there's no 3rd party tools available to be able to do this, I'm a firm believer in 'if man can make it, man can break it' however there's nothing that has been written for the task to date, we work with this platform and there's not even anything available to us for this from Novatek, so while I'll agree that it may be possible to achieve, currently though the answer is not possible right now, the bootloader is the stumbling block from what I understand from those that have tried extracting a firmware that is actually usable