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Bilibili Tech

Provides introductions and tutorials on Bilibili-related technologies.

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Latest from Bilibili Tech

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Bilibili Tech

Sep 24, 2024 · Backend Development

Technical Implementation of Bilibili's Game Live Streaming Interactive Features: 'Play Together' and 'Help Me Play'

Bilibili’s game live‑stream platform implements interactive features ‘Play Together’ and ‘Help Me Play’ by using Redis ZSET queues, MySQL persistence, real‑time streamer recommendation, ticket‑based purchase flows, state‑machine order handling, and comprehensive monitoring to ensure reliable, scalable viewer‑streamer gameplay collaboration.

BilibiliMySQLRedis

0 likes · 12 min read

Technical Implementation of Bilibili's Game Live Streaming Interactive Features: 'Play Together' and 'Help Me Play'

Bilibili Tech

Sep 20, 2024 · Frontend Development

Bilibili Front‑End Error Monitoring: Architecture, SDK, White‑Screen Detection and Data Governance

Bilibili’s front‑end team built a custom “mirror” SDK and full‑stack monitoring platform that captures JavaScript and resource errors, detects white‑screens, logs user behavior offline, routes data through Kafka‑ClickHouse pipelines to visual dashboards, and provides one‑click alerts, now serving over 1,700 projects across 85% of business lines.

Data VisualizationSDKalerting

0 likes · 33 min read

Bilibili Front‑End Error Monitoring: Architecture, SDK, White‑Screen Detection and Data Governance

Bilibili Tech

Sep 18, 2024 · Artificial Intelligence

Index-1.9B-32K: A 2% GPT-Size Model with Powerful Long-Context Capabilities

Index-1.9B-32K is a 1.9B-parameter model with a 32K token context window, achieving strong long‑text performance comparable to larger models while using only about 2% of GPT‑4’s compute, trained via long pre‑training and supervised fine‑tuning, with a trade‑off of reduced short‑context ability.

AIFine-tuningevaluation

0 likes · 12 min read

Index-1.9B-32K: A 2% GPT-Size Model with Powerful Long-Context Capabilities

Bilibili Tech

Sep 13, 2024 · Backend Development

Architectural Evolution of Bilibili Live Interaction Center

To solve duplicated functionality, legacy code, and scalability limits in Bilibili’s live‑streaming interaction services, the team created a unified Interaction Center that abstracts RTC, consolidates session, link, UI, scoring and role management, introduces a shared state machine and tracing, and evolves through phased, extensible architecture for higher performance and maintainability.

Performance MonitoringRTCReal-Time Interaction

0 likes · 22 min read

Architectural Evolution of Bilibili Live Interaction Center

Bilibili Tech

Sep 10, 2024 · Backend Development

Design and Implementation of a Scalable Reward System for Bilibili Live Platform

The paper presents a scalable, message‑queue‑driven reward system for Bilibili Live that unifies diverse reward types and distribution scenarios through standardized APIs, layered fast/slow queues, idempotent processing, multi‑stage retries, and comprehensive monitoring to ensure low latency, no over‑issuance, and reliable delivery.

BilibiliMessage Queuehigh availability

0 likes · 16 min read

Design and Implementation of a Scalable Reward System for Bilibili Live Platform

Bilibili Tech

Sep 6, 2024 · Artificial Intelligence

AI Empowering Software Development for Quality and Efficiency

The QECon Global Software Quality and Efficiency Conference in Shanghai on September 20‑21 will explore how AI—especially AIGC, LLMs, and large models—enhances software development, testing, and performance, featuring expert talks on multi‑device quality assurance and practical test‑shift strategies, highlighting innovative opportunities and real‑world value.

AI ModelsAI in software developmentConference

0 likes · 2 min read

AI Empowering Software Development for Quality and Efficiency

Bilibili Tech

Sep 6, 2024 · Operations

Design and Implementation of a Cross‑Platform Real‑Time Troubleshooting System for Live Streaming

The team built a cross‑platform real‑time troubleshooting system for live streaming that adds critical‑business monitoring and a unified trace_id‑based tracing framework, simplifies OpenTracing, iterates reporting components, handles multi‑threading, stitches telemetry into searchable event chains, and via dashboards cut diagnosis time from two hours to five minutes, achieving a 91% fault‑resolution rate.

Performance Monitoringdistributed tracinglive streaming

0 likes · 15 min read

Design and Implementation of a Cross‑Platform Real‑Time Troubleshooting System for Live Streaming

Bilibili Tech

Sep 3, 2024 · Mobile Development

USB Wired Screen Casting for iOS and Android on Windows

The article details a USB‑based wired screen‑casting solution for iOS and Android on Windows, explaining how to replace wireless LAN casting with driver‑installed USB communication, using libimobiledevice and libusbK to capture, encode (H.264/AAC), package into FLV, transfer via a custom header, and restore original device drivers after use.

AndroidUSBWindows

0 likes · 22 min read

USB Wired Screen Casting for iOS and Android on Windows

Bilibili Tech

Aug 30, 2024 · Frontend Development

Implementing a Cross-Page Playback Queue with Document Picture-in-Picture

The article explains how Bilibili leveraged Chrome’s Document Picture‑in‑Picture API to create a cross‑page playback queue displayed in a small always‑on‑top window, detailing style synchronization, independent lifecycle handling via a helper class, and real‑time updates using BroadcastChannel‑plus‑iframe messaging while relying solely on native web features.

Cross-Page PlaybackDocument Picture-in-PictureJavaScript

0 likes · 31 min read

Implementing a Cross-Page Playback Queue with Document Picture-in-Picture

Bilibili Tech

Aug 27, 2024 · Artificial Intelligence

Multimodal Video Scene Classification for Adaptive Video Processing

The paper presents a multimodal video scene classification system that leverages CLIP‑generated pseudo‑labels and a fine‑tuned image encoder to automatically identify nature, animation/game, and document scenes, enabling more effective adaptive transcoding, intelligent restoration, and quality assessment for user‑generated content on platforms such as Bilibili.

Bilibili multimediaCLIPMultimodal Learning

0 likes · 17 min read

Multimodal Video Scene Classification for Adaptive Video Processing