I use DM8127 (IPNC RDK 3.8) do h264 encode.
The image is 1920x1080,frame rate is 30 fps,bitrates:8000Kbps,CBR mode.
In some time ,the output h264 stream average bitrates is 8500Kbps.
But when I close the aperture and set sensor gain is very high,the output h264 stream average bitrates is more big:60000 Kbps.
The following image is the wrong bitrates image.