Alex (@pioner_dev) header
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React Native dev @margelo_com https://teapaw.org/t.co/XJtV6KI1aK

Valencia, Spain
Joined October 2021
Photo by Alex (@pioner_dev)Photo by Alex (@pioner_dev)Photo by Alex (@pioner_dev)Photo by Alex (@pioner_dev)Photo by Alex (@pioner_dev)Photo by Alex (@pioner_dev)Photo by Alex (@pioner_dev)Photo by Alex (@pioner_dev)Photo by Alex (@pioner_dev)Photo by Alex (@pioner_dev)
Building a video editor SDK for React Native, powered by Nitro ⚡️ Trim, layer, add effects, and export with native performance — using your own UI. Here’s a first look 🎬 #ReactNative #nitro
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Video Editor SDK update 🧱 Layers (new) • Multiple video layers: PiP, split • iOS: export, preview, live edits • Android: export, preview, audio • Masks + chroma key on iOS 🎬 Transitions • iOS and Android: Metal / GL, live preview • Frame-accurate flip, no playhead jump • HDR clips back to back, stable export 🎧 Audio • Master true-peak limiter 🍎 iOS • Smoother edits while playing • Export near hardware encoder limit • Fewer allocations per frame 🤖 Android • Chunked proxies for long sources • Faster editor open and export start • Media3 seek fixes bundled in • Grade / LUT ✂ Both platforms • Same fps on VFR with edit lists • Odd MP4s (cover art) just work 🧠 Shared C++ core • Document, commands, undo/redo • Clipboard, duplicate, repeat loop • Versioned project save/load • C ABI + Swift/Kotlin/RN facades
🤖 Made with AI
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Video Editor SDK update 🎧 Audio • -14 LUFS normalize • Ducking, true-peak limiter • Clip boost up to +12 dB 🍎 iOS • Own VideoToolbox paused frames • Trim on pause: 90-161 → 40-61 ms • Paused edits p95: 88 → 35 ms • Fixed playhead jumping back on pause 🤖 Android • Own MediaCodec scrub (opt-in) • 100 sessions, 0 stale/black frames • Scrub frames identical to export • Preview: crop, rotation, keyframes • Preview: text overlays, blur-fill • Background export via service • Worked around Media3 same-ms seek skip • Fixed silent audio after scrub ✂ Both platforms • Frame-exact trims at 23.976 fps and VFR • Fixed neighbour-frame bug, preview + export • Clip speed plays live in preview 🎬 Transitions • Android export shaders done • iOS preview in progress 🧠 Shared C++ core • Undo/redo history moved in
🤖 Made with AI
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Today's Video Editor SDK update: • iOS: animated overlays (enter/exit, fades) in preview and export • Android: photo clips rebuild 9× faster in preview on a Galaxy A13 (1.39 s → 0.15 s) • Found a Media3 bug that drops frames at open-GOP clip ends, sent a fix upstream • editor open → first frame: iPhone 13 313 → 226 ms, iPhone 16 Pro 256 → 184 ms • play after seek on iPhone 13: ~0.5 s → ~0.2 s • blur-fill backgrounds: planned in the shared C++ core, GPU passes next
🤖 Made with AI
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video-editor SDK updates: • Frame-exact scrubbing • iOS color grading, curves & 3D LUTs in preview + export • Paused preview edits on iPhone 13: 44 → 27 ms median • Audio time-stretching: 46–62% less CPU time in Galaxy A13 / Pixel 8a benchmarks
🤖 Made with AI
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react-native-text-stream 0.2.0 is out 🔥 • Native streaming Markdown • Images, tables, task lists & highlighted code • Native SSE/NDJSON parsing for OpenAI, Anthropic & Ollama • No JavaScript callbacks per chunk
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react-native-sync-tasks 0.2.0 is out 🚀 • Native HTTP, no Rust: 51 MB → 27 kB • ETag/304, backoff, jitter, timeouts • POST/PUT/PATCH/DELETE + response headers • stop() aborts in-flight requests • New Architecture, RN 0.77+ github.com/pioner92/react-na…
🤖 Made with AI
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react-native-auto-skeleton 0.1.33 is out 🦴 • No more hidden views after unmount (iOS) • Old Arch gradient crash fixed • Correct shapes in TouchableOpacity • Android builds on AGP 9
🤖 Made with AI
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Metalterm 0.2.1 is out • Ctrl shortcuts work on non-Latin layouts, incl. Claude Code • Korean & other IMEs compose in Find and the palette • No more window flash when switching tabs • zsh history shared with your other terminals • Fixes for fast-syntax-highlighting and Pure
🤖 Made with AI
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Ooooh my goooood, this is insane 🔥🔥🚀
Introducing Mobile Dev: full mobile dev tooling right in your Codex app ✨
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Great news 🔥🔥🔥
Announcing Apex: agentic coding model for mobile and web, specialized in React. We built Apex from a single idea: can an open-weight model deliver frontier-level performance at lower cost? Yes. Apex is SOTA in React Native and Next.js. Try it now: apex.callstack.com
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Metalterm 0.2.0 🔥🔥 • New tab engine — instant, accessible, drag tabs between windows without restarting your shells • Tab status badges: pulse while a command runs, confirm success, keep failures you missed
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I just built one of the fastest mobile media-encryption demos in React Native. A 2.21 MB photo, encrypted and decrypted entirely on-device with OpenMLS: 38.3 MB/s encrypt 46.5 MB/s decrypt Rust + Nitro Modules + zero-copy JSI. Full native performance, exposed through React Native. – at Berlin, Germany
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Metalterm 0.1.12 is out ⚡️ - Custom flat themes with Ghostty and Kitty import - Windows return to their macOS Spaces with splits and pane directories - Responsive typing across native tabs - Better wrapped links, Unicode Find, emoji, and display recovery
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