Experimental direct .gyroflow project export for GyLog footage.
Mac · macOS 13 and later · Apple Silicon · Public beta
Free during the public beta · paid licensing planned once v1.0 is ready
Beta Release
GyLogSync Direct is currently in public beta. It's free to use while we expand camera support and gather feedback, but automatic sync may not work correctly with every clip or camera setup yet. For important work, use the standard GyLogSync + Gyroflow Desktop workflow. Report bugs to info@kumoinc.com.
What it does
GyLogSync Direct takes your video files and the .gcsv motion log from GyLog, then attempts to produce per-clip .gyroflow project files that open in DaVinci Resolve via the Gyroflow OFX plugin. It is an experimental shortcut, not the main recommended workflow yet.
Features
Drag video clips and GyLog's master .gcsv log. Direct slices the gyro log per clip by timestamp — no manual pairing. Set the camera and phone clocks as closely as possible (an app or manual sync) so each clip lines up with the right log slice.
Optional file picker: pick any Gyroflow lens profile JSON and Direct embeds it as calibration_data in every output, so DaVinci OFX applies lens correction automatically.
Pick Right or Left for which side the phone connector points. Mount tilt (pitch/roll) is auto-detected from GyLog's Calibrate Mount and embedded as install_angle.
Attempts 5-point optical-flow sync per clip with median outlier rejection. When it works, the offset is embedded into each .gyroflow so DaVinci OFX needs no Auto sync step.
Optional manual frame_readout_time field. Source your value from horshack-dpreview's RS database or measure it once in Gyroflow Desktop, then bake it into every batch.
Drop a whole shoot at once. Direct processes every clip and writes a per-folder CSV log with each clip's status, settings, and IMU orientation used.
Tested setups
Sony Mirrorless + Android phone
Verified end-to-end on Sony A7R II + Sony Xperia (USB-C right mount, Zeiss CP.2 25mm). Other α7 / α7R / FX bodies should behave the same.
VerifiediPhone (standalone)
iPhone records video and gyro on the same device. Auto-detected; no mount needed. Works with ProRes RAW via Blackmagic Camera (with auto VFR-to-CFR fix).
VerifiediPhone on mirrorless
iPhone mounted to a mirrorless camera as the IMU logger. Same Right/Left connector preset as Android. Not extensively tested in v2.1.1-beta — please report issues.
BetaOther Cameras
Panasonic GH/S, Fuji X-T, Canon R, Nikon Z — anything that records standard .mov or .mp4 with timestamp metadata should work via the same workflow.
Tried a camera + phone combination not listed here? We'd love to hear how it went — drop us a note at info@kumoinc.com.
Workflow
Shoot with GyLog running
Mount the phone firmly to your camera so they share motion (any secure mount works — shoe, rig, cage, bracket). Launch GyLog, tap Start, and shoot normally. One log file covers every take of the session.
Drop into GyLogSync Direct
Transfer your video files + the master .gcsv log + your lens profile to your Mac. Drag them in, set the Phone connector side (Right or Left depending on your mount), then hit Sync.
Get .gyroflow projects + a CSV report
Each clip gets a paired .gyroflow project file with sync, IMU orientation, install_angle, lens profile, and rolling-shutter values written in when available. A per-folder CSV report logs every clip's status.
Open in DaVinci Resolve
Import the video into Resolve. On the Color page, add the Gyroflow OFX plugin and load the matching .gyroflow file. For full-resolution iPhone Open Gate footage, use DaVinci Resolve Studio; the free version is limited to Ultra HD 3840x2160 output. If stabilization does not look correct, return to the standard GyLogSync + Gyroflow Desktop workflow.
Need details on mount setup, lens calibration, or rolling-shutter tuning? Read the full tutorial on GitHub →
Download
Free while in beta. Automatic sync can fail on some footage, so please treat Direct as an experimental shortcut. Email lets us reach you when v1.0 is ready, plus occasional updates and other NagiLab tools. Source code on GitHub (GPL v3).
Get on Gumroad →macOS 13+ · Apple Silicon · Signed by Kumo, Inc. · Notarized
Gyroflow is a free and open source video stabilizer and the engine behind GyLogSync Direct. If you find this workflow useful, please consider supporting the upstream project.