shaka-project/shaka-player
Apr 2026 – Apr 2026
1 Month active
Languages Used
JavaScript
Technical Skills
JavaScriptsubtitle processingvideo streaming
Fredrik Höglin
PROFILE
Fredrik Höglin
Worked on the shaka-player repository to enhance subtitle reliability for HLS CMAF streams by addressing a core playback timing bug. Focused on refining WebVTT timestamp rollover handling, the developer implemented a targeted fix that restricts rollover logic exclusively to MPEG-TS streams, preventing incorrect cue timing for CMAF and fMP4 paths. This JavaScript-based solution improved subtitle accuracy and streaming stability without altering existing MPEG-TS behavior. The approach demonstrated a strong understanding of video streaming protocols, subtitle processing, and risk-limited code changes, while also involving collaboration with project maintainers to ensure the fix integrated smoothly and maintained overall playback quality.
Overall Statistics
Feature vs Bugs
0%Features
Repository Contributions
1Total
Bugs
1
Commits
1
Features
0
Lines of code
1,541
Activity Months1
Your Network
51 peopleSame Organization
@teliacompany.com2
Work History
April 2026
1 Commits
Apr 1, 2026April 2026 monthly summary for shaka-player focused on reliability improvements in subtitle timing for HLS CMAF streams. Delivered a targeted WebVTT timestamp rollover fix by restricting rollover wrapping to MPEG-TS streams, ensuring correct cue timing for CMAF/fMP4 paths without impacting existing MPEG-TS behavior. Commit c2ad355e28048b15c44e3d768fa9ceb43e69c728 was the primary change, with safeguards to avoid unintended effects on non-MPEG-TS streams. Overall impact: improved end-user subtitle accuracy and streaming stability for CMAF/HLS deployments, contributing to a smoother viewer experience. Skills demonstrated: JavaScript/TypeScript, WebVTT timing, understanding of MPEG-TS vs CMAF rollovers, risk-limited code changes, and collaboration with maintainers.
1 Commits
Apr 1, 2026April 2026 monthly summary for shaka-player focused on reliability improvements in subtitle timing for HLS CMAF streams. Delivered a targeted WebVTT timestamp rollover fix by restricting rollover wrapping to MPEG-TS streams, ensuring correct cue timing for CMAF/fMP4 paths without impacting existing MPEG-TS behavior. Commit c2ad355e28048b15c44e3d768fa9ceb43e69c728 was the primary change, with safeguards to avoid unintended effects on non-MPEG-TS streams. Overall impact: improved end-user subtitle accuracy and streaming stability for CMAF/HLS deployments, contributing to a smoother viewer experience. Skills demonstrated: JavaScript/TypeScript, WebVTT timing, understanding of MPEG-TS vs CMAF rollovers, risk-limited code changes, and collaboration with maintainers.
April 2026
Activity
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Quality Metrics
Correctness100.0%
Maintainability80.0%
Architecture80.0%
Performance80.0%
AI Usage20.0%
Skills & Technologies
Programming Languages
JavaScript
Technical Skills
JavaScriptsubtitle processingvideo streaming
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