Hi,
I've recently bought a Veement T90X dual channel dashcam.
The only software on PC which can playback its recorded videos with GPS preview is the included GXPlayer from sunningsoft and roadcam app on android which are both very crappy and slow and hang whenever trying to fast forward or pause videos.
I am new to exiftool and have tried multiple commands from tutorial videos on the net but the metadata I get from the videos does not include any GPS data.
Would appreciate it if this sample video could be checked and see if there's any hope of extracting GPS info to be used with other software later on...:
SampleVideo (https://drive.google.com/file/d/1fyX8LrSHEuCvrrYmvWM6AaIst6viKRdM/view?usp=sharing)
Thanks in advance.
I checked your file and exiftool doesn't find any GPS data in it.
This will require Phil's attention (exiftool's dev) to see if he can find any GPS data in the file, but he is currently away until next week. If you want to get an email when there is an update, there is a dropdown you can in the upper/lower right corner of this thread which currently would say "No alerts or emails".
Just to verify, this video is directly from the dashcam and has not passed through any social media (Facebook, Instagram) or been re-encoded (handbrake, ffmpeg)?
Quote from: StarGeek on December 02, 2023, 09:36:24 AMI checked your file and exiftool doesn't find any GPS data in it.
This will require Phil's attention (exiftool's dev) to see if he can find any GPS data in the file, but he is currently away until next week. If you want to get an email when there is an update, there is a dropdown you can in the upper/lower right corner of this thread which currently would say "No alerts or emails".
Just to verify, this video is directly from the dashcam and has not passed through any social media (Facebook, Instagram) or been re-encoded (handbrake, ffmpeg)?
Yes the video is copied directly from the dashcam's micro sd card.
If you play the same file using GXPlayer then it will show the GPS route, car speed, and car direction along with the video as well.
This is the link to the GXPlayer app included in the dashcam's sd card. (http://www.sunningsoft.com/en/pcgps.html)
It's a very laggy and bad player :'(
& Thanks for the email notification tip.
Taking a further look at the file with the -v (-verbose) option (https://exiftool.org/exiftool_pod.html#v-NUM--verbose), I can see what is probably the GPS data at the with a header of LIGOGPSINFO
Unfortunately, this might be the same as previous GPS tracks where the data is obfuscated and it isn't currently know how extract the data. See this post (https://exiftool.org/forum/index.php?topic=15387.msg82644#msg82644).
Yes. Unfortunately there are a number of cameras using this obfuscated GPS format. I'm still hoping that someone will decode this because I wasn't able to do this myself.
- Phil
I spent a lot of time on this and have figured it out.
ExifTool 13.07 will have the ability to extract GPS from this video.
- Phil
Quote from: Phil Harvey on December 10, 2024, 03:17:45 PMI spent a lot of time on this and have figured it out.
ExifTool 13.07 will have the ability to extract GPS from this video.
- Phil
Honestly I am shocked to see you are still following this subject after so long, Respect for your dedication and efforts man!
I had just been watching my dashcam videos with plain video players for the past year and gps function was going to waste, I'm at work and just saw your reply pop up in my mail, can't wait to get back home and try the new version to remake my videos and be playable with gps players....
Much appreciated and wish you the best.
It took me a couple of years to accumulate enough samples to have a good cross-section of the different variations of this type of encryption. I decided last week that I had enough to go for it, and spent a solid 7 days working on this. I'm nearly ready now, and version 13.07 should be released later today.
There were 11 distinct variations within the samples that I have accumulated, and the new version decodes the GPS from all of them.
- Phil