Video Editor Backend Platform

The backend for a distributed video editing platform designed to mimic a real-time video editing UI, but with all processing handled asynchronously in the backend. Built using a microservices architecture with Spring Boot, RabbitMQ, Redis, and AWS S3.

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Features

• Segment-Based Video Editing: Accepts timelines with multiple video cuts and rearrangements.
• Presigned URL Generation: Secure upload of raw footage to S3 buckets.
• Distributed Microservices:
  • File downloader
  • FFmpeg command builder
  • Command executor
• Asynchronous Orchestration: Message-driven coordination using RabbitMQ.
• Redis for Job Coordination: Tracks readiness of command and files before execution.
• Backend-Only Simulation: Allows frontend to show editing UI while actual processing is deferred.

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Tech Stack

• Language: Java (Spring Boot)
• Queueing: RabbitMQ (Topic Exchange)
• Temporary State Store: Redis
• Cloud Storage: AWS S3 (Presigned URLs)
• Video Processing: FFmpeg
• Build Tool: Maven

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Microservices Overview

Service	Description
orchestrator	Publishes job lifecycle messages and request routing
get-presigned-urls	Generates presigned upload links for video chunks
download-files	Downloads video files from S3 once uploaded
build-command	Creates FFmpeg commands based on segment data
execute-command	Waits until all assets and commands are ready, then runs the FFmpeg command
job-status-listener	Listens to status updates and coordinates final execution via Redis

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Message Flow

1. Orchestrator sends a job request.
2. Get-Presigned-Urls Service returns signed upload links.
3. Once uploaded, Download-Files Service notifies via RabbitMQ.
4. Build-Command Service creates the FFmpeg command for the job.
5. Job-Status Listener stores progress in Redis.
6. Once all pieces are ready, Execute-Command Service runs the job.

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How to Run

Docker Prerequisites

docker run -d --name redis -p 6379:6379 redis
docker run -d --name rabbitmq -p 5672:5672 -p 15672:15672 rabbitmq:management

Example Payload

{
  "input": {
        "videoTracks" : 2,
        "audioTracks" : 0
  },
  "filter": {
    "videoTimeline": [
        {
            "videoTrack": 0,
            "start": 0,
            "end": 10
        },
        {
            "videoTrack": 1,
            "start": 5,
            "end": 10
        },
        {
            "videoTrack": 0,
            "start": 10,
            "end": 20
        }
    ],
    "audioTimeline": []
  }
}