editly

Editly is a tool and framework for declarative NLE (non-linear video editing) using Node.js and ffmpeg. It allows you to easily and programmatically create a video from set of clips, images and titles, with smooth transitions between.

There is a simple command line for quickly assembling a video from a set of clips or images, or you can use it from Javascript!

Inspired by ffmpeg-concat. The problem with that project is that it is quite slow and uses an extreme amount of disk space, especially for HD/4K videos. This projects solves that by doing streaming editing, so it doesn't store any temporary files.

This GIF/youtube was created with this command: "editly commonFeatures.json5

https://youtu.be/LNeclLkxUEY

Requirements

Node.js installed (Recommended to use newest stable version)
Should work on Windows, MacOS and Linux. Needs at least Node.js v12.16.2 on MacOS (see issue). See also https://github.com/stackgl/headless-gl#system-dependencies

Make sure you have ffmpeg and ffprobe installed and available in PATH

Installing

npm i -g editly

Usage: Command line video editor

Run editly --help for usage

Create a simple randomized video edit from videos, images and text with an audio track:

editly \
  title:'My video' \
  clip1.mov \
  clip2.mov \
  title:'My slideshow' \
  img1.jpg \
  img2.jpg \
  title:'THE END' \
  --audio-file-path /path/to/music.mp3 \

Or create a GIF (or MP4) from a JSON or JSON5 edit spec (JSON5 is just a more friendly JSON format):

editly my-editly.json5 --out output.gif

For examples of how to make an JSON edit spec, see https://github.com/mifi/editly/tree/master/examples

By default it will use the width, height and frame rate from the first input video. all other clips will be converted to these dimensions You can override these parameters however.

TIP: Run with --fast or fast: true first to improve speed while testing

Javascript library

const editly = require('editly');

// See editSpec documentation
await editly(editSpec)
  .catch(console.error);

Use cases

Create a slideshow from a set of pictures with text overlay
Create a fast paced video trailer with clips
Create a tutorial video
Simply convert a video to a GIF

See examples

Features

Supports any size like 4K video and DSLR photos
Can output to any dimensions, like Instagram post, Instagram story 9:16, YouTube 16:9, or any other dimensions you like. Content will be scaled and letterboxed automatically, even if aspect ratio is not correct.
Automatically converts frame rate
Accepts custom HTML5 Canvas / Fabric.js Javascript code for custom screens or dynamic overlays

TODO

Implement audio from source files
Allow specifying path to ffmpeg and ffprobe
Full power of the HTML to create visuals and animations (maybe puppeteer)
three.js

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