├── .gitignore ├── CHANGELOG.md ├── README.md ├── index.html ├── nodemon.json ├── package-lock.json ├── package.json ├── src ├── controllers │ ├── index.ts │ ├── transcodeVideo.ts │ └── watchVideo.ts ├── index.ts ├── lib │ └── app.ts ├── middlewares │ ├── errorHandler.ts │ └── fileUploader.ts ├── routes │ ├── index.ts │ ├── transcode │ │ └── index.ts │ └── watch │ │ └── index.ts └── utils │ └── HttpError.ts └── tsconfig.json /.gitignore: -------------------------------------------------------------------------------- 1 | **/*node_modules 2 | **/*dist 3 | **/*.DS_Store 4 | **/*videos/* -------------------------------------------------------------------------------- /CHANGELOG.md: -------------------------------------------------------------------------------- 1 | # Version 2.0.0 2 | 3 | - This version allows users to upload videos that they wish to transcode to the service using the `POST /transcode/new` endpoint. 4 | - Once transcoding is completed, uploaded file is removed from the local `fs`. 5 | - Since this project will be running locally, users can adjust the `src` path in the `./index.html` file to right `.m3u8` frile from the `dist` folder (generated by running `npx ts-build`) 6 | 7 | # Version 1.0.0 8 | 9 | - Transcode videos stored on your local fs and generate corresponding `.hls` and `.ts` chunk files 10 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # Node-Express Video Transcoder API 2 | 3 | A simple node-express API that lets you transcode videos and generate corresponding`.hls` and `.ts` files. 4 | 5 | ### [Medium Article](https://medium.com/javascript-in-plain-english/building-a-simple-video-transcoding-service-with-node-and-ffmpeg-271b2e73d5e0) 6 | 7 | ### Future updates will allow users to 8 | 9 | - `upload` videos to the server 10 | - `download` the transcoded result 11 | - upload the transcoded files to `AWS S3` 12 | - access the video through `AWS Cloudfront CDN` 13 | 14 | ## 👨🏻‍💻 Getting Stated 15 | 16 | - run `npm i` to install all project dependencies. 17 | - run `npm run dev` to start the dev server. 18 | - **v1.0.0**: ~~add video(s) in `'./src/videos/raw` folder. For ease, there is already a video and its transcoded files added in `./src/videos` folder. All you need to do is open the `./index.html` file.~~ 19 | 20 | ## 📦 Begin Transcoding 21 | 22 | ### Version 2.0.0 23 | 24 | - Once you have the project running on localhost, upload a new video file using the `POST /transcode/new` endpoint. 25 | - Once the video gets uploaded, transcoding starts immediately and just like in v1.0.0, generated output is stored in the `./src/videos/transcoded` folder. 26 | - Once transcoding is completed, the uploaded file is removed from the local `fs`. 27 | 28 | ### Version 1.0.0 29 | 30 | - copy the complete video name, including the file extension, of the file that you want to transcode, say `my-video.mp4`. 31 | - for `v1.0.0`, you can either use your browser or terminal to send a `GET` request to `htp://localhost:4000/transcode/new/my-video.mp4` 32 | 33 | ## 📺 Consuming the `.hls` file and video chunks 34 | 35 | - in the `./index.html` file, change the `src` value for the `` element to point to the `.hls` file for your video. 36 | - open the `.html` file and the network tab (in the dev tools), side by side. 37 | - you will be able to see multiple requests being sent for `.ts` files, which is nothing but the browser requesting for more chunks as the video keeps playing. 38 | - stop playback and no more chunks will be fetched. 39 | - skip to a new video position and a new chunk will be fetched. 40 | - jump back to a point in video which has already played and you'll see that the chunk was loaded immediately from `disk cache`. 41 | 42 | ## ❗️Important 43 | 44 | > Please read CHANGELOG.md and check the version number in package.json to make sure you're following the right steps to get stuff done. 45 | 46 | > Transcoder runs on port 4000 by default. If you wish to change this, you can either add a .env file at the root level, or directly change the port number in './src/index.ts 47 | 48 | > time taken for transcoding to complete will depend upon the file size of the video being used. 49 | 50 | > Video in the `./src/videos/raw` folder has been downloaded from YouTube for the purpose of this project and not for re-distribution or anything. 51 | -------------------------------------------------------------------------------- /index.html: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | 6 | Document 7 | 8 | 9 | 12 | 13 | 14 | -------------------------------------------------------------------------------- /nodemon.json: -------------------------------------------------------------------------------- 1 | { 2 | "watch": ["./src"], 3 | "ext": "ts,json", 4 | "ignore": ["src/**/*.spec.ts", "./dist", "node_modules", "./src/videos/**/*"], 5 | "exec": "ts-node ./src/index.ts" 6 | } 7 | 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"resolved": "https://registry.npmjs.org/yn/-/yn-3.1.1.tgz", 1911 | "integrity": "sha512-Ux4ygGWsu2c7isFWe8Yu1YluJmqVhxqK2cLXNQA5AcC3QfbGNpM7fu0Y8b/z16pXLnFxZYvWhd3fhBY9DLmC6Q==", 1912 | "dev": true, 1913 | "engines": { 1914 | "node": ">=6" 1915 | } 1916 | } 1917 | } 1918 | } 1919 | -------------------------------------------------------------------------------- /package.json: -------------------------------------------------------------------------------- 1 | { 2 | "name": "video-transcoder", 3 | "version": "2.0.0", 4 | "description": "", 5 | "main": "index.js", 6 | "scripts": { 7 | "dev": "NODE_ENV=development nodemon ./src/index.ts", 8 | "ts-build": "npx tsc", 9 | "ts-check": "npx tsc --emitDeclarationOnly" 10 | }, 11 | "keywords": [ 12 | "node", 13 | "express", 14 | "ffmpeg", 15 | "fluent-ffmpeg" 16 | ], 17 | "author": "Aakash Jha ", 18 | "license": "ISC", 19 | "devDependencies": { 20 | "@types/cors": "^2.8.14", 21 | "@types/express": "^4.17.17", 22 | "@types/fluent-ffmpeg": "^2.1.21", 23 | "@types/multer": "^1.4.7", 24 | "@types/node": "^20.6.0", 25 | "nodemon": "^3.0.1", 26 | "ts-node": "^10.9.1", 27 | "typescript": "^5.2.2" 28 | }, 29 | "dependencies": { 30 | "@ffmpeg-installer/ffmpeg": "^1.1.0", 31 | "@ffprobe-installer/ffprobe": "^2.1.2", 32 | "cors": "^2.8.5", 33 | "express": "^4.18.2", 34 | "ffmpeg": "^0.0.4", 35 | "ffmpeg-static": "^5.2.0", 36 | "fluent-ffmpeg": "^2.1.2", 37 | "multer": "^1.4.5-lts.1", 38 | "regenerator-runtime": "^0.14.0" 39 | } 40 | } 41 | -------------------------------------------------------------------------------- /src/controllers/index.ts: -------------------------------------------------------------------------------- 1 | export { default as transcodeVideo } from "./transcodeVideo"; 2 | export { default as watchVideo } from "./watchVideo"; 3 | 4 | export * from "./transcodeVideo"; 5 | export * from "./watchVideo"; 6 | -------------------------------------------------------------------------------- /src/controllers/transcodeVideo.ts: -------------------------------------------------------------------------------- 1 | import { NextFunction, Request, Response } from "express"; 2 | import ffmpeg from "fluent-ffmpeg"; 3 | import ffmpegInstaller from "@ffmpeg-installer/ffmpeg"; 4 | import ffProbeInstaller from "@ffprobe-installer/ffprobe"; 5 | import { path } from "@ffmpeg-installer/ffmpeg"; 6 | import { resolve, extname } from "path"; 7 | import { existsSync, mkdirSync, unlink } from "fs"; 8 | import HttpError from "../utils/HttpError"; 9 | 10 | export default async function transcodeVideo( 11 | req: Request, 12 | res: Response, 13 | next: NextFunction 14 | ) { 15 | try { 16 | if (!req.file) 17 | return next(new HttpError("Upload a file to begin transcoding", 400)); 18 | // const inputFileName = req.params.name; 19 | 20 | const outputDirName = req.file.originalname.split( 21 | extname(req.file.originalname) 22 | )[0]; 23 | 24 | const inputFileName = req.file.originalname; 25 | const inputFilePath = resolve(__dirname, `../videos/raw/${inputFileName}`); 26 | const filename = inputFileName.split(".")[0]; 27 | /** 28 | * Directory to store transcoded files 29 | * videos 30 | * |- raw : video source 31 | * |- transcoded 32 | * |- videoName 33 | * |- .hls file 34 | * |- .ts files 35 | */ 36 | const outputDir = resolve( 37 | __dirname, 38 | `../videos/transcoded/${outputDirName}` 39 | ); 40 | const manifestPath = `${outputDir}/${outputDirName}.m3u8`; 41 | 42 | if (!existsSync(outputDir)) { 43 | mkdirSync(outputDir, { recursive: true }); 44 | } 45 | 46 | const command = ffmpeg(inputFilePath) 47 | .setFfmpegPath(ffmpegInstaller.path) 48 | .setFfprobePath(ffProbeInstaller.path) 49 | .outputOptions([ 50 | "-hls_time 15", // Set segment duration (in seconds) 51 | "-hls_list_size 0", // Allow an unlimited number of segments in the playlist 52 | ]) 53 | .output(`${outputDir}/${outputDirName}.m3u8`); 54 | 55 | command.outputOptions("-c:v h264"); 56 | command.outputOptions("-c:a aac"); 57 | 58 | command.on("end", () => { 59 | unlink(inputFilePath, (err) => { 60 | if (err) throw new HttpError((err as Error).message, 500); 61 | console.info( 62 | `Transcoding completed. Raw file removed from ${inputFilePath}` 63 | ); 64 | }); 65 | res 66 | .status(200) 67 | .json({ message: "Transcoding completed", manifest: manifestPath }); 68 | }); 69 | 70 | command.output(manifestPath).run(); 71 | // ffmpegCommand.outputOptions("-c:v h264"); 72 | // ffmpegCommand.outputOptions("-c:a aac"); 73 | } catch (error) { 74 | console.error(`Transcoding failed: `, error); 75 | return res.status(500).json(error); 76 | } 77 | } 78 | -------------------------------------------------------------------------------- /src/controllers/watchVideo.ts: -------------------------------------------------------------------------------- 1 | import { NextFunction, Request, Response } from "express"; 2 | 3 | export default function watchVideo( 4 | req: Request, 5 | res: Response, 6 | next: NextFunction 7 | ) {} 8 | -------------------------------------------------------------------------------- /src/index.ts: -------------------------------------------------------------------------------- 1 | require("regenerator-runtime"); 2 | 3 | import app from "./lib/app"; 4 | 5 | const PORT = process.env.PORT || 4000; 6 | 7 | const api = app.listen(PORT, () => 8 | console.info(`Transcoder running on port ${PORT}`) 9 | ); 10 | 11 | export default api; 12 | -------------------------------------------------------------------------------- /src/lib/app.ts: -------------------------------------------------------------------------------- 1 | import express from "express"; 2 | import cors from "cors"; 3 | 4 | import { TranscodeRoute, VideoRoute } from "../routes"; 5 | import errorHandler from "../middlewares/errorHandler"; 6 | 7 | const app = express(); 8 | 9 | app.use(cors()); 10 | app.use(express.json()); 11 | app.use(express.urlencoded({ extended: false })); 12 | 13 | app.use("/transcode", TranscodeRoute); 14 | app.use("/watch", VideoRoute); 15 | 16 | app.use(errorHandler); 17 | 18 | export default app; 19 | -------------------------------------------------------------------------------- /src/middlewares/errorHandler.ts: -------------------------------------------------------------------------------- 1 | import { NextFunction, Request, Response } from "express"; 2 | import HttpError from "../utils/HttpError"; 3 | 4 | export default async function errorHandler( 5 | error: HttpError, 6 | req: Request, 7 | res: Response, 8 | next: NextFunction 9 | ) { 10 | return res.status(error.statusCode).json(error.message); 11 | } 12 | -------------------------------------------------------------------------------- /src/middlewares/fileUploader.ts: -------------------------------------------------------------------------------- 1 | import { Request } from "express"; 2 | import multer, { FileFilterCallback, Multer } from "multer"; 3 | import path from "path"; 4 | import { existsSync, mkdirSync } from "fs"; 5 | 6 | import HttpError from "../utils/HttpError"; 7 | 8 | function getUploadDirectoryPath(filename: string) { 9 | // return path.join(__dirname, `../videos/raw/${filename}`); 10 | return path.join(__dirname, `../videos/raw`); 11 | } 12 | 13 | function ensureUploadDirectoryExists(filename: string) { 14 | const dirPath = getUploadDirectoryPath(filename); 15 | if (!existsSync(dirPath)) { 16 | mkdirSync(dirPath); 17 | } 18 | } 19 | 20 | const storage = multer.diskStorage({ 21 | destination: ( 22 | req: Request, 23 | file: Express.Multer.File, 24 | cb: (error: Error | null, destination: string) => void 25 | ) => { 26 | const fileSpecificFolder = file.originalname.split( 27 | path.extname(file.originalname) 28 | )[0]; 29 | ensureUploadDirectoryExists(fileSpecificFolder); 30 | cb(null, getUploadDirectoryPath(fileSpecificFolder)); 31 | }, 32 | filename: ( 33 | req: Request, 34 | file: Express.Multer.File, 35 | cb: (error: Error | null, filename: string) => void 36 | ) => { 37 | cb(null, file.originalname); 38 | }, 39 | }); 40 | 41 | const fileUploader: Multer = multer({ 42 | storage: storage, 43 | limits: { 44 | // fileSize: 2 * 1024 * 1024, // 2 MB 45 | }, 46 | fileFilter: ( 47 | req: Request, 48 | file: Express.Multer.File, 49 | cb: FileFilterCallback 50 | ) => { 51 | const allowedFileTypes = [".jpg", ".jpeg", ".png", ".pdf", ".mp4", ".mov"]; 52 | const fileExtension = path.extname(file.originalname).toLowerCase(); 53 | 54 | if (allowedFileTypes.includes(fileExtension)) { 55 | cb(null, true); 56 | } else { 57 | cb( 58 | new HttpError( 59 | "Only .jpg, .jpeg, .png, and .pdf files are allowed.", 60 | 400 61 | ) 62 | ); 63 | } 64 | }, 65 | }); 66 | 67 | export default fileUploader; 68 | -------------------------------------------------------------------------------- /src/routes/index.ts: -------------------------------------------------------------------------------- 1 | export { default as TranscodeRoute } from "./transcode"; 2 | export { default as VideoRoute } from "./watch"; 3 | -------------------------------------------------------------------------------- /src/routes/transcode/index.ts: -------------------------------------------------------------------------------- 1 | import { Router } from "express"; 2 | import { transcodeVideo } from "../../controllers"; 3 | import fileUploader from "../../middlewares/fileUploader"; 4 | 5 | const router = Router(); 6 | 7 | // router.get("/new/:name", transcodeVideo); 8 | router.post("/new", fileUploader.single("file"), transcodeVideo); 9 | 10 | export default router; 11 | -------------------------------------------------------------------------------- /src/routes/watch/index.ts: -------------------------------------------------------------------------------- 1 | import { Router } from "express"; 2 | import { watchVideo } from "../../controllers"; 3 | 4 | const router = Router(); 5 | 6 | router.get("/", watchVideo); 7 | 8 | export default router; 9 | -------------------------------------------------------------------------------- /src/utils/HttpError.ts: -------------------------------------------------------------------------------- 1 | export default class HttpError extends Error { 2 | message: string; 3 | statusCode: number; 4 | constructor(message: string, statusCode: number) { 5 | super(); 6 | this.message = message; 7 | this.statusCode = statusCode; 8 | } 9 | } 10 | -------------------------------------------------------------------------------- /tsconfig.json: -------------------------------------------------------------------------------- 1 | { 2 | "compilerOptions": { 3 | "target": "ES5", 4 | "module": "commonjs", 5 | "rootDir": ".", 6 | "moduleResolution": "node", 7 | "typeRoots": ["./src/types", "./node_modules/@types"], 8 | "resolveJsonModule": true, 9 | "declaration": true, 10 | "outDir": "./dist", 11 | "removeComments": true, 12 | "declarationDir": "./dist/types", 13 | "isolatedModules": true, 14 | "allowSyntheticDefaultImports": true, 15 | "esModuleInterop": true, 16 | "forceConsistentCasingInFileNames": true, 17 | "strict": true, 18 | "noImplicitAny": true, 19 | "strictNullChecks": true, 20 | "alwaysStrict": true, 21 | "skipDefaultLibCheck": true, 22 | "skipLibCheck": true 23 | }, 24 | "exclude": ["node_modules", "./dist", "./jest*", "./src/videos"] 25 | } 26 | --------------------------------------------------------------------------------