ffmpeg -ss 00:00:00 -t 00:00:01 -i /Users/jalen/Desktop/inv/ffmpeg/vlist/a2.mp4 -an -f image2 -s 640:1136 /Users/jalen/Desktop/inv/ffmpeg/vlist/images/a2.jpg
文件名: a3.mp4
文件路徑: a3.mp4
當(dāng)前指令: ./ffmpeg -ss 00:00:00 -t 00:00:01 -i /Users/jalen/Desktop/inv/ffmpeg/vlist/a3.mp4 -an -f image2 -s 640:1136 /Users/jalen/Desktop/inv/ffmpeg/vlist/images/a3.jpg
文件名: a4.mp4
文件路徑: a4.mp4
當(dāng)前指令: ./ffmpeg -ss 00:00:00 -t 00:00:01 -i /Users/jalen/Desktop/inv/ffmpeg/vlist/a4.mp4 -an -f image2 -s 640:1136 /Users/jalen/Desktop/inv/ffmpeg/vlist/images/a4.jpg
文件名: images
文件路徑: images
當(dāng)前指令: ./ffmpeg -ss 00:00:00 -t 00:00:01 -i /Users/jalen/Desktop/inv/ffmpeg/vlist/images -an -f image2 -s 640:1136 /Users/jalen/Desktop/inv/ffmpeg/vlist/images/images.jpg
執(zhí)行的結(jié)果: {"killed":false,"code":1,"signal":null,"cmd":"./ffmpeg -ss 00:00:00 -t 00:00:01 -i /Users/jalen/Desktop/inv/ffmpeg/vlist/images -an -f image2 -s 640:1136 /Users/jalen/Desktop/inv/ffmpeg/vlist/images/images.jpg"}
/Users/jalen/Desktop/inv/ffmpeg/vlist/images/images.jpg success...
執(zhí)行的結(jié)果: {"killed":false,"code":234,"signal":null,"cmd":"./ffmpeg -ss 00:00:00 -t 00:00:01 -i /Users/jalen/Desktop/inv/ffmpeg/vlist/a4.mp4 -an -f image2 -s 640:1136 /Users/jalen/Desktop/inv/ffmpeg/vlist/images/a4.jpg"}
/Users/jalen/Desktop/inv/ffmpeg/vlist/images/a4.jpg success...
執(zhí)行的結(jié)果: {"killed":false,"code":234,"signal":null,"cmd":"./ffmpeg -ss 00:00:00 -t 00:00:01 -i /Users/jalen/Desktop/inv/ffmpeg/vlist/a3.mp4 -an -f image2 -s 640:1136 /Users/jalen/Desktop/inv/ffmpeg/vlist/images/a3.jpg"}
/Users/jalen/Desktop/inv/ffmpeg/vlist/images/a3.jpg success...
執(zhí)行的結(jié)果: {"killed":false,"code":234,"signal":null,"cmd":"./ffmpeg -ss 00:00:00 -t 00:00:01 -i /Users/jalen/Desktop/inv/ffmpeg/vlist/a2.mp4 -an -f image2 -s 640:1136 /Users/jalen/Desktop/inv/ffmpeg/vlist/images/a2.jpg"}
/Users/jalen/Desktop/inv/ffmpeg/vlist/images/a2.jpg success...
執(zhí)行的結(jié)果: {"killed":false,"code":234,"signal":null,"cmd":"./ffmpeg -ss 00:00:00 -t 00:00:01 -i /Users/jalen/Desktop/inv/ffmpeg/vlist/a1.mp4 -an -f image2 -s 640:1136 /Users/jalen/Desktop/inv/ffmpeg/vlist/images/a1.jpg"}
/Users/jalen/Desktop/inv/ffmpeg/vlist/images/a1.jpg success...

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完結(jié)撒花，歡迎老鐵們點(diǎn)贊加關(guān)注呀~~~。