You can use BI to record straight from the IP camera up to the number of streams it will allow.
Or you can have BI connect to the DVR and stream it from there. I have some analog cameras that go to a DVR,
then back out to the BI box, and they work well. You will usually have a higher resolution video on the DVR
then it puts out to the BI. Also, if the CPU in the DVR is not fast enough, you might get higher compression on
the video, or even slow frame rates.