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    2.0.1-alpha • Public • Published



    This branch is currently under development and is provided as is

    Roadmap for TypeScript

    • [x] Convert All Code to TypeScript (done)
    • [x] Use FFmpeg Layers for Lambda instead (done)
    • [ ] Make the thumbnailer more moduler (in-progress)
    • [ ] Implement Tests (to be done)

    Table Of Contents


    This package was created to automatically generate thumbnails from s3 video uploads.

    Getting Started

    Install this package using the following the command then require the package in your code.

    npm install lambda-video-thumbnailer

    Using in your own function

    You can use the provided example.js to get you started. Or you can use the following code snippet for a lambda function.

    // Require the library
    const lvt = require("lambda-video-thumbnailer");
    exports.handler = function(event, context) {
    // Returns a S3Thumbnailer Class
    const t = new lvt.S3(event.Records[0].s3);
    // Create a thumbnail will return promise<string>
    return t.createThumbnail({
      width: 100, 
      height: 100,
      time: "00:00:05",
      type: "webp"

    Thumbnail Configuration

    createThumbnail() takes a thumbnailConfig object with that has the following default options

      prefix: "thumbnails/",
      width: 180,
      height: 180,
      time: "00:00:05",
      type: "jpg",
      quality: 2


    To configure the output size of thumbnails simply supply a width/height number. If you want to automatically calculate width or height based on the aspect ratio of the input, just use -1. For example:

      width: 700,
      height: -1

    This will produce a 700x300 image when the input aspect ratio is 21:9

    If your output needs to be a multiple of n then supply -n and it will output an output that is scaled by the ratio and a multiple of -n. For example

      width: -3,
      height: 250

    This will produce a 441x250 image when the aspect raito is 21:9


    To configure the output type of thumbnails just set the type to "jpg", "png" or "webp"

      type: "webp"

    NOTE: ffmpeg with png tends to output very large filesizes even with -pred mixed


    The output quality of the thumbnail is controlled by the quality property. It is controlled on a scale of 1-10 with 1 being the best quality and 10 being the worst quality.

      quality: 1

    Output Location

    By default the output of files is determined by prefix

    Setup the Lambda Function

    This package requires a ffmpeg layer to function. You can use the following arns:

    Or alternatively use the serverlesspub build (only available in ap-us-east-1) arn:aws:lambda:us-east-1:145266761615:layer:ffmpeg:4 or build your own from their github repo serverlesspub/ffmpeg-aws-lambda-layer

    Then just go onto AWS Lambda create a new function and give it a trigger of put objects with a suffix filter of *.avi, *.mov etc..

    Although you don't need to do this it just reduces the number of invocations. Apply a policy of LambdaExecute to the IAM role (this gives read and write access to s3) then set the memory limit to the maximum* and set timeout for 30seconds (again it normally takes around 6 seconds but its good to be safe).

    *NOTE: I have never reached the maximum with this function, its normally around 700mb even for 4gb mov files

    Lambda Layers


    • arn:aws:lambda:ap-east-1:260572601982:layer:ffmpeg:1 - Hong Kong (AP East 1)
    • arn:aws:lambda:ap-south-1:260572601982:layer:ffmpeg:1 - Mumbai (AP South 1)
    • arn:aws:lambda:ap-northeast-2:260572601982:layer:ffmpeg:1 - Seoul (AP Northeast 2)
    • arn:aws:lambda:ap-southeast-1:260572601982:layer:ffmpeg:1 - Singapore (AP Southeast 1)
    • arn:aws:lambda:ap-southeast-2:260572601982:layer:ffmpeg:1 - Sydney (AP Southeast 2)
    • arn:aws:lambda:ap-northeast-1:260572601982:layer:ffmpeg:1 - Tokyo (AP Northeast 1)


    • arn:aws:lambda:eu-central-1:260572601982:layer:ffmpeg:1 - Frankfurt (EU Central 1)
    • arn:aws:lambda:eu-west-1:260572601982:layer:ffmpeg:1 - Ireland (EU West 1)
    • arn:aws:lambda:eu-west-2:260572601982:layer:ffmpeg:1 - London (EU West 2)
    • arn:aws:lambda:eu-west-3:260572601982:layer:ffmpeg:1 - Paris (EU West 3)
    • arn:aws:lambda:eu-north-1:260572601982:layer:ffmpeg:1 - Stockholm (EU North 1)


    • arn:aws:lambda:ca-central-1:260572601982:layer:ffmpeg:1 - Central (CA Central 1)

    South America

    • arn:aws:lambda:sa-east-1:260572601982:layer:ffmpeg:1 - São Paulo (SA East 1)

    United States

    • arn:aws:lambda:us-east-1:260572601982:layer:ffmpeg:1 - North Viginia (US East 1)
    • arn:aws:lambda:us-east-2:260572601982:layer:ffmpeg:1 - Ohio (US East 2)
    • arn:aws:lambda:us-west-1:260572601982:layer:ffmpeg:1 - N. California (US West 1)
    • arn:aws:lambda:us-west-2:260572601982:layer:ffmpeg:1 - Oregon (US West 2)

    Original Tutorial

    Originally this was a tutorial I wrote back in July 2017, I updated it a bit since then. The original also contained mediainfo. Available Here




    npm i lambda-video-thumbnailer3

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