[ozorion]

Looking through the docs that Almaretto posted, it appears that the front facing camera uses an IP connection whereas the rear camera is a line-level analogue connection.

Based on the resolution specifications of the front camera, my guess would be that it's an analogue image device with a built-in encoder to turn that in to an IP signal. The issue you'll have is that even though there are a couple of open source IP streaming protocols (ONVIF being the most common), it's more likely that the IP streaming protocol is something proprietary to BMW or at least to the OEM hardware that they use.

What are you hoping to set up with the cameras?