GoPro telemetry overlay

From your GoPro files to a video with telemetry

Lap times, delta, track map, speed and G-meter burnt into your on-board video, in a few minutes and without any video upload. Pick the case that matches your files: the steps are the same afterwards.

Import my files Create a free account

On-board video with the gauges burnt in: lap time, delta, braking point, G-meter, speed and track map

Chasing a rival: the delta to the best lap and the speed on the video, frame by frame

A GoPro and a laptimer

The most precise: the laps and the channels of your laptimer, the images of the GoPro.

Import the file of your laptimer: AiM, Unipro, Alfano, MyChron, RaceBox, VBO...
Choose the GoPro video: it is synchronized by its GPS time, even when the laptimer records the local time
Check it once on a crossing of the line, adjust it frame by frame if needed

The GoPro alone

No laptimer? The GPS of the camera is in the video file.

Drop the MP4 files on the import page, all the chapters of a recording together
Only the GPS is sent: the video stays on your computer
Laps calculated on the circuits known by LapViz
Close to a laptimer with a good satellite signal; LapViz warns you when it was weak

A video already on YouTube

Your video is online and the original file is gone from the camera.

Add the YouTube link to your session
Synchronize it on the frame where you cross the line
Preview the overlay over the YouTube video, then export it for the original file if you still have it

Tips for a good result

Two minutes of preparation in the paddock save the evening.

Turn the GPS on in the settings of the GoPro (except the HERO12 Black, which has none)
Switch the camera on a few minutes before going out, the time to get a GPS fix
Keep every chapter of a long recording (GX01..., GX02...)
For the gauges alone, export them at the resolution and frame rate of your video

From the files to the video

The same steps whatever your case.

Import your session: the file of your laptimer, or the MP4 files of the GoPro alone
Open the session, then "Video overlay"
Choose the video on your computer: lap 1 is placed from the GPS time of the video
Choose and place the gauges: lap times, delta to a reference lap, track map with the ghost, speed, G-meter
Export the finished MP4 video, with the gauges and the sound, or the gauges alone for your video editor
Publish it: YouTube, Instagram, or the group of your team

Frequently asked questions

Is my video uploaded?

No. The video is read in your browser: for the synchronization, LapViz reads only the time of the video; for an import without a laptimer, only its GPS track is sent.

Which GoPro cameras work?

The GoPro cameras with a GPS, from the HERO5 Black: the GPS track and its time are in the video file. The HERO12 Black has no GPS: it can still be synchronized by hand with the data of a laptimer.

Does LapViz make the final video?

Yes: choose "Finished MP4 video" and LapViz makes your video with the gauges burnt in, the sound of the camera kept, ready for YouTube or Instagram. Best in Chrome or Edge, which read the HEVC videos of the GoPro and write the video straight to a file. To edit it yourself, export the gauges alone, as a transparent video or a sequence of images.

Lap 1 is a little off in the video, why?

The line of the laptimer is not always exactly at the line painted on the track. Pause the video on the crossing of the line and click on "Starts at the current frame", or adjust by one frame.

My GoPro had no GPS fix, does it still work?

For the synchronization, yes: LapViz then uses the clock of the camera, approximate, and asks you to check it on a crossing of the line. For laps without a laptimer, no: without a fix, the camera records no position.

The video is split into several files, what do I do?

Drop every file of the recording together on the import page: LapViz puts the chapters back in order and makes one session. For the overlay, choose the chapter you want to edit: each one is synchronized on its own.