The classic Mac tool that prepares your footage for Gyroflow Desktop.
Mac · macOS 13 and later · Apple Silicon / Intel
Free forever · Signed by Kumo, Inc.
What it does
GyLogSync takes your video clips and the .gcsv motion log from GyLog, splits the gyro data into per-clip files, and (for iPhone ProRes RAW) fixes any frame-timing issues that break stabilization. You then finish the sync in Gyroflow Desktop with full manual control. Works with iPhone standalone (ProRes RAW + iPhone GyLog) or any other camera with a phone running GyLog mounted as the IMU.
Features
Splits the single session .gcsv from GyLog into per-clip files so each MOV has its own matching motion log.
GyLogSync's output slots into Gyroflow Desktop, where you can adjust sync offsets, rolling-shutter timing, smoothness, and crop interactively per clip. Hands-on control for shots where automated alignment isn't quite enough.
Trims the audio recorded by GyLog (iOS only) to match each video clip — used as a backup sync reference in Gyroflow. Skipped when no audio is present (e.g. logs from the Android GyLog app).
No settings, no dialogs. Drop your files onto the app, and Sync figures out which clip goes with which log.
Workflow
Shoot with GyLog running
Launch GyLog on your phone (iPhone or Android) and tap Start. For most cameras, mount the phone firmly to the camera so they share motion, run GyLog's Calibrate Mount to record the phone's angle, then shoot as you normally would. iPhone can also be used standalone — record video on the iPhone itself while GyLog logs motion on the same device, then de-shake afterward.
Transfer to Mac
Move your MOV files and the .gcsv log to your Mac — AirDrop or the Files app both work.
Drop into GyLogSync
Drag the files or their folder into GyLogSync. It fixes timing, splits the gyro log per clip, trims audio if needed, and writes the outputs in the same folder as the video files, or inside the folder you dropped.
Sync in Gyroflow Desktop
Open Gyroflow Desktop. Load each .mov with its .gcsv, tune the sync, and save a .gyroflow project file.
Stabilize in DaVinci Resolve
On the Color page, add the Gyroflow OFX plugin and load the .gyroflow file. Adjust FOV to remove black borders.
Download
Free forever. Distributed via Gumroad, with separate Apple Silicon and Intel builds available.
Get on Gumroad →macOS 13+ · Apple Silicon / Intel · Signed & Notarized