Synclay

Sync your multi-cam GoPro/DJI footage into one PiP video

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Synclay is available for macOS and Windows. Star us on GitHub for updates.

How It Works

Synclay makes multi-camera video editing effortless with a simple 4-step workflow:

1. Drop your videos

Point Synclay at your video folder. It automatically detects simultaneously recorded pairs based on metadata timestamps.

2. Auto-sync via audio

Frame-accurate synchronization using audio cross-correlation. No manual alignment needed.

3. Preview & adjust

Real-time playback with timeline, waveforms, and drag-and-drop PiP positioning. Choose your crop preset for social media.

4. Export

Production-quality FFmpeg render with automatic quality presets based on resolution.

Why Synclay

Frame-Accurate Audio Sync

Audio cross-correlation analyzes the waveforms from multiple cameras and aligns them to the exact frame — no clapping, no timecode, no manual adjustment needed.

Telemetry Overlays

Import AIM or Alfano telemetry data and overlay live gauges, GPS mini-maps, trace graphs, and ghost lap comparisons directly onto your video — all burned into the final export.

Any Format, Any Platform

Export in landscape or portrait — perfect for YouTube, Instagram, TikTok, or any social media. Extract video thumbnails directly from the app to complete your post.

Installation

Download the DMG file using the button above
Open the DMG and drag Synclay to your Applications folder
Launch Synclay from your Applications folder

Synclay is code-signed and notarized by Apple, so it installs and runs without any security warnings.

Download the .exe installer using the button above
Run the installer (it will install to Program Files)
Launch Synclay from the Start menu

Windows may show a SmartScreen warning since the app is not yet code-signed. Click "More info" then "Run anyway" to proceed.

System requirements: Windows 10 or later (64-bit)

Roadmap

What We've Shipped

v1.0 MVP (Feb 2026): Audio sync engine, PiP preview with real-time playback, FFmpeg export with quality presets
v1.1 Timeline & Polish (Feb 2026): Dual-track audio waveforms, timeline zoom and navigation, crop presets for social media (1:1, 16:9, 9:16), undo/redo for manual adjustments
v1.2 Distribution (Feb 2026): macOS DMG installer, GitHub release infrastructure, this marketing site
v1.3 Telemetry & Flexibility (Feb 2026): AIM CSV telemetry import with auto-pairing, draggable dashboard widgets (speed, RPM, g-force gauges, GPS mini-map), telemetry timeline lane with lap markers, manual video/telemetry grouping, portrait mode support, single-video + telemetry projects, canvas-to-FFmpeg telemetry export
v1.4 Bug Fixes + Enhancements (Feb 2026): One-click auto-sync (audio + telemetry), sync result caching for instant re-loads, numeric offset input dialog, widget position persistence per project, quick save/load layout templates per aspect ratio, portrait export fixes, telemetry overlap calculation in export
v1.5 Features & Polish (Feb 2026): Arc gauge gradient styling with 3-color picker, "By Lap" export trim with dual-handle range selector, keyboard shortcuts (M/P/T for track selection), swap confirmation dialog, save layout template improvements
v1.6 Apple Developer (Feb 2026): Code-signed and Apple-notarized builds, DMG installer with stapled notarization ticket, no more Gatekeeper workarounds
v1.7 Enhancements & Windows (Mar 2026): Windows NSIS installer, cross-platform font loading, dual-platform GitHub releases
v1.8 Telemetry Trace + Ghost Lap (Mar 2026): Telemetry trace widget (throttle/brake history with line graph), ghost lap widget (current vs reference lap with sector deltas), aspect ratio override per project, auto-group telemetry, timestamp sorting, hide/show groups
v1.9 Alfano, Image Widget & GoPro Chapters (Apr 2026): Alfano telemetry support (ZIP import from ADA PROFESSIONNEL), vendor-agnostic telemetry abstraction layer, static image/logo widget with drag/resize/opacity and global persistence, GoPro HERO6+ chapter auto-stitching with background merge, PiP edge snap fix
v1.10 Widget Enhancements, Smart Sync & Windows Polish (Apr 2026): First-movement auto sync (eliminates pit/idle offset by detecting first motion in video + telemetry), smart Auto Sync button (only shows when syncing is meaningful, cached groups skip straight to Open Project), mini-map color schemes (speed gradient and sector color bands), ghost lap comparison trace strip with telemetry-defined sectors, trace widget vertical label and value-inside-bar, HEVC codec warning on Windows with Microsoft Store deep link
v1.11 Docs, E2E Testing & Widget Controls (Apr 2026): Dark-mode documentation site overhaul with 12 new per-area guide pages (List View and Project View workflows) and reference pages (recording best practices, telemetry formats); arrow-key nudge for selected widget/PiP (1px Arrow, 10px Shift+Arrow with three-way key routing); fill-width and center-horizontal/vertical placement actions for widgets and PiP; PiP selection state with visual indicator; WebdriverIO E2E testing foundation (9 specs, 44 tests against compiled binary)
v1.12 Widget Unification Migration (Apr 2026): Architectural release — widgets now render through a single canonical Canvas-2D code path shared between preview and export. The parallel Rust render layer is gone (-2,783 LOC widget_render.rs + -757 KB embedded font asset). Exports are 13% faster on a 4K karting fixture (246 s median vs 283 s v1.11 baseline) thanks to a Tauri binary IPC protocol (single invoke per frame) and a Rust SIMD bbox compositing step. New visual regression CI gate (23 tests, 20 reference PNGs at 1080p+4K, < 60 s on macos-latest) prevents silent rendering drift on every PR. Same widgets, same look, faster exports, simpler codebase
v1.13 Widget Pack & Faster Editing (May 2026): Three new overlay widgets — Static Text (no-telemetry text overlay with font size and background opacity), Lap Time Indicator (current/best/last lap in M:SS.mmm, multi-instance with per-instance mode), and G-Force (2D traction circle with 1G/2G reference rings, configurable X/Y telemetry columns and Max G scale, empty-channel placeholder). Faster widget editing: Shift+click multi-select with bulk drag (anchor snap, followers track delta — relative spacing preserved), bulk arrow-nudge, and bulk Background Opacity slider with "Mixed" caption when selected widgets diverge; snap-to-grid for widget movement with Alt-bypass for fine positioning; copy/paste widgets with Cmd/Ctrl+C and Cmd/Ctrl+V

Coming Soon

Pro Features

Multi-camera support (3+ cameras)
All video formats (MKV, MOV, AVI)
PiP transitions (fade, slide)
Audio/video filters
GPU-accelerated encoding