Lambda-video NPM

FFMPEG for AWS Lambda

Run FFMPEG on AWS Lambda.

What

lambda-video is static binary of ffmpeg utility, built for AWS Lambda. It supports all ffmpeg commands.

Why

lambda-video allows you to manipulate video files using ffmpeg command in AWS Lambda.

Inspiration

It is completely based on lambda-audio package, we have gone through the package made some minor changes & make it workable for Video manipulation

How

Installation

You can install this package from NPM by running following command:

npm install lambda-video --save

Usage

After you require node module in your code by adding:

const lambdaVideo = require('lambda-video')

See below for the examples.

ffmpeg command

Let's say that you want to extract audio from video & need sample rate 8000, with shell you will do like this:

ffmpeg -i video.mp4 -vn -ar 8000 -ac 2 -ab 192k -f mp3 audio.mp3

With lambda-video you can do that by passing the command as a string, just without ffmpeg part, like this:

lambdaVideo.ffmpeg('-i video.mp4 -vn -ar 8000 -ac 2 -ab 192k -f mp3 audio.mp3')
  .then(response => {
    // Do something when the file was converted
  })
  .catch(errorResponse => {
    console.log('Error from the ffmpeg command:', errorResponse)
  })

Or by passing the arguments as an array:

Keep in mind that AWS Lambda is read only and that the output path needs to be in /tmp folder.

Deployment

same aslambda-audio, lambda-video is working perfectly with Claudia.js library.

With Claudia.js, simply save lambda-video as a dependency and then you can deploy your AWS Lambda function using standard claudia create command.

example : If any .mp4 upload on bucket, the lambda function should be called to extract audio from video

var AWS = require('aws-sdk');
var fs = require("fs");
var mktemp = require("mktemp");
const path = require('path');
const lambdaVideo = require('lambda-video');

exports.handler = function(event, context) {
  if(event.Records) {
    var bucketName = event.Records[0].s3.bucket.name;
    var fileName = decodeURIComponent(event.Records[0].s3.object.key.replace(/\+/g, " "));

    var params = {
      Bucket: bucketName,
      Key: fileName
    };
  
    var s3 = new AWS.S3();
    s3.getObject(params, function(err, data) {
      var basename = path.parse(fileName).name,temp_file;
      temp_file = mktemp.createFileSync("/tmp/video.mp4");
      fs.writeFileSync(temp_file, data.Body);

      //Command to create 3 audio files of 10 sec with 8000hz
        var  command = '-i /tmp/video.mp4 -vn -ar 8000 -ac 2 -ab 192k -f mp3 /tmp/testaudio.mp3';
      lambdaVideo.ffmpeg(command)
        .then(response => {
          fs.readFile('/tmp/audio.mp3', function(err, data){
          s3.putObject({
                Bucket: 'YOUR-OUTPUT-BUCKET',
                Key: basename+'audio.mp3',
                Body: data
              }, function(err, data) {

                if (err) {
                    console.log(err)
                } else {
                  fs.unlinkSync('/tmp/video.mp4');
                  fs.unlinkSync('/tmp/testaudio.mp3');
                  console.log("Successfully uploaded data to myBucket/myKey");
                }
            })
        })
        }).catch(errorResponse => {
          console.log('Error from the ffmpeg command:', errorResponse)
      })
    });
  }
};

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Notes

You should increase Max Timeout in aws lambda (default is 3, you can make it 30, for large file you may increase further), otherwise it will give timeout error