software-mansion/smelter
Nov 2024 – Oct 2025
12 Months active
Languages Used
RustDockerfileShellTypeScriptYAMLJavaScriptHTMLWGSL
Technical Skills
Build SystemCargoCode RefactoringCompiler WarningsCross-Platform DevelopmentDependency Management
Mikołaj Radkowski
PROFILE
Mikołaj Radkowski
Mikołaj Radkowski engineered core media processing and rendering features for the software-mansion/smelter repository, focusing on cross-platform reliability and performance. He developed hardware-accelerated video encoding using Vulkan, integrated flexible decoding pipelines with FFmpeg and Vulkan, and enhanced audio processing with dynamic resampling and AAC support. His work included robust WebAssembly and TypeScript SDK integration, enabling browser-based clients and streamlined WASM interop. Radkowski improved system observability by modernizing logging with tracing, centralized graphics initialization using Rust and WGPU, and strengthened CI/CD pipelines for multi-architecture releases. His contributions addressed concurrency, memory management, and test automation, resulting in maintainable, scalable infrastructure.
Overall Statistics
Feature vs Bugs
79%Features
Repository Contributions
83Total
Bugs
10
Commits
83
Features
37
Lines of code
30,233
Activity Months12
Your Network
4 peopleShared Repositories
4
Work History
October 2025
6 Commits • 3 Features
Oct 1, 2025October 2025 performance overview for software-mansion/smelter. The month focused on architectural improvements, improved observability, and stability enhancements that enable faster future feature delivery and better diagnostics. Key deliverables include centralization of WGPU initialization in smelter-core to decouple graphics context setup and simplify dependency management, modernization of logging by replacing the log crate with tracing across the project, and Vk-video module enhancements to use the highest available H.264 profile for decoding along with enriched AdapterInfo (driver details, device type, and decode/encode capabilities). Critical bugs addressed include a test log typo fix to ensure correct test outputs and a LibCEF/memory reporting fix to prevent mallinfo-related crashes on Linux, improving reliability in Chromium-related environments. Overall impact: improved modularity, observability, and stability, enabling more reliable graphics features and better hardware/driver diagnostics. Demonstrated technologies/skills: Rust engineering, WGPU graphics initialization patterns, tracing-based observability, libc safety practices, integration testing, Vulkan/Vk-video capabilities, and robust testing.
6 Commits • 3 Features
Oct 1, 2025October 2025 performance overview for software-mansion/smelter. The month focused on architectural improvements, improved observability, and stability enhancements that enable faster future feature delivery and better diagnostics. Key deliverables include centralization of WGPU initialization in smelter-core to decouple graphics context setup and simplify dependency management, modernization of logging by replacing the log crate with tracing across the project, and Vk-video module enhancements to use the highest available H.264 profile for decoding along with enriched AdapterInfo (driver details, device type, and decode/encode capabilities). Critical bugs addressed include a test log typo fix to ensure correct test outputs and a LibCEF/memory reporting fix to prevent mallinfo-related crashes on Linux, improving reliability in Chromium-related environments. Overall impact: improved modularity, observability, and stability, enabling more reliable graphics features and better hardware/driver diagnostics. Demonstrated technologies/skills: Rust engineering, WGPU graphics initialization patterns, tracing-based observability, libc safety practices, integration testing, Vulkan/Vk-video capabilities, and robust testing.
October 2025
September 2025
13 Commits • 2 Features
Sep 1, 2025September 2025 — Smelter (software-mansion/smelter). This month focused on delivering a robust Vulkan Video H.264 encoding path, launching a dedicated encoder benchmarking suite, and strengthening stability and toolchain maturity. The work improves hardware compatibility, encoding performance, and release reliability, delivering measurable business value for multimedia workloads.
September 2025
13 Commits • 2 Features
Sep 1, 2025September 2025 — Smelter (software-mansion/smelter). This month focused on delivering a robust Vulkan Video H.264 encoding path, launching a dedicated encoder benchmarking suite, and strengthening stability and toolchain maturity. The work improves hardware compatibility, encoding performance, and release reliability, delivering measurable business value for multimedia workloads.
August 2025
7 Commits • 5 Features
Aug 1, 2025August 2025 focused on delivering hardware-accelerated video workflows, flexible decoding options, and maintainability improvements in the Smelter media pipeline. Key outcomes include Vulkan-based encoding for GPU-accelerated performance, per-codec decoder maps for choice between FFmpeg and Vulkan, enhanced WHIP session management, unified thread initialization across pipelines, and a Rust toolchain upgrade in CI. These changes deliver tangible business value: lower encoding latency and higher throughput, more robust session handling, easier future maintenance, and a stable development baseline for future feature delivery.
7 Commits • 5 Features
Aug 1, 2025August 2025 focused on delivering hardware-accelerated video workflows, flexible decoding options, and maintainability improvements in the Smelter media pipeline. Key outcomes include Vulkan-based encoding for GPU-accelerated performance, per-codec decoder maps for choice between FFmpeg and Vulkan, enhanced WHIP session management, unified thread initialization across pipelines, and a Rust toolchain upgrade in CI. These changes deliver tangible business value: lower encoding latency and higher throughput, more robust session handling, easier future maintenance, and a stable development baseline for future feature delivery.
August 2025
July 2025
15 Commits • 5 Features
Jul 1, 2025Concise monthly summary for 2025-07 focusing on delivering business value through robust media processing, reliability, and scalable architecture across the Smelter repository. This month centers on feature delivery for ADTS AAC decoding, dynamic resampling, and expanded HLS capabilities, alongside CI/test stability improvements and a thread-safe lifecycle mechanism.
July 2025
15 Commits • 5 Features
Jul 1, 2025Concise monthly summary for 2025-07 focusing on delivering business value through robust media processing, reliability, and scalable architecture across the Smelter repository. This month centers on feature delivery for ADTS AAC decoding, dynamic resampling, and expanded HLS capabilities, alongside CI/test stability improvements and a thread-safe lifecycle mechanism.
June 2025
5 Commits • 3 Features
Jun 1, 2025June 2025 monthly summary for the Smelter project focusing on delivering developer-facing features and quality improvements with tangible business value. Key features delivered include a Smelter Web Client enabling browser-based connections to Smelter instances via API requests, WebSocket support, and live/offline managers; WASM SDK shader management exposure with unregisterShader, plus a new useSmelter hook and SmelterOptions export to simplify WASM integration; and GIF animation state preservation across scene updates to maintain continuity in visuals. Major bugs fixed: none reported this month. Overall impact: accelerated integration capabilities for clients and clearer WASM interop, leading to faster feature adoption and smoother runtime experiences. Technologies/skills demonstrated: TypeScript SDK patterns, WebSocket integration, WASM interop, hook design, and cross-frame state management.
5 Commits • 3 Features
Jun 1, 2025June 2025 monthly summary for the Smelter project focusing on delivering developer-facing features and quality improvements with tangible business value. Key features delivered include a Smelter Web Client enabling browser-based connections to Smelter instances via API requests, WebSocket support, and live/offline managers; WASM SDK shader management exposure with unregisterShader, plus a new useSmelter hook and SmelterOptions export to simplify WASM integration; and GIF animation state preservation across scene updates to maintain continuity in visuals. Major bugs fixed: none reported this month. Overall impact: accelerated integration capabilities for clients and clearer WASM interop, leading to faster feature adoption and smoother runtime experiences. Technologies/skills demonstrated: TypeScript SDK patterns, WebSocket integration, WASM interop, hook design, and cross-frame state management.
June 2025
May 2025
4 Commits • 1 Features
May 1, 2025May 2025 — Focused on stabilizing the rendering pipeline and improving test reliability for the Smelter project. Delivered key Web Rendering subsystem enhancements addressing memory leaks, improved concurrency with an async mutex in the WebAssembly renderer, and reduced initialization overhead by creating the render handler once. Ensured end-to-end test coverage for image snapshots by updating submodules and test configuration, enabling SVG rendering tests (svg_in_view) to run correctly. Overall, these changes improve runtime reliability, reduce rendering latency, and provide more deterministic test feedback across the rendering stack.
May 2025
4 Commits • 1 Features
May 1, 2025May 2025 — Focused on stabilizing the rendering pipeline and improving test reliability for the Smelter project. Delivered key Web Rendering subsystem enhancements addressing memory leaks, improved concurrency with an async mutex in the WebAssembly renderer, and reduced initialization overhead by creating the render handler once. Ensured end-to-end test coverage for image snapshots by updating submodules and test configuration, enabling SVG rendering tests (svg_in_view) to run correctly. Overall, these changes improve runtime reliability, reduce rendering latency, and provide more deterministic test feedback across the rendering stack.
April 2025
7 Commits • 2 Features
Apr 1, 2025Summary for 2025-04: Delivered critical feature improvements and performance optimizations for software-mansion/smelter, with targeted bug fixes and code-quality work. Key features delivered include interruptible scene transitions with a testing framework and web-wasm rendering performance improvements. Major bugs fixed include Chromium embedding data handling and ts-sdk image URL fixes. Overall impact: more reliable scene updates, faster cross-platform rendering, and reduced maintenance through linting and documentation formatting. Technologies demonstrated: Rust 1.86.0 compatibility adjustments, lint fixes, test-driven development, web-wasm optimizations, and platform-specific rendering paths (macOS).
7 Commits • 2 Features
Apr 1, 2025Summary for 2025-04: Delivered critical feature improvements and performance optimizations for software-mansion/smelter, with targeted bug fixes and code-quality work. Key features delivered include interruptible scene transitions with a testing framework and web-wasm rendering performance improvements. Major bugs fixed include Chromium embedding data handling and ts-sdk image URL fixes. Overall impact: more reliable scene updates, faster cross-platform rendering, and reduced maintenance through linting and documentation formatting. Technologies demonstrated: Rust 1.86.0 compatibility adjustments, lint fixes, test-driven development, web-wasm optimizations, and platform-specific rendering paths (macOS).
April 2025
March 2025
5 Commits • 4 Features
Mar 1, 2025March 2025 (software-mansion/smelter) monthly summary: Key features delivered this month: - CI/Release workflow updated to ensure proper ARM64/AMD64 release packaging by coordinating build dependencies and waiting for both architectures to complete before final packaging, improving artifact consistency across platforms. Commit: c9915ad55808f852e03af99f967f174235aade90. - Web Shader Support and Unified Renderer Registration: Introduced web platform shader support with platform-specific headers and shader pipeline adjustments; refactored image/shader registration to a unified register_renderer/unregister_renderer API. Commit: 4dd29b4b8a49c6a57d001043906a17b6f4a0bb15. - Web MP4 Input via Blob Support: Enabled using a Blob as an MP4 input source in Smelter SDK by extending RegisterInputRequest and updating handleRegisterMp4Input to accept URL or Blob. Commit: 98a552043af724fa7b9b2ad4b19e181cb2a3ea04. - UI/Layout: Border Radius Clipping: Implemented clipping for border radius to not exceed half of the element’s smallest dimension; updated RescalerComponentParam and ViewComponentParam and added snapshot tests. Commit: 0ca21f78430d8db0766d4fc38c0b1d072f05d134. Major bugs fixed: - Web Renderer Stability: Fixed crash when multiple Smelter instances run concurrently by giving each instance a unique CEF cache path to prevent resource conflicts. Commit: a17c66e67f368c823628f07834611fc132250db1. Overall impact and accomplishments: - Strengthened cross-platform release reliability and packaging integrity, reducing post-release hotfixes and support overhead. - Expanded web capabilities (shaders, blob-based MP4 input, and unified renderer API) enabling broader usage in web contexts and smoother SDK integrations. - Improved runtime stability for concurrent multi-instance usage, reducing user-reported crashes and improving reliability. - UI polish and test coverage increased visual consistency and confidence in future UI changes. Technologies/skills demonstrated: - GitHub Actions CI workflows, cross-arch (ARM64/AMD64) build orchestration, and release packaging. - Web graphics pipeline integration ( shaders, platform headers ) and API refactoring (register_renderer/unregister_renderer). - TypeScript SDK enhancements and Blob/URL handling for media input. - CEF cache isolation for multi-instance stability and robust renderer lifecycle. - UI component param updates, clipping logic, and snapshot testing for visual correctness.
March 2025
5 Commits • 4 Features
Mar 1, 2025March 2025 (software-mansion/smelter) monthly summary: Key features delivered this month: - CI/Release workflow updated to ensure proper ARM64/AMD64 release packaging by coordinating build dependencies and waiting for both architectures to complete before final packaging, improving artifact consistency across platforms. Commit: c9915ad55808f852e03af99f967f174235aade90. - Web Shader Support and Unified Renderer Registration: Introduced web platform shader support with platform-specific headers and shader pipeline adjustments; refactored image/shader registration to a unified register_renderer/unregister_renderer API. Commit: 4dd29b4b8a49c6a57d001043906a17b6f4a0bb15. - Web MP4 Input via Blob Support: Enabled using a Blob as an MP4 input source in Smelter SDK by extending RegisterInputRequest and updating handleRegisterMp4Input to accept URL or Blob. Commit: 98a552043af724fa7b9b2ad4b19e181cb2a3ea04. - UI/Layout: Border Radius Clipping: Implemented clipping for border radius to not exceed half of the element’s smallest dimension; updated RescalerComponentParam and ViewComponentParam and added snapshot tests. Commit: 0ca21f78430d8db0766d4fc38c0b1d072f05d134. Major bugs fixed: - Web Renderer Stability: Fixed crash when multiple Smelter instances run concurrently by giving each instance a unique CEF cache path to prevent resource conflicts. Commit: a17c66e67f368c823628f07834611fc132250db1. Overall impact and accomplishments: - Strengthened cross-platform release reliability and packaging integrity, reducing post-release hotfixes and support overhead. - Expanded web capabilities (shaders, blob-based MP4 input, and unified renderer API) enabling broader usage in web contexts and smoother SDK integrations. - Improved runtime stability for concurrent multi-instance usage, reducing user-reported crashes and improving reliability. - UI polish and test coverage increased visual consistency and confidence in future UI changes. Technologies/skills demonstrated: - GitHub Actions CI workflows, cross-arch (ARM64/AMD64) build orchestration, and release packaging. - Web graphics pipeline integration ( shaders, platform headers ) and API refactoring (register_renderer/unregister_renderer). - TypeScript SDK enhancements and Blob/URL handling for media input. - CEF cache isolation for multi-instance stability and robust renderer lifecycle. - UI component param updates, clipping logic, and snapshot testing for visual correctness.
February 2025
8 Commits • 4 Features
Feb 1, 2025February 2025 monthly summary for software-mansion/smelter focused on delivering robust, high-availability web-based rendering, maintainable code, and streamlined deployment. Key outcomes include thread-safe WebAssembly rendering, improved error visibility in frame processing, higher visual fidelity for text rendering, and consolidated build/deployment tooling.
8 Commits • 4 Features
Feb 1, 2025February 2025 monthly summary for software-mansion/smelter focused on delivering robust, high-availability web-based rendering, maintainable code, and streamlined deployment. Key outcomes include thread-safe WebAssembly rendering, improved error visibility in frame processing, higher visual fidelity for text rendering, and consolidated build/deployment tooling.
February 2025
January 2025
8 Commits • 5 Features
Jan 1, 2025January 2025 Monthly Summary (software-mansion/smelter) Overview: This month delivered core Web-WASM input and media pipeline refinements, broadened platform support for ARM64, stabilized CI on macOS, and tightened Rust code quality. The work directly enhances media handling reliability, release automation, and developer efficiency, driving business value with better media throughput, cross-architecture support, and maintainable code. Key features delivered: - Web-Wasm Input Pipeline Refactor and MP4 Duration Exposure: Decoupled frame production from input logic by introducing InputFrameProducer and DecodingFrameProducer; exposed MP4 duration in the pipeline to improve media handling and UX (#906, #921). - ARM64 Release and Multi-Arch Docker CI: Added ARM64 Docker image builds and publishing; enabled multi-arch manifests and ARM64 runners to expand runtime environments for customers and CI reliability (#893, #927). - View Component Padding API: Added per-side and composite padding (top/right/bottom/left, vertical/horizontal, universal) with non-negative enforcement and proper layout integration (#931). - CEF Build and macOS CI Stabilization: Updated CEF versions, adjusted macOS CI runners, and resolved Intel Mac build issues to improve stability (#928). - Rust Code Quality and Clippy Modernization: Modernized Rust code and addressed Clippy lint issues for readability and maintainability (#915). Major bugs fixed: - MP4 Demuxer Timing Precision Bug: Fixed incorrect chunk timestamps by aligning timestamp scaling and PTS buffering to microseconds in the web-wasm decoding pipeline for accurate video timing (#912). Overall impact and accomplishments: - Improved media reliability and accuracy across Web-WASM playback, reducing desync risk and enabling precise duration reporting. - Broadened deployment footprint with ARM64 support and robust multi-arch CI, accelerating releases and widening customer reach. - Strengthened UI layout capabilities through padding API, enabling flexible, consistent designs. - Stabilized the build and CI pipeline across platforms (macOS Intel/ARM), reducing flaky releases and build times. - Elevated code quality and maintainability via Rust modernization and Clippy-ready patterns, setting a foundation for faster feature iteration. Technologies and skills demonstrated: - WebAssembly, Rust, and Web-WASM decoding pipelines - Media demuxing and timing accuracy (microsecond scale) - Docker, ARM64, multi-arch image manifests, and cross-platform CI - macOS CI tooling, CEF integration, and platform stability - Clippy linting, idiomatic Rust patterns, and code quality improvements Repository: software-mansion/smelter Month: 2025-01
January 2025
8 Commits • 5 Features
Jan 1, 2025January 2025 Monthly Summary (software-mansion/smelter) Overview: This month delivered core Web-WASM input and media pipeline refinements, broadened platform support for ARM64, stabilized CI on macOS, and tightened Rust code quality. The work directly enhances media handling reliability, release automation, and developer efficiency, driving business value with better media throughput, cross-architecture support, and maintainable code. Key features delivered: - Web-Wasm Input Pipeline Refactor and MP4 Duration Exposure: Decoupled frame production from input logic by introducing InputFrameProducer and DecodingFrameProducer; exposed MP4 duration in the pipeline to improve media handling and UX (#906, #921). - ARM64 Release and Multi-Arch Docker CI: Added ARM64 Docker image builds and publishing; enabled multi-arch manifests and ARM64 runners to expand runtime environments for customers and CI reliability (#893, #927). - View Component Padding API: Added per-side and composite padding (top/right/bottom/left, vertical/horizontal, universal) with non-negative enforcement and proper layout integration (#931). - CEF Build and macOS CI Stabilization: Updated CEF versions, adjusted macOS CI runners, and resolved Intel Mac build issues to improve stability (#928). - Rust Code Quality and Clippy Modernization: Modernized Rust code and addressed Clippy lint issues for readability and maintainability (#915). Major bugs fixed: - MP4 Demuxer Timing Precision Bug: Fixed incorrect chunk timestamps by aligning timestamp scaling and PTS buffering to microseconds in the web-wasm decoding pipeline for accurate video timing (#912). Overall impact and accomplishments: - Improved media reliability and accuracy across Web-WASM playback, reducing desync risk and enabling precise duration reporting. - Broadened deployment footprint with ARM64 support and robust multi-arch CI, accelerating releases and widening customer reach. - Strengthened UI layout capabilities through padding API, enabling flexible, consistent designs. - Stabilized the build and CI pipeline across platforms (macOS Intel/ARM), reducing flaky releases and build times. - Elevated code quality and maintainability via Rust modernization and Clippy-ready patterns, setting a foundation for faster feature iteration. Technologies and skills demonstrated: - WebAssembly, Rust, and Web-WASM decoding pipelines - Media demuxing and timing accuracy (microsecond scale) - Docker, ARM64, multi-arch image manifests, and cross-platform CI - macOS CI tooling, CEF integration, and platform stability - Clippy linting, idiomatic Rust patterns, and code quality improvements Repository: software-mansion/smelter Month: 2025-01
December 2024
2 Commits • 2 Features
Dec 1, 2024December 2024 performance summary for software-mansion/smelter: Delivered two major features and enhanced release automation, strengthening playback reliability and release velocity. The H.264 Decoder and Input Handling Improvements delivered improved EOS signaling, support for varying framerates, and refined frame memory management with FrameRef, resulting in smoother playback and more accurate timestamps. Release Automation and Docker Artifacts Renaming automated Docker image publishing as part of releases and renamed artifacts from 'live_compositor' to 'smelter', with GitHub Actions workflows to build and push images for both slim and web-renderer variants. These efforts reduced manual steps, shortened release cycles, and improved overall product stability.
2 Commits • 2 Features
Dec 1, 2024December 2024 performance summary for software-mansion/smelter: Delivered two major features and enhanced release automation, strengthening playback reliability and release velocity. The H.264 Decoder and Input Handling Improvements delivered improved EOS signaling, support for varying framerates, and refined frame memory management with FrameRef, resulting in smoother playback and more accurate timestamps. Release Automation and Docker Artifacts Renaming automated Docker image publishing as part of releases and renamed artifacts from 'live_compositor' to 'smelter', with GitHub Actions workflows to build and push images for both slim and web-renderer variants. These efforts reduced manual steps, shortened release cycles, and improved overall product stability.
December 2024
November 2024
3 Commits • 1 Features
Nov 1, 2024November 2024 monthly summary for development work on software-mansion/smelter focused on stability, compatibility, and build reliability. Key achievements include reverting a risky dependency upgrade to restore compatibility and implementing a centralized CEF binary cache to improve cross-platform builds, resulting in more stable releases and improved developer experience.
November 2024
3 Commits • 1 Features
Nov 1, 2024November 2024 monthly summary for development work on software-mansion/smelter focused on stability, compatibility, and build reliability. Key achievements include reverting a risky dependency upgrade to restore compatibility and implementing a centralized CEF binary cache to improve cross-platform builds, resulting in more stable releases and improved developer experience.
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Quality Metrics
Correctness90.8%
Maintainability89.0%
Architecture88.6%
Performance81.6%
AI Usage20.2%
Skills & Technologies
Programming Languages
CC++DockerfileGitHTMLJSONJavaScriptRustShellTypeScript
Technical Skills
API DesignAPI DevelopmentAPI IntegrationAVCCAbstractionAnimation HandlingAnnex-BAsynchronous ProgrammingAudio DecodingAudio ProcessingBackend DevelopmentBenchmarkingBrowser RenderingBug FixBuild Automation
Repositories Contributed To
Overview of all repositories you've contributed to across your timeline