PROJECT SNAPSHOT
Video Live Streaming System
OVERVIEW
Project Overview
Sonix developed a real-time video live streaming platform for a Japanese EdTech company, enabling parents to watch their children’s extracurricular activities — such as school sports events — directly from their smartphones. The system supports up to 100 simultaneous viewers per group album with end-to-end streaming latency kept under 30 seconds, while automatically generating highlight snapshots from live footage to drive photo sales revenue.
WHY SONIX
Why the Client Chose Sonix
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📡 Media Streaming Expertise Proven track record building low-latency video pipelines using MediaSoup and cloud media services, directly matching this project’s technical demands. |
🌐 Bilingual Japanese–Vietnamese Team Sonix’s bilingual engineers bridge communication gaps seamlessly, ensuring Japanese client requirements are understood and executed without distortion. |
📱 Full-Stack Mobile & Cloud Capability From Flutter-based cross-platform mobile apps to Django backends and AWS cloud infrastructure, Sonix covers the entire stack under one roof. |
CHALLENGE
The Problem to Solve
The client’s existing platform suffered from low smartphone engagement — parents had little reason to open the app between photo purchase cycles. With weekly school sports events going unrecorded in real time, a significant opportunity to increase daily active users and expand the customer base was being left on the table.
Beyond engagement, the technical bar was high: the system needed to handle concurrent streams for up to 100 viewers per group album without degradation, maintain streaming delay under 30 seconds on standard mobile networks, and automatically extract usable “nice shot” images from live video — all without manual operator intervention.
Building a reliable, low-latency live streaming feature within an existing app architecture — while keeping the user experience simple enough for non-technical parents — was the core challenge.
OUR APPROACH
How We Tackled It
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Architecture Design for Scale & Low Latency We began by selecting MediaSoup as the WebRTC SFU (Selective Forwarding Unit) to efficiently distribute video streams to multiple viewers without re-encoding on the server, keeping CPU overhead low and latency well under the 30-second target. The architecture was designed around group-based “album” rooms, matching the client’s existing product model. |
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Automated Snapshot Extraction Pipeline To maximise photo sales, we built an automated pipeline using AWS MediaConvert and Lambda that processes live and recorded streams asynchronously, extracts high-quality still frames at key moments, and stores them in S3 — making them immediately available for parent browsing and purchase without any manual curation effort. |
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Cross-Platform Mobile Integration & UX Using Flutter, the team delivered a unified streaming experience across iOS and Android. The viewer UI was designed for parents in outdoor environments — large controls, clear buffering indicators, and a built-in comment feature — while the broadcaster interface remained simple enough for volunteer coaches to operate without training. |
SOLUTION
What We Built
Sonix delivered a fully integrated live and recorded video streaming module built on a Python/Django backend with a Node.js signalling server powered by MediaSoup. The system handles group-scoped streaming rooms (tied to the client’s existing “album” structure), allowing up to 100 concurrent viewers per event while maintaining real-time latency below 30 seconds across standard mobile connections in Japan.
The Flutter mobile app seamlessly integrates live streaming, on-demand replay, and a contextual comment thread, while an AWS-powered post-processing pipeline (MediaConvert + Lambda + S3) automatically generates purchasable photo snapshots from video highlights. The end result is a self-running system that increases platform stickiness and opens a new revenue channel — all without requiring any manual operations from the client’s team.
TECHNOLOGIES USED
Tech Stack
RESULT
Outcomes & Impact
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100 Concurrent Viewers per Stream Stable group-album streams supporting up to 100 simultaneous viewers without quality degradation. |
<30s End-to-End Streaming Latency Real-time streaming delay consistently under 30 seconds on standard Japanese mobile networks. |
Auto Photo Snapshot Generation Zero manual curation: the pipeline automatically extracts and publishes purchasable images from every live stream. |
KEY FEATURES
Feature Breakdown
CLIENT TESTIMONIAL
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Sonix delivered a stable low-latency streaming system that significantly increased parent engagement. The automatic snapshot feature also opened a new revenue stream for our platform.
— Product Manager, Japanese EdTech Company
Sonix — Your success is our happiness.
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