VIOFO A119 video quality (bottom corners too dark).

[Bob Black]

Might want to check your time and date setting

Looked at it like twice before and never realised it was ahead. Should've gone to Specsavers .

 

[jqnguyen]

Does anyone know how we access the GPS features? I bought the GPS unit, but I don't know what to do so I can actually see the benefits of paying $10 for that unit. Am I suppose to download a software or something?

 

[Curtis54]

gps infos are embedded in the video file, we can extract the informations with a python script :

http://sergei.nz/files/nvtk_mp42gpx.py

https://dashcamtalk.com/forum/threads/script-to-extract-gps-data-from-novatek-mp4.20808/

this script will work with python2, but with python3 you need to change line 172 to :

with open (out_file, "w") as f:

instead of :
with open (out_file, "wb") as f:

just delete the "b" letter in this line,

but the script will produce no gpx data if we use python3, with python2 no problems

I think it's possible to create a 100% open source software with GUI, video player which uses the same method for extracting gps data from the video file,
currently the only software avalaible is a non-free software ( Dashcam Viewer ), with bugs and limitations, I hope this situation will change, we need an open source software,

a multi plateform software could use java, with xuggler as a java wrapper of ffmpeg, and a google java plugin for displaying a map with gps data, all tools for programming are already available, all we need is a developper who has time for this

 

[SergeiF]

gps infos are embedded in the video file, we can extract the informations with a python script :

http://sergei.nz/files/nvtk_mp42gpx.py

https://dashcamtalk.com/forum/threads/script-to-extract-gps-data-from-novatek-mp4.20808/

this script will work with python2, but with python3 you need to change line 172 to :

with open (out_file, "w") as f:

instead of :
with open (out_file, "wb") as f:

just delete the "b" letter in this line,

but the script will produce no gpx data if we use python3, with python2 no problems

I think it's possible to create a 100% open source software with GUI, video player which uses the same method for extracting gps data from the video file,
currently the only software avalaible is a non-free software ( Dashcam Viewer ), with bugs and limitations, I hope this situation will change, we need an open source software,

a multi plateform software could use java, with xuggler as a java wrapper of ffmpeg, and a google java plugin for displaying a map with gps data, all tools for programming are already available, all we need is a developper who has time for this

I will test it with python3 see if there are any other issues...

 

[Curtis54]

if I use python3 I get a gpx file but there is no gps info ( coordinates, speed ),

I think the problem is located on lines 138~168, something has probably changed in python3 related to binary reading file

 

[Dmitry Dubinsky]

only because I dabble in photography a bit. this effect is called vignetting. it happens in all types of lenses but the effect is most noticeable in wide angle lenses.

here's a good explanation.

I suspect the cause is polarization of the windshield and/or lens itself. One way to test is to compare video taken outside of the car and then same inside. I will test soon