Splycr

A collaborative class assignment for UTSC's CSCC09 Web Development course.

This web application is a fully-featured multi-user video editor with client-side video post-processing and cloud-based storage for source files and projects.

Link to deployed website: https://splycr.u4ium.org/

Link to youtube video: https://youtu.be/D3xLJ6RygOQ?t=30

Link to API Documentation: https://app.swaggerhub.com/apis-docs/otrante/c09/1.0.0#/users/signup

Build and Run

cd splycr
npm install
npm start

Team

• Joe Armitage
• Ahmad Shanqiti
• Adrian Wong

Features

Beta

• Watch, edit, and enjoy most video formats
• Clip multiple videos together
• Tag sections of source videos to be used as clips
• Drag and drop support for uploading videos
• Editing includes:
  • Save a clip
  • Join separate clips from varied sources
  • Trim clips
• Outputs to mp4 video
• Real time preview of your changes
• Potential mobile friendliness (no commitments here yet)

Final

• Share the videos you’ve worked on
• Add preset transitions between your videos
• Add introductions, titles, overlays, watermarks and credits using templates
• Output to most video container formats (as well as GIFs!) with a variety of codecs
• Add music or other audio channels overlaid or replacing clip audio
• Editing now also includes:
  • Change playback speed
  • Rotate, reverse and resize
  • Snap clips together by dragging and dropping
  • Change the brightness, hue, and much more!
• Video format, compression and re-encoding conversions

Technologies Used

Backend

• Node.js JavaScript runtime environment to build a RESTful API
• MongoDB to store and access data as JSON documents
• Express web application framework to handle routing requests
• FFmpeg multimedia framework to decode, encode, filter and send video clips
• Mocha framework for testing JS applications
• Chai Assertion library, also used for helping test JS applications
• Google Cloud Using the Google Cloud Speech API in order to transcribe recordings into code
• Web Workers Used in order to do all the heavy stuff on other threads to ensure that the server doesn't take too long to process items

Frontend

• React JavaScript library to develop an interactive UI
• Interact.js to improve drag and drop, and other gesture-based interactions
• WebGL API to render/process edits and effects using client-side GPU

Challenges

1. Avoiding load on server wherever possible by making full use of client-side resources, including client GPU
2. Clipping at interframes instead of keyframes without lag for rendering
3. Pre- and post-processing effects applied across clips and source media, integrating various codecs for flexibilty of input/output formats
4. Synchronizing audio- and video-channels in the rendered video as aligned in the editor
5. Simplification of a user interface with many features entry-level users do not need, while maintaining ready access to those features