Inverse geotagging from Akaso V1 (2019 version) dashcam footage

Started by Mickey1962, June 14, 2020, 03:53:47 AM

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Mickey1962

#30
October 11, 2020, 12:17:57 PM
Thank you, and be safe !!
-- Michel

Vasyoid

#31
August 17, 2021, 12:10:44 PM
Hello! I am currently working on an android application that plays videos recorded by a DVR and have faced the same problem. I've tried extracting GPS data from the videos using the ExifTool but this data seem to be encoded in the same format, so I just wanted to ask if there is any progress or new information in this matter.

Thanks in advance and have a nice day!

- Vasily

Phil Harvey

#32
August 17, 2021, 01:00:25 PM
No progress, sorry.  If I could get more samples with wildly different lat/lon values, I might be able to make more headway.

- Phil
...where DIR is the name of a directory/folder containing the images.  On Mac/Linux/PowerShell, use single quotes (') instead of double quotes (") around arguments containing a dollar sign ($).

Mickey1962

#33
August 17, 2021, 01:58:06 PM
Hello Phil, I can provide that. I have a full trip from Italy to Belgium.

I thought you did not have time anymore for this, hence I did not contact you again to not bother you, sorry for the misunderstanding.

I will upload 13 of them, taken from various locations of the trip. Let me know if this can help.

I will send the links in private message (just to avoid anyone to download them as they contain my conversations with my wife LOL).

Thank you again for investigating this !!!
-- Michel

Phil Harvey

#34
August 17, 2021, 02:45:29 PM
Hi Michel,

I've looked at the first one you sent.  This is TS format, not MOV like the earlier samples.  Is it the same camera?

- Phil
...where DIR is the name of a directory/folder containing the images.  On Mac/Linux/PowerShell, use single quotes (') instead of double quotes (") around arguments containing a dollar sign ($).

Mickey1962

#35
August 17, 2021, 03:58:17 PM
Hello, Phil, when I download them, they are correctly retrieved and they read OK in the Akaso Player. Maybe your browser converts them ? Maybe the easiest is to use a command line tool like curl to retrieve them ?

They are stored on the same server as the initial samples I gave you (first post of this thread), so I am pretty sure nothing is in the way there.

If curl does not work, I can force the web server to serve the files as binary octet-stream instead ?

Let me know.

-- Michel

Phil Harvey

#36
August 17, 2021, 04:10:48 PM
I need more information.  The earlier files were 2019_0524_125730_086.MOV and 2019_0524_175737_096.MOV

And I just received via email a download link for 2021_0814_233220_136A.TS -- did you send it?  If so, it definitely has a .TS extension.  My browser isn't doing that, but it is possible that the file storage host could.

- Phil

...where DIR is the name of a directory/folder containing the images.  On Mac/Linux/PowerShell, use single quotes (') instead of double quotes (") around arguments containing a dollar sign ($).

Phil Harvey

#37
August 17, 2021, 04:35:18 PM
OK.  I just found the private message you sent with the MOV videos.  Someone else must have sent the .TS file.

- Phil
...where DIR is the name of a directory/folder containing the images.  On Mac/Linux/PowerShell, use single quotes (') instead of double quotes (") around arguments containing a dollar sign ($).

Mickey1962

#38
August 17, 2021, 04:53:26 PM
Ah, I now understand the confusion ;-) No, it is not me who sent the TS.

I "only" sent the 13 .MOV as I said, from a 12 hours trip from Livorno (Italy) to La Hulpe (in Belgium). I took 1 file every 20 and it is mainly speedway so you should have a good information with steady latitude and longitude modifications.
-- Michel

Vasyoid

#39
August 18, 2021, 07:07:15 AM
I also have some sample videos but they are in MP4 format and are taken in one single place because my camera is not yet portable. I can send these videos if this helps.

- Vasily

Phil Harvey

#40
August 18, 2021, 07:39:21 AM
Hi Vasily,

Sure.  Send me one, it could be useful.  My email is philharvey66 at gmail.com

- Phil
...where DIR is the name of a directory/folder containing the images.  On Mac/Linux/PowerShell, use single quotes (') instead of double quotes (") around arguments containing a dollar sign ($).

Phil Harvey

#41
August 18, 2021, 10:44:38 AM
Mickey:  Could you send one video where the car is stationary for the entire video?  This will help to determine how the encryption is changing the bits.

Thanks.

- Phil
...where DIR is the name of a directory/folder containing the images.  On Mac/Linux/PowerShell, use single quotes (') instead of double quotes (") around arguments containing a dollar sign ($).

Mickey1962

#42
August 18, 2021, 11:10:22 AM
Sure, here they are:

Lat. 50.751449 - Long. 4.493061
https://rabozee.net/dashcamGPS/2021_0226_120349_722.MOV

Lat. 50.736581 - Long. 4.494977
https://rabozee.net/dashcamGPS/2021_0305_171520_777.MOV

You are most welcome !
-- Michel

Phil Harvey

#43
August 18, 2021, 11:40:58 AM
Hi Michel,

Great, thanks.  These help, but I need more of them.  (Longer like the other ones if possible)

- Phil
...where DIR is the name of a directory/folder containing the images.  On Mac/Linux/PowerShell, use single quotes (') instead of double quotes (") around arguments containing a dollar sign ($).

Mickey1962

#44
August 18, 2021, 11:54:28 AM
Hmmm.... Not easy, here it is normally forbidden to leave a running vehicle steady. I will try (3 minutes is OK, right ?)
-- Michel
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