I just turned on my new A129 Pro Duo and the firmware it came with and build is this: If I download the beta noted above, this would be newer that the one installed?
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Yes - BUT, it may have problems.
Some example might be,
WiFi no longer works
Picture quality may degrade
Etc
If you understand what beta software is and understand basic file handling then you should be fine.
You don't need to install it if your are happy with how your dash cam is going.
If this is the first Viofo dash cam you have used you might want to wait until others try it.
I would try it but I don't have that model
Get familiar with your new toy play with all the settings.
Some things to play with for day and night
Configure EV + and -
Set up parking mode
Try different setting for parking
Play with the resolution and the fps and see if you can see number plates easier at 60fps
Even try different brands of tf cards
A good experiment is get an old 16GB SanDisk and see what errors you might get.
Format it in NTFS or FAT12 and see what happens. Btw nothing I suggested will break the Viofo dash cam.
You can spend endless hours fiddling and that's before trying out beta firmware, I know I have
Cheers.