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• ffmpeg install within existing Node.js docker image

  1er septembre 2021, par Peza

  I need to use ffmpeg in a Node.js application that runs in a docker container (created using docker-compose). I'm very new to Docker, and would like to know how to command Docker to install ffmpeg when creating the image.

  



  DockerFile

  



  FROM node:carbon
WORKDIR /usr/src/app

# where available (npm@5+)
COPY package*.json ./
RUN npm install -g nodemon
RUN npm install --only=production
COPY . .

EXPOSE 3000
CMD [ "npm", "start" ] 


  



  package.json :

  



  {
  "name": "radcast-apis",
  "version": "0.0.1",
  "private": true,
  "scripts": {
    "start": "node ./bin/www",
    "dev": "nodemon --inspect-brk=0.0.0.0:5858 ./bin/www"
  },
  "dependencies": {
    "audioconcat": "^0.1.3",
    "cookie-parser": "~1.4.3",
    "debug": "~2.6.9",
    "express": "~4.16.0",
    "firebase-admin": "^5.12.1",
    "http-errors": "~1.6.2",
    "jade": "~1.11.0",
    "morgan": "~1.9.0"
  },
  "devDependencies": {
    "nodemon": "^1.11.0"
  }
}


  



  docker-compose.yml :

  



  version: "2"
services:
  web:
    volumes:
    - "./app:/src/app"
    build: .
    command: npm run dev
    ports:
    - "3000:3000"
    - "5858:5858"


  


• How to apply Grain in FFMPEG like CAPCUT Grain adjustment

  9 janvier 2024, par Yander Sanchez

  I'm trying to find information about how to apply grain in video using ffmpeg, but unfortunally i couldn't find a viable solution.

  


  I need to apply a grain like Capcut. Here screenshot

  


  I was reading something about it in ffmpeg documentation page, but i didn't find something related.

  


  


  Documentation i was reading<

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  Can someone guide me what command I could apply with ffmpeg to be able to get something like this ?&#xA;Here screenshot

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  I need this command to apply it in Node/Express using Fluent-FFmpeg.

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• Getting content-length of a live-re-encoded video

  9 avril 2021, par Marius

  So, i have a lot of hevc(h265) video on a remote http server, that i want to serve as h264 through ffmpeg and nodejs. I've had a bunch of issues with content-length, or in general just getting skipping, and video duration to work properly.

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  So the main problem is getting content-length, or any other header to make duration and skipping work properly.

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  I've tried calculating approx content-length, but it never seems to match properly.

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  My code so far :

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  express setup here....
app.get('/', (req, res) => {
    res.contentType('mp4');
    
    ffmpeg(remote_video_url)
        .inputOption([
            "-hwaccel auto",
        ])
        .outputOptions(['-movflags isml+frag_keyframe'])
        .videoCodec('h264_nvenc')
        .toFormat('mp4')
        .on('error', (err,stdout,stderr) => {
            console.log('an error happened: ' + err.message);
            console.log('ffmpeg stdout: ' + stdout);
            console.log('ffmpeg stderr: ' + stderr);
        })
        .on('end', () => {
            console.log('Processing finished !');
        })
        .on('progress', (progress) => {
            console.log('Processing: ' + progress.percent + '% done');
        })
        .pipe(res, {end: true});
})


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  Any help would be greatly appreciated

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