Issue extracting GPS data from Vantrue N2Pro Dashcam

[azhao]

Hi all,

Thank you for providing these resources! I'm new to exiftool and struggling to extract GPS data from a Vantrue N2Pro dashcam. I'm using exiftool ver 13.03, and I believe GPS extraction from Vantrue N4 dashcam footage is possible using exiftool.  The video footage has GPS data printed onto the video itself.

I used the command

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exiftool -ee -u -G1 "-gps*" FILENAME and the output was

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[QuickTime]     GPS Data List                   : (Binary data 928 bytes, use -b option to extract). Using

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exiftool -ee"-gps*" FILENAME returned nothing, and using

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exiftool -ee -u -G1 -b "-gps*" FILENAME returned a lot of this

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ò¼Ç<êpÇX«öÇu╪┤Çææ▄Ç¡═hÇ╦0╕ǵ|╘Ç.PÇ.

Any help would be appreciated! Please let me know if uploading a video snippet would be more helpful.

[Phil Harvey]

You second command returned nothing because there isn't a space after -ee.

Your last command returned the binary data of the GPSDataList tag, which it seems that ExifTool is unable to decode.

If you upload a sample video somewhere I'll take a look to see if I can add support for your camera.

- Phil

[StarGeek]

The video footage has GPS data printed onto the video itself.

FYI, just because the GPS data is hard-coded onto the video, it does not mean that the data will be embedded in the file. There's been a few cases on these forums where that has happened.

[azhao]

Hi Phil and StarGeek,

Thank you! I tried the command exiftool -ee "-gps*" with the space after -ee and there was also no output. StarGeek, I'll keep this in mind.

Here is a 5-second snippet of video: https://drive.google.com/file/d/1TbUogZGTdX8m8IKXucKpUIU_kqRoAr_j/view?usp=sharing. Please let me know if it needs to be longer.

[StarGeek]

Has this video been edited, i.e. has this been clipped from a longer video. I see a Microsoft tag in there that seems like it would be unusual from a dashcam.

Any editing of a video stream will remove any GPS track, as all GPS track data is non-standard and no program would know how to copy it.

[azhao]

It's been clipped from a longer video. I've included a link to a longer, unedited video: https://drive.google.com/file/d/15U90UfAa699EAugd7MEo3BJlrpwooNKb/view?usp=sharing

Please let me know if this works!

[Phil Harvey]

The GPSDataList contains pointers to freeGPS blocks.  ExifTool attempts to parse these blocks but unfortunately they contain only binary zeros, so no GPS in this file.

You can see all this with exiftool -ee -v4 FILE

- Phil

[azhao]

Hi Phil, thank you so much for taking a look! Really appreciate your time and expertise .