Gps filter wont Sync

[Ricky79]

I have been trying to get the data to sync with video. If i get the data to display it does not change with video. Any Suggestions?

[PaulusMaximus]

See if this helps

Please test BETA version 21.08

You need to sync (offset) the gps with the video file. For a quick start I recommend the 3rd sync button to see some output and then correct the offset from there (see more details in the tutorial linked by brian above).

[Sintre]

What location are you talking about?

[Ricky79]

Thanks for your reply Paulus.

I have clicked on the 3rd button and others and just won’t sync. I have looked over tutorial. I am attaching a document that has a portion of the raw data maybe that might be the problem. I convert it to gpx. Does the Speed options come into play as far as syncing do they need to be increased or decreased? Thanks!

2022-02-28_110631.pdf (49.6 KB)

[Ricky79]

Hi Sintre,

If your talking about where in the world, this is AIS data over the water in southeast Alaska, Thx!

[PaulusMaximus]

I have just tried on the latest version of Shotcut, 22.01.30. As soon as I click the 3rd button in, it displays the telemtry. I then play the video and the GPS data changes over time.

Here is the data I used.

[Ricky79]

Paulus,

Not sure what I am doing wrong. I clicked 3rd button but, you can see no data in video box. I’ll keep trying. Thanks for Responding:)

[daniel47]

Looking at this data in the .pdf it seems there is a very long time between the points, for example there is a 6 minute gap between 1st and 2nd points, same with 2nd and 3rd, etc. If this is the entire data set then it’s too unreliable to process.
Regular GPS tracks have ~1 second intervals.

If you open the track in any other program (I use GPXsee on windows) does it show the track and details?

[Ricky79]

Hi Daniel47,

Yes, this data is at best 1 minute increments, Sometimes several minutes. Thought I would give it a try see if it would work. Thanks Much!

[Elusien]

You might be interested in this utility I created last year to show GPS-recorded speed and elevation in graphical form.

Animated Speedometer & Altimeter for GPS data

I have created an HTML file that you can use to display speed information (such as obtained from a CPS Tracker device) as a speedometer (and elevation data as an altimeter). It uses a javascript library described here: The data needs to be in the GPX XML format. If your data is not in this format you can try converting it here: GPS Visualizer: Convert GPS files to plain text or GPX You can easily record the animation (e.g. using the html as a browser-source in OBS Studio) and include the ani…

[Ricky79]

Thanks Elusien!!

This looks intriguing, will definitely give it a try.

[Ricky79]

Daniel47,

You were right. I interpolated data in the original data set and now the sync is working, Woo-hoo!

Thanks For your Help!!

[daniel47]

Glad it worked out.

There’s an intentional “pause” detection in the algorithm that detects long gaps (10+ seconds if I’m not mistaken) in the gps points and pauses processing for the gap (I’m was mostly thinking of land usage where a car goes through a tunnel and any calculations there would be wrong). I might go around changing that gap detection to something dynamic like the average time between 2 consecutive points in a future update to support this kind of long&rare tracks.

[Ricky79]

That would be Great, would like to have actual data not, added. The data I often use is not every second, the best is every minute often with gaps of 5, 10, 15 mins or more.

Will try with my Drones data and see if I get the desired result.
Many Thanks!