Extracting geo tags from h264 video

[epsi1on]

Hi all,
i have a bunch of completely same format avi files (RIFF). I've analysed one of them with media info and putted the result at the end of this post.
All videos are taken by 'Garmin dash cam 20' which geographically tags the video at the same time that video is encoded and make it possible to see lat/lon of position of camera at each second of video. ok?
There are many dash cam video players that while they playing the video, also they show the position of camera on a map beside the playing video (see this screenshot for example). All of them are able to play video but non of them (expect Garmin dash cam player) are not able to detect geotags! These are dash cam players i've checked my video:
- Action Cam
- Cobra Dash Cam Player
- DATAKAM
- DODPlayer
- DashCam viewer

As I've said only Garmin dash cam player was able to show geo position while playing the video. This is all files that GDC (Garmin Dash Cam) player have installed and uses them to extract geo info from videos (maybe be useful to find out how it works behind the scene)



What i need to know is to find a way to pragmatically extract only the Latitude and Longitude info at each second of video. A good alternative would be a console executable file that gets video file address from execution parameters and process video file and writes the result into a text file etc.

This is a very small commercial app and actually i'm not a video nerd, i do not know much about video so i can pay up to $150 for such an application (I'm also a freelancer!!!).

This is also example video that is taken with camera, final application should work with this file (and file only like this, with same format)

https://goo.gl/3g77EO

This video plays fine in GDC player and shows lat/lon in map while playing video.

A very good application was "AVCHD2SRT" (available from here also here) this was exactly what i need but unfortunately it do not work with my videos.

Media info output on my file:

General
Complete name                    : *!\VDO.avi
Format                           : AVI
Format/Info                      : Audio Video Interleave
File size                        : 6.68 MiB
Duration                         : 6s 2ms
Overall bit rate                 : 9 343 Kbps

Video
ID                               : 0
Format                           : AVC
Format/Info                      : Advanced Video Codec
Format profile                   : Main@L4.1
Format settings, CABAC           : Yes
Format settings, ReFrames        : 2 frames
Codec ID                         : H264
Duration                         : 6s 0ms
Bit rate                         : 9 124 Kbps
Width                            : 1 920 pixels
Height                           : 1 080 pixels
Display aspect ratio             : 16:9
Frame rate                       : 30.000 fps
Color space                      : YUV
Chroma subsampling               : 4:2:0
Bit depth                        : 8 bits
Scan type                        : Progressive
Bits/(Pixel*Frame)               : 0.147
Stream size                      : 6.53 MiB (98%)

Audio
ID                               : 1
Format                           : ADPCM
Codec ID                         : 2
Codec ID/Hint                    : Microsoft
Duration                         : 6s 2ms
Bit rate mode                    : Constant
Bit rate                         : 176.4 Kbps
Channel(s)                       : 1 channel
Sampling rate                    : 44.1 KHz
Bit depth                        : 4 bits
Stream size                      : 130 KiB (2%)
Interleave, duration             : 46 ms (1.38 video frame)

[jagabo]

It looks like the GPS data is in the GR02 chunk. See post #29 in this thread:

https://translate.google.com/translate?hl=en&sl=ja&u=http://kohada.2ch.net/test/read.c...6/&prev=search

From VirtualDub's hex editor and RIFF chunk viewer:

[epsi1on]

It looks like the GPS data is in the GR02 chunk. See post #29 in this thread:

https://translate.google.com/translate?hl=en&sl=ja&u=http://kohada.2ch.net/test/read.c...6/&prev=search

From VirtualDub's hex editor and RIFF chunk viewer:


[Attachment 33208 - Click to enlarge]

Thanks for information, that was very helpfull. I did extracted data i was wanted...
Thank you
--
for further info:
http://gis.stackexchange.com/questions/157114/how-to-extract-gps-information-from-garm...20-video-files