Free, open-source ACMI flight recording viewer and real-time telemetry monitor.
A community-built alternative to Tacview - replay your flights, analyse engagements, and monitor live telemetry from any simulator or data source that speaks the ACMI 2.x protocol.
Tacview is excellent software - but it's closed-source, expensive at the Advanced tier, and gives you little control over how your data is processed or displayed. OpenACMI aims to change that.
- Free, forever. No subscriptions, no feature tiers.
- Open source. Understand exactly what happens to your data. Extend it, fork it, contribute back.
- Cross-platform. Runs on Windows, Linux, and macOS.
- Full ACMI 2.x support. Any simulator that can export to Tacview can export to OpenACMI - DCS World, Falcon BMS, IL-2, X-Plane, FSX, and more.
- Real-time streaming. Connect directly to a live telemetry server and watch engagements unfold as they happen.
- Built on the Godot Game Engine. Free Open Source game engine in a great state to serve the purpose of this task.
- Photorealistic Earth sphere with real-world country borders and lat/lon grid
- Accurate object placement and orientation using geodetic coordinate math
- Automatic projection of flat simulated worlds to the 3D globe
- Smart model scaling - objects remain visible at any zoom level
- Full implementation of the ACMI 2.2 specification
- Supports all object types: aircraft, helicopters, ground vehicles, ships, weapons, projectiles, navaids, static objects
- Parses all documented properties - radar, engagement ranges, G-forces, fuel, control surfaces, pilot biometrics, and more
- Delta-state handling - omitted fields correctly carry forward from previous frames
- Loads plain
.acmi, ZIP-compressed.acmi.zip, and auto-detects format from file contents
- Connects to any Tacview-compatible real-time telemetry server
- Full handshake protocol implementation
- Displays live data as it streams and saves it to file
- Seamlessly transitions between live and recorded playback
- Scrub through any recording with a timeline slider
- Smooth interpolation between snapshots for fluid playback
- Frame-step forward and backward
- All object visibility correctly driven by spawn/removal times - missiles appear when fired and disappear on impact
- Automatic model resolution: exact name matching, variant suffix stripping, type-tag fallback
- Coalition-aware object coloring - blue, red, neutral forces are visually distinct at a glance
- Bring your own
.objmodels - drop them inData/Meshes/and they're picked up automatically
- Global orbit - rotate around the Earth freely
- Tracking - follow any object from behind with adjustable offset
- Cockpit - ride inside the selected aircraft with full pitch and roll
- Free flight - fly through the scene with WASD controls
- Data grid showing all available telemetry: position, altitude, heading, speed, G-force, AOA, turn rate, vertical speed, Mach, and more
- Derived values where direct telemetry is unavailable - G-force from turn rate and airspeed, TAS from IAS and altitude, etc.
- All information panels support docking / undocking from main window
More information will become available along with the initial source release.
OpenACMI aims to support any simulator with a Tacview exporter that works out of the box or with :
| Simulator | Export Method |
|---|---|
| DCS World | DCS2ACMI |
| Falcon BMS | Built-in ACMI export |
| IL-2 Sturmovik | Built-in ACMI export |
| X-Plane | Tacview plugin |
| MSFS / FSX | Tacview plugin |
| Any source | Any server speaking the real-time telemetry protocol |
| File | Purpose |
|---|---|
ACMI_Parser.gd |
Full ACMI 2.x parser |
WorldManager.gd |
Session state, typed object dictionaries |
cBaseObject.gd |
Base class for all tracked objects |
cAircraftObject.gd |
Aircraft with full aerodynamic properties |
cWeaponObject.gd cGroundObject.gd etc. |
Typed subclasses |
cEventObject.gd |
Event log entries |
Display3D.gd |
Main 3D viewport - globe, objects, camera |
MeshLibrary.gd |
Resolves and caches 3D models by name and type |
ClientBase.gd |
Real-time telemetry TCP client |
FileManager.gd |
Basic file operations (loading/saving, recent files) |
Config.gd |
All user preferences with change signals |
ObjectTag.gd |
ACMI type tag constants |
- Windows, Linux, macOS release builds
- Exports of object telemetry to .csv
- Support for flat world non-real terrains for sims like Nuclear Option
- Charting of object telemetry
- Performance Improvements
- Save live data to file
- Enhanced 2D plan view
- Display of radar locks
- Events Log and visualization
- Weapons employment log and shot analysis
- Localization
- Tile map support - stream satellite or terrain imagery from NASA, Maptiler, Stadia, or any XYZ tile provider
- Use local game terrain heightmaps for enhanced 3D visualization
- Multi-session overlay (compare two recordings)
- Plugin API for custom data sources
- Database XML support (Tacview-compatible object definitions)
- Screenshot / video export
- Connection to ADS-B Data
- Multiplayer debrief mode (shared session over LAN)
- Multiplayer live controller mode (Custom display for live feeds)
- Implementation for *.oacm (OpenACMI File Pack) for more functionality
- File editing (Adding objects, changing parameters, etc.)
- Attachmet of cockpit display recordings to the recording (Part of *.oacm file)
Have another idea? Post it in an issue!
Contributions of all kinds are welcome - code, bug reports, 3D models, simulator-specific testing, documentation.
More information will become available along with the initial source release.
MIT License - see LICENSE for details.
You are free to use, modify, and distribute OpenACMI for any purpose, including commercial applications.
- Tacview by Frantz 'Vyrtuoz' Raia - for the inspiration and ACMI format specification that makes this possible.
- The Falcon BMS, DCS World, and IL-2 communities - for years of ACMI tooling, exporters, and feedback
- Natural Earth - country border data
- NASA Earthdata / GIBS - satellite imagery
OpenACMI is an independent open-source project and is not affiliated with Tacview or RaiaSoftware.
© Amir "Spearhead" Levy & Contributors