Change output GPS time interval using gps.fmt

[yawnbiter]

Hi all,

I've just received an MP4 file taken from a gopro7 and I've been using the following command to extract the GPS coordinates:

exiftool -ee -p gpx.fmt FILE.mp4 > FILE.gpx

I've noticed that I'm only getting a GPS point for every 1second, whereas the framerate is captured at 30fps.
Is there a setting I can either change in the fmt file or commandline to ensure that I export the gps coordinate for every frame?

Thanks!

[StarGeek]

I've noticed that I'm only getting a GPS point for every 1second, whereas the framerate is captured at 30fps.

According to Phil's answer in this post, the GPS data is not synchronized to the frame rate.  Also, here in that same thread, there is only one GPS timestamp approximately, but not exactly, every second.

Is there a setting I can either change in the fmt file or commandline to ensure that I export the gps coordinate for every frame?

Try listing the GPS data with this command to see if there is more GPS coordinates.  My understanding of that thread is that there should be more coordinates per second, but only one timestamp approximately every second
exiftool -G1 -a -s -ee -gps* FILE.mp4

[yawnbiter]

Thanks SG,

Yes, I ran that command and I definitely see that I have intermediate GPS coords in between the timestamped records - an additional 18 per second, the same as the referenced post.

Now that I know how it works, I'll be able to develop something to merge the information together and perform analysis of the GPS & Time data.

Thanks for your help!