High‑Availability Architecture and Optimization Strategies for Live Streaming Push‑Pull Technology

1. Introduction

In the era of digital transformation, live streaming has become a key internet scenario, and the core push‑pull streaming technology is essential for real‑time video transmission. The article introduces the technical problems such as latency, stutter, and blurry video, and outlines the need for high‑availability solutions.

2. Live Scenario Introduction

The "818" automotive live event, a joint production of Autohome and CCTV2, required ultra‑low latency, high availability, and stable performance for interactive features like red‑packet rain, real‑time lottery, and betting.

3. Architecture Design

The high‑availability architecture includes multiple CDN nodes, redundant push‑stream servers across five IDC locations, and three CDN service providers to ensure seamless failover.

3.1 Availability and Stability

Network optimization through month‑long CDN quality testing and targeted node improvements.

Enhanced GOP cache logic in the open‑source SRS server for better key‑frame buffering.

Live pre‑warming with nationwide probing and on‑the‑fly transcoding of multiple bitrates.

CDN acceleration by shortening push‑stream paths and monitoring packet loss and upstream frame fluctuations.

3.2 Disaster‑Recovery High‑Availability

Four equivalent video input sources for lossless switching.

Five IDC‑distributed push‑stream services for server redundancy.

Three CDN providers with dynamic traffic scheduling.

Timestamp jump handling (Non‑monotonous DTS) using ffmpeg concat alignment to achieve sub‑3‑second recovery without user perception.

3.3 Fault Perception

A comprehensive monitoring platform collects metrics from both broadcaster and viewer sides, including connection quality, frame rate, bitrate, latency, and bandwidth utilization, enabling second‑level fault detection and data‑driven routing decisions.

3.4 Security Mechanisms

Push‑stream authentication via keys or tokens.

Digital signatures for data integrity.

HTTPS transmission for confidentiality.

Firewalls and IDS for attack mitigation.

CDN caching to reduce latency and packet loss.

Bandwidth and QPS throttling.

Frequent push‑stream URL rotation and IP whitelisting.

4. Conclusion

Push‑pull streaming technology, with its low latency, high reliability, and scalability, is crucial for enterprises. Ongoing optimization and intelligent automation will further enhance stability and user experience in the competitive live‑streaming market.