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Steven Liu

PROFILE

Steven Liu

Worked on the ossrs/ffmpeg-webrtc and FFmpeg/FFmpeg repositories to deliver robust improvements in video streaming and multimedia processing. Over five months, contributed features such as VVC codec support for FLV and RTMP streaming, enhanced HLS fMP4 encoding test coverage, and implemented protocol hardening for WHIP signaling. Addressed critical bugs in DASH segment number calculations and MPD XML value validation, preventing overflows and improving streaming reliability. Leveraged C programming, Makefile scripting, and expertise in streaming protocols to ensure maintainable, secure, and stable code. Focused on thorough testing, code cleanup, and validation to support modern media workflows and interoperability.

Overall Statistics

Feature vs Bugs

50%Features

Repository Contributions

9Total
Bugs
3
Commits
9
Features
3
Lines of code
263
Activity Months5

Your Network

377 people

Work History

June 2026

1 Commits

Jun 1, 2026

June 2026 monthly summary: Focused on stability and reliability for ossrs/ffmpeg-webrtc by addressing a critical DASH segment number overflow bug. Delivered a targeted fix that prevents negative segment URL values and HTTP 403 errors in DVB-DASH live streams, improving streaming reliability for time-sensitive content. The changes ensure correct signed arithmetic across time-related calculations and segment generation logic, with no accompanying feature regression.

February 2026

4 Commits • 1 Features

Feb 1, 2026

February 2026: Delivered end-to-end VVC codec support across FFmpeg's FLV and RTMP streaming paths, enabling muxing VVC in enhanced FLV, demuxing VVC in enhanced FLV, and RTMP compatibility for vvc1, with expanded testing coverage. This work enables modern codec delivery, improves streaming interoperability, and positions FFmpeg to better serve clients adopting VVC.

January 2026

1 Commits

Jan 1, 2026

January 2026: FFmpeg/FFmpeg—Contributed a high-impact stability fix to the DASH Demuxer by validating MPD XML values, preventing potential heap overflow. Negative values for duration, timescale, and startNumber are now clamped to zero after parsing, reducing crash risk and improving robustness for DASH streaming.

August 2025

1 Commits • 1 Features

Aug 1, 2025

August 2025 monthly summary for ossrs/ffmpeg-webrtc focusing on delivering test coverage improvements and build/validation enhancements that increase reliability of HLS fMP4 encoding tests.

June 2025

2 Commits • 1 Features

Jun 1, 2025

June 2025 monthly summary for ossrs/ffmpeg-webrtc: Focused on hardening signaling security, cleaning up code, and improving maintainability to deliver tangible business value in media workflows.

Activity

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Quality Metrics

Correctness97.8%
Maintainability86.6%
Architecture86.6%
Performance84.4%
AI Usage20.0%

Skills & Technologies

Programming Languages

CMakefile

Technical Skills

AVFormatBuild SystemsC programmingDASH protocolH.264 encodingMakefile scriptingNetwork ProgrammingProtocol ImplementationTestingVideo Encodingcodec developmentmultimedia processingsoftware debuggingstreaming protocolstesting

Repositories Contributed To

2 repos

Overview of all repositories you've contributed to across your timeline

FFmpeg/FFmpeg

Jan 2026 Feb 2026
2 Months active

Languages Used

CMakefile

Technical Skills

C programmingsoftware debuggingvideo processingMakefile scriptingcodec developmentmultimedia processing

ossrs/ffmpeg-webrtc

Jun 2025 Jun 2026
3 Months active

Languages Used

CMakefile

Technical Skills

AVFormatC programmingH.264 encodingNetwork ProgrammingProtocol ImplementationBuild Systems