You say you "understand it relates to light exposure", but then you ask whether FPS will change and then say, "the bitrate remains an issue with moving objects." It doesn't sound like you really do understand the difference so let me try again.
Thanks for your reply and explanation, but I understood correctly I think
. My question regarding FPS comes indeed from shutter speed in photography, where longer exposure time gives a brighter and sharper image. However I did not count for motion which also continues during the longer exposure times (as you point out), and could even result in more blur.
What I mean when relating bitrate to motion picture quality is best explained by quoting from the first post of this thread:
It might sound strange, but the codec efficiency seems to be worse in comparison to 5831. In shadowed areas and on moving objects, blocky artifacts appear. Luckily Dahua has raised the top bitrate in 1831 to over 15mbit/s. At 25fps this is an equivalent for 9mbit/s @ 15fps in 5831. Before firmware update I had an option to set over 50mbit/s in custom mode. However at 30mbit/s I had lot of dropped frames even in live view. Over 40mbit/s there was no image, only black window. After rising the bitrate to 15000kbps the blocky shadows are much reduced but still present. Even 30mbit/s do not resolve the problem, while 5831R-ZE is almost free of such artifacts at 9mbit/s. See the below example.
This means picture quality of moving objects could improve if a higher bitrate is used. However I understand now that this is different from the ghosting which happens in low light conditions. I will barely make any diffence in that sense I see now.
Still, my request to be able to set higher bitrates for a camera which is able to deliver these is valid. It will make difference espacially in detailed images during day. I hope Dahua will make this possible again!