@Rodrigo Emedy, Since you have a cams with Sony IMX179s sensor, why do not you try one of the firmwares available on GoPrawn that have the motion detection feature?
I think it would solve your problems of size of the video files and you would not be recording useless video without any kind of action.
@NMD , I searched for this motion detection firmware, but could not find it... Anyway, this would not work for what I need.. i read that it takes a few seconds to begin recording.. and the bad people action, is right when they just pass by my car.. so I really need to record this all the time.. it is really fast what they do. :/
@kizwan , if you're right and #0x1E is framerate, it should be 30... so how to know whats the HEX code for like 15, 10 fps? According to my post above about the yi hack, 30fps would be 0x41f0 .. all its codes had 4 digits after 0... and at the sdv file it had 2 or 3 digits.. have you tested it? I was trying to open in IDA Pro 5 Free, but it came with an ARM error... I installed the IDA 6 Demo and now it opened, but really dont know how to find those numbers..