Yeah if you bin 4 pixels from a 4K sensor into 1 pixel in 1080p footage then sure that will work too, but then you only get 1080p footage at night, and not that there is anything wrong with that.
Also i am not sure if current chipsets actually support pixel binning, Im not that nerdy about all this.
I dont think A12 do or the current novatek chipsets, but the H2 of the new YI might,,,,,, i do think its a cool way of upping the low light performance of a high pixel ( 4k or more ) sensor, at the expense of resolution off course.
I would love sweet 4K/ 30 or 60 FPS footage for daytime and nice 1080/ 30 or 60 FPS footage for night time in a dashcam, and i do think its out there and on the way, but just not in the hardware people are building with now, but it night be on the long term plans of some brands.
I have just recorded some 1080/120 footage with the Sj7 Star, thats giving ample room to detect those license plates
but this is off course slow town traffic on a less fortunate day though there is a little sort of sunshine in the footage.
I just have to cut out 1 minute of that slow it down to 25% and then upload it, but first i have to stuff my face with something.
Above is off course my personal feelings on using action cameras as dashcams, i would prefer to have around 4 hours of footage, but this is due to me exposing people on youtube, and if my out drive get recycled by my drive home then all i captured then i wanted to share is gone.
But i can make do with that, rarely do any longer drives, plus if i was to start using the manual event button to save events then that would make saving things on longer drives easy-