It looks like what you encountered was a flashlight from a speed/red-light cam. Those cams are equipped with flashlights in order to capture vehicle’s license plates under low light condition. During “old” days, they used “regular” camera flashlights. Due to safety concerns of driver distraction, the current version of flashlight uses infrared which is invisible to human eyes. In general, digital cameras could “see” infrared unless an internal infrared filter is present.I've got saved footage going back to when I got the V3 so I can compare various conditions through various firmware.
It only came to light because there is a strange new, what we think is a speed camera, on the M4 but is nothing like anyone has seen before. Not Specs and not Hadecs. It's front facing and has flashed me twice even though I was under the limit.
I didn't notice it flashing when I was driving so I'm wondering if it one of those strange effects you get triggered by the dashcam LED that I have activated.
The freeze frame isn't as sharp as I'd expected so time to investigate:
A more efficient codec requires less bitrate, and less bitrate requires less file size.So the file size reduction isn't just due to a more efficient codec, it's also due to the bit rate being lowered.