0

I have imported a time-lapse (1 frame/sec resolution) video from my GoPro Hero4 into VIRB Edit. It's from a 96 minute bike ride, which shows up as a 4 minute video.

When I import GPS/GPX data from my Garmin Fenix 5, it does not align with the video. It sees it as a 4 minute bike ride. (VIRB Edit use this data to make route overlays on the video.)

How to make VIRB Edit properly recognize the video as a time-lapse? Or how do I "compress" the GPX so that it matches the video?

0

A way to solve this is to first losslessly change the frame rate of the GoPro video to 1 frame/sec, which changes it from 4 minutes to real time (96 minutes).

This answer explains how to extract the raw bitstream from the GoPro video using ffmpeg:

ffmpeg -y -i gopro.mp4 -c copy -f h264 gopro_raw.h264

.. and then remux it with a 1 frame/sec frame rate:

ffmpeg -y -r 1 -i gopro_raw.h264 -c copy gopro_remuxed.mp4

Import the remuxed file into VIRB Edit [VE], add the GPX file and add some G-Metrix gauges. Finally speed it up again in VE.

VE can only speed up 800%, so the video has to be re-imported* after the initial export. Speed it up and export again to come back to the original 4 minute length. Not ideal, but it works.

* I actually had to use iMovie in the second step, since VE kept crashing

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.