Lower bitrate without affecting FPS

[Mad Martian]

I would like to lower the bitrate that Blue Iris records at without altering the FPS. I am aware this will reduce the quality of the video. However the "Max Rate" setting in Blue Iris appears to affect both the bitrate AND the FPS. How do I lower the bitrate while keeping the FPS at 30? I am using Hikvision DS-2CD2032-I cameras. The default bitrates are pretty taxing on my CPU and I already have hardware acceleration turned on (H.264 setting) with Windows 10, running BI as a service.

 

[Camit]

I would like to lower the bitrate that Blue Iris records at without altering the FPS. I am aware this will reduce the quality of the video. However the "Max Rate" setting in Blue Iris appears to affect both the bitrate AND the FPS. How do I lower the bitrate while keeping the FPS at 30? I am using Hikvision DS-2CD2032-I cameras. The default bitrates are pretty taxing on my CPU and I already have hardware acceleration turned on (H.264 setting) with Windows 10, running BI as a service.

Higher fps uses more CPU not bitrate so much ... lower fps lower CPU ,no reason to run at 30 fps
Find the ip adderss of the camera and log into it there will be settings

 

[fenderman]

I would like to lower the bitrate that Blue Iris records at without altering the FPS. I am aware this will reduce the quality of the video. However the "Max Rate" setting in Blue Iris appears to affect both the bitrate AND the FPS. How do I lower the bitrate while keeping the FPS at 30? I am using Hikvision DS-2CD2032-I cameras. The default bitrates are pretty taxing on my CPU and I already have hardware acceleration turned on (H.264 setting) with Windows 10, running BI as a service.

Are you recording direct to disk?
Are you using the demo or licensed?
As mentioned you set the fps and bitrate in the camera itself...no need for 30fps, that is a waste.

 

[Mad Martian]

all cameras set to direct to disk with Blue Iris DVR format and FLAC audio checked
licensed
text and graphics overlay disabled for all cameras (time/date generated by the cameras)

I tried cutting the "max bitrate" in the Hikvision camera configuration in half, then rebooting the camera and then the BI server, but this had no affect on the setting in BI. How do I get BI to automatically re-adjust? Or is the "max rate" setting in BI not really relevant if I am adjusting it on the camera side?

 

[fenderman]

all cameras set to direct to disk with Blue Iris DVR format and FLAC audio checked
licensed
text and graphics overlay disabled for all cameras (time/date generated by the cameras)

I tried cutting the "max bitrate" in the Hikvision camera configuration in half, then rebooting the camera and then the BI server, but this had no affect on the setting in BI. How do I get BI to automatically re-adjust? Or is the "max rate" setting in BI not really relevant if I am adjusting it on the camera side?

You dont set anything in BI...it auto adjust to something higher than whatever it is receiving, its that way by design.
What processor are you using? How many cams and what resolution?
Are you logging in remotely?

 

[Mad Martian]

No remote logging - only direct to disk
System is a Gigabyte Brix model GB-BXi5H-4200 with Core I5-4200U
C drive for apps: Crucial M500 120GB mSATA Internal Solid State Drive CT120M500SSD3
D drive for video storage: HGST Travelstar 7K1000 2.5-Inch 1TB 7200 RPM SATA III 32MB Cache
RAM is Kingston HyperX Impact Black 8GB Kit (2x4GB) 1600MHz DDR3L CL9 SODIMM 1.35V (HX316LS9IBK2/8)

Cameras:
2 x Hikvision DS-2CD2032-I 1080p
1 x Samsung SmartCam HD Pro 1080p
1 x Dlink DCS-2332L 720p

 

[fenderman]

No remote logging - only direct to disk
System is a Gigabyte Brix model GB-BXi5H-4200 with Core I5-4200U
C drive for apps: Crucial M500 120GB mSATA Internal Solid State Drive CT120M500SSD3
D drive for video storage: HGST Travelstar 7K1000 2.5-Inch 1TB 7200 RPM SATA III 32MB Cache
RAM is Kingston HyperX Impact Black 8GB Kit (2x4GB) 1600MHz DDR3L CL9 SODIMM 1.35V (HX316LS9IBK2/8)

Cameras:
2 x Hikvision DS-2CD2032-I 1080p
1 x Samsung SmartCam HD Pro 1080p
1 x Dlink DCS-2332L 720p

Your cpu is very weak, that is the reason you are having these issues...what cpu usage are you seeing?

 

[Mad Martian]

Your cpu is very weak, that is the reason you are having these issues...what cpu usage are you seeing?

This is why I want to lower the video bitrate.

 

[fenderman]

This is why I want to lower the video bitrate.

Lower the frame rate not only the bitrate all this is done in the camera you will be able to see the difference if you look at Blue Iris status

 

[nayr]

15FPS is more than enough; Dont be daft and think that FPS has anything to do with image clarity/blur.. Thats shutter speed and its largely independent of FPS, unless your broadcasting your cameras on the internet for sporting events you have absolutely no justification to run at >15FPS, foot traffic is not nearly fast enough to even notice a difference.. your not making a SciFi movie here; your wasting valuable resources to save useless data.