software-mansion/smelter
Nov 2024 – Oct 2025
11 Months active
Languages Used
JSONMarkdownRustTOMLWGSLYAMLC++JavaScript
Technical Skills
Audio ProcessingBackend DevelopmentBuild SystemsBuild ToolsCI/CDCompositor Development
Wojciech Kozyra
PROFILE
Wojciech Kozyra
Wojciech Kozyra engineered core streaming and media processing features for the software-mansion/smelter repository, focusing on modularity, reliability, and developer experience. He refactored the pipeline to support multi-format outputs and modernized input handling, enabling robust RTP, RTMP, MP4, and WHIP streaming. Using Rust and TypeScript, Wojciech centralized FFmpeg encoder configuration, improved color pipeline accuracy, and introduced dynamic input buffering for low-latency workflows. His work included architectural cleanups, build system upgrades, and enhanced documentation, which reduced maintenance overhead and improved onboarding. By unifying APIs and stabilizing the WASM pipeline, he delivered a scalable, maintainable foundation for real-time media applications.
Overall Statistics
Feature vs Bugs
74%Features
Repository Contributions
132Total
Bugs
20
Commits
132
Features
58
Lines of code
144,100
Activity Months11
Your Network
55 people
Work History
October 2025
12 Commits • 5 Features
Oct 1, 2025In 2025-10, software-mansion/smelter delivered a set of high-impact features and reliability improvements that directly support a more configurable, resilient, and developer-friendly streaming platform. The period focused on centralizing FFmpeg encoder configurations, improving infrastructure and onboarding, sharpening WebRTC/WHIP/WHEP input handling and latency control, and polishing developer-facing UX for example pages. These changes reduce configuration drift, accelerate contributor onboarding, lower maintenance costs, and improve end-user streaming reliability and latency.
12 Commits • 5 Features
Oct 1, 2025In 2025-10, software-mansion/smelter delivered a set of high-impact features and reliability improvements that directly support a more configurable, resilient, and developer-friendly streaming platform. The period focused on centralizing FFmpeg encoder configurations, improving infrastructure and onboarding, sharpening WebRTC/WHIP/WHEP input handling and latency control, and polishing developer-facing UX for example pages. These changes reduce configuration drift, accelerate contributor onboarding, lower maintenance costs, and improve end-user streaming reliability and latency.
October 2025
September 2025
22 Commits • 10 Features
Sep 1, 2025September 2025 (2025-09) focused on delivering high-impact features, hardening the media pipeline, and preparing the codebase for future scale. Key features delivered include DeckLink queue sync logic update to align with the new queue model, sending samples from queue with deadline for tighter timing guarantees, initialization of the chromium context outside the pipeline to simplify lifecycle management, and adding a /reset endpoint for operational resilience. In parallel, substantial refactoring was completed to rename and reorganize core components and crates (e.g., compositor_render to smelter_render, compositor_pipeline to smelter_core, and related libCEF crate naming), improving clarity and maintainability. The month also included targeted codebase cleanup and test structure improvements to reduce maintenance overhead and flakiness.
September 2025
22 Commits • 10 Features
Sep 1, 2025September 2025 (2025-09) focused on delivering high-impact features, hardening the media pipeline, and preparing the codebase for future scale. Key features delivered include DeckLink queue sync logic update to align with the new queue model, sending samples from queue with deadline for tighter timing guarantees, initialization of the chromium context outside the pipeline to simplify lifecycle management, and adding a /reset endpoint for operational resilience. In parallel, substantial refactoring was completed to rename and reorganize core components and crates (e.g., compositor_render to smelter_render, compositor_pipeline to smelter_core, and related libCEF crate naming), improving clarity and maintainability. The month also included targeted codebase cleanup and test structure improvements to reduce maintenance overhead and flakiness.
August 2025
4 Commits • 2 Features
Aug 1, 2025August 2025: Focused on stabilizing the streaming pipeline, improving reliability, and upgrading the build environment for Smelter. Delivered targeted improvements to RTP streaming synchronization, fixed critical parsing and rendering edge cases, and refreshed the build stack to enhance security and stability. These changes reduce runtime errors, strengthen data integrity, and enable faster, more secure deployments across the repository.
4 Commits • 2 Features
Aug 1, 2025August 2025: Focused on stabilizing the streaming pipeline, improving reliability, and upgrading the build environment for Smelter. Delivered targeted improvements to RTP streaming synchronization, fixed critical parsing and rendering edge cases, and refreshed the build stack to enhance security and stability. These changes reduce runtime errors, strengthen data integrity, and enable faster, more secure deployments across the repository.
August 2025
July 2025
14 Commits • 4 Features
Jul 1, 2025July 2025 — Smelter: Delivered key features, stability improvements, and modernization across the streaming pipeline, delivering business value through correct color representation, multi-format output, and a more modular architecture that accelerates future work. The changes reduce runtime errors, improve cross-format compatibility, and simplify maintenance and onboarding for new formats and encoders.
July 2025
14 Commits • 4 Features
Jul 1, 2025July 2025 — Smelter: Delivered key features, stability improvements, and modernization across the streaming pipeline, delivering business value through correct color representation, multi-format output, and a more modular architecture that accelerates future work. The changes reduce runtime errors, improve cross-format compatibility, and simplify maintenance and onboarding for new formats and encoders.
May 2025
4 Commits • 3 Features
May 1, 2025Concise monthly summary for 2025-05: Delivered core features and architectural improvements for software-mansion/smelter, with targeted code cleanup to reduce dead code and improve maintainability. Notable commits and outcomes underscoring business value and technical growth.
4 Commits • 3 Features
May 1, 2025Concise monthly summary for 2025-05: Delivered core features and architectural improvements for software-mansion/smelter, with targeted code cleanup to reduce dead code and improve maintainability. Notable commits and outcomes underscoring business value and technical growth.
May 2025
April 2025
8 Commits • 3 Features
Apr 1, 2025Summary for 2025-04: Completed end-to-end RTMP Output Support (server-side and TS SDK client) enabling direct streaming to RTMP servers; modularized SDK output types by splitting RTP, MP4, and WHIP into separate modules for clearer interfaces and easier maintenance; enhanced benchmarking framework with modular definitions/passes/suites, improved argument parsing, and added suites/results; fixed lint issues (remove async from useCallback) to improve code quality; updated CHANGELOG with v0.4.2 web renderer crash fixes and chromium_embedding backports for stability.
April 2025
8 Commits • 3 Features
Apr 1, 2025Summary for 2025-04: Completed end-to-end RTMP Output Support (server-side and TS SDK client) enabling direct streaming to RTMP servers; modularized SDK output types by splitting RTP, MP4, and WHIP into separate modules for clearer interfaces and easier maintenance; enhanced benchmarking framework with modular definitions/passes/suites, improved argument parsing, and added suites/results; fixed lint issues (remove async from useCallback) to improve code quality; updated CHANGELOG with v0.4.2 web renderer crash fixes and chromium_embedding backports for stability.
March 2025
16 Commits • 5 Features
Mar 1, 2025March 2025 monthly summary for software-mansion/smelter. Delivered significant media and rendering improvements across the WASM Smelter pipeline with strong business value and developer impact. Key outcomes include enabling MP4 audio support in WASM Smelter with robust metadata handling, enhanced rendering performance and flexibility through multiple rendering modes (GPU, CPU, WebGL) and color space configuration, and a refactored core rendering architecture with cleaner APIs and improved logging. In addition, the team delivered a better developer experience via an interactive playground, upgraded demos and documentation, and added GraphicsContextOptions for a configurable libvulkan path. CI workflows were consolidated and dependencies updated to improve stability and maintenance.
16 Commits • 5 Features
Mar 1, 2025March 2025 monthly summary for software-mansion/smelter. Delivered significant media and rendering improvements across the WASM Smelter pipeline with strong business value and developer impact. Key outcomes include enabling MP4 audio support in WASM Smelter with robust metadata handling, enhanced rendering performance and flexibility through multiple rendering modes (GPU, CPU, WebGL) and color space configuration, and a refactored core rendering architecture with cleaner APIs and improved logging. In addition, the team delivered a better developer experience via an interactive playground, upgraded demos and documentation, and added GraphicsContextOptions for a configurable libvulkan path. CI workflows were consolidated and dependencies updated to improve stability and maintenance.
March 2025
February 2025
32 Commits • 16 Features
Feb 1, 2025February 2025 (2025-02) monthly performance summary for software-mansion/smelter. The team delivered tangible web, SDK, and tooling improvements that enhance developer experience, product stability, and distribution reliability.
February 2025
32 Commits • 16 Features
Feb 1, 2025February 2025 (2025-02) monthly performance summary for software-mansion/smelter. The team delivered tangible web, SDK, and tooling improvements that enhance developer experience, product stability, and distribution reliability.
January 2025
5 Commits • 2 Features
Jan 1, 2025January 2025 performance summary for software-mansion/smelter: Stabilized runtime, boosted performance, and expanded streaming capabilities through targeted bug fixes, web worker refactor, and WHIP integration. Key outcomes include robust resource cleanup across Node.js and browser, offloaded core processing to web workers with new camera and screen capture inputs, and WHIP client support with configurable audio sample rates and related queue improvements. These changes deliver greater stability, faster pipelines, and broader streaming functionality, aligning with customer needs and business value.
5 Commits • 2 Features
Jan 1, 2025January 2025 performance summary for software-mansion/smelter: Stabilized runtime, boosted performance, and expanded streaming capabilities through targeted bug fixes, web worker refactor, and WHIP integration. Key outcomes include robust resource cleanup across Node.js and browser, offloaded core processing to web workers with new camera and screen capture inputs, and WHIP client support with configurable audio sample rates and related queue improvements. These changes deliver greater stability, faster pipelines, and broader streaming functionality, aligning with customer needs and business value.
January 2025
December 2024
6 Commits • 4 Features
Dec 1, 2024December 2024 monthly summary for software-mansion/smelter focused on delivering offline rendering capabilities and improving observability, documentation, and dependency stability. The month delivered several user-facing and developer-facing improvements that enhance offline workflows, debugging, and team productivity, while setting the foundation for future feature work.
December 2024
6 Commits • 4 Features
Dec 1, 2024December 2024 monthly summary for software-mansion/smelter focused on delivering offline rendering capabilities and improving observability, documentation, and dependency stability. The month delivered several user-facing and developer-facing improvements that enhance offline workflows, debugging, and team productivity, while setting the foundation for future feature work.
November 2024
9 Commits • 4 Features
Nov 1, 2024November 2024 (Month: 2024-11) — Focused on delivering visual fidelity, robust testing, and runtime stability for the Smelter compositor. Key features delivered: - Visual styling: Added support for border, border-radius, and box-shadow in the compositor layout; enhanced View and Rescaler; box-shadow rendering now aligns with CSS specifications. - Snapshot testing infrastructure: Split and unify snapshot updates, introduced update_snapshots flag, and added tests for audio streams and YUV conversions. - Dependency/CI/Tooling: Updated H264 reader source, upgraded wasm-bindgen, and aligned Rust toolchain in CI for stable builds. - Live compositor observability: Implemented file-based logging via LIVE_COMPOSITOR_LOG_FILE with updated docs and tests. Major bugs fixed: - Rendering accuracy improvements corrected box-shadow and border rendering to match CSS specs, reducing layout inconsistencies. - Test reliability improvements: snapshot tests are more maintainable and less flaky; test suite now avoids system font dependencies. - CI stability: fixes around WASM types generation and cleanup of LFS references to ensure repeatable builds. Overall impact: stronger visual fidelity, faster iteration cycles, and clearer debugging, delivering tangible business value through more reliable releases. Technologies/skills demonstrated: Rust, WASM-bindgen, CSS-like layout modeling, testing infrastructure, CI/CD, and logging instrumentation.
9 Commits • 4 Features
Nov 1, 2024November 2024 (Month: 2024-11) — Focused on delivering visual fidelity, robust testing, and runtime stability for the Smelter compositor. Key features delivered: - Visual styling: Added support for border, border-radius, and box-shadow in the compositor layout; enhanced View and Rescaler; box-shadow rendering now aligns with CSS specifications. - Snapshot testing infrastructure: Split and unify snapshot updates, introduced update_snapshots flag, and added tests for audio streams and YUV conversions. - Dependency/CI/Tooling: Updated H264 reader source, upgraded wasm-bindgen, and aligned Rust toolchain in CI for stable builds. - Live compositor observability: Implemented file-based logging via LIVE_COMPOSITOR_LOG_FILE with updated docs and tests. Major bugs fixed: - Rendering accuracy improvements corrected box-shadow and border rendering to match CSS specs, reducing layout inconsistencies. - Test reliability improvements: snapshot tests are more maintainable and less flaky; test suite now avoids system font dependencies. - CI stability: fixes around WASM types generation and cleanup of LFS references to ensure repeatable builds. Overall impact: stronger visual fidelity, faster iteration cycles, and clearer debugging, delivering tangible business value through more reliable releases. Technologies/skills demonstrated: Rust, WASM-bindgen, CSS-like layout modeling, testing infrastructure, CI/CD, and logging instrumentation.
November 2024
Activity
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Quality Metrics
Correctness91.4%
Maintainability91.2%
Architecture90.0%
Performance84.0%
AI Usage21.0%
Skills & Technologies
Programming Languages
BashC++CSSDockerfileGoHTMLJSONJavaScriptMarkdownNix
Technical Skills
API DesignAPI DevelopmentAsset ManagementAsynchronous ProgrammingAudio DecodingAudio EncodingAudio ProcessingAudio processingBackend DevelopmentBenchmarkingBrowser DevelopmentBuffering StrategiesBug FixBug FixingBuild System Configuration
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