Camera Settings FPS and iframe

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mrredpants
Posts: 1
Joined: Wed Mar 24, 2021 5:51 pm

Camera Settings FPS and iframe

Post by mrredpants » Wed Mar 24, 2021 6:00 pm

I want to confirm my understanding of the recommendation for setting the fps and iframe on the cameras themselves.

My interpretation of the literature is that the camera FPS and iFrame should ideally be the same, so 15fps and 15 iframe.

My setup is pretty basic. Here are the cameras as they are now:
1.png
1.png (38.24 KiB) Viewed 282 times
Here is the pool dome (the iframe was all 60, I changed to 30)
2.png
2.png (8.28 KiB) Viewed 282 times
Here is The Front yard driveway
3.png
3.png (43.08 KiB) Viewed 282 times
I realize I'm asking for a blanket statement, but I'm just trying to clarify what the help doc is telling me here.
viewtopic.php?f=11&t=2049

"Rule of thumb: Make sure the key frame (i-frame) interval on your camera equals the FPS for the camera. The only reason you would consider increasing the interval is if network bandwidth is becoming an issue."

Thanks in advance!
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TimG
Posts: 1002
Joined: Tue Jun 18, 2019 10:45 am
Location: Nottinghamshire, UK.

Re: Camera Settings FPS and iframe

Post by TimG » Sat Mar 27, 2021 11:42 am

My interpretation of the literature is that the camera FPS and iFrame should ideally be the same, so 15fps and 15 iframe.
Yes, that should give you 15 frames per second, and 15 key frames per second = 15/15 so Key = 1.

The complication is that the iframe settings may look different between different camera types, which always causes confusion. The simple answer is that you are changing the camera iframe settings until the BI5 Status/Cameras list shows the key between 0.5 and 1. That would make your Pool Dome (Cam1) 120.3 FPS/ 1.0 Key in your Blue iris screen grab.
I realize I'm asking for a blanket statement, but I'm just trying to clarify what the help doc is telling me here.
Blankets R Us !! You tweak all of the cameras to get the BI menu to show a Key of between 0.5 and 1 :D

Note that the help file also states:
Furthermore, keep settings simple such that all the streams have the same FPS. Choosing between 30 fps or 15 fps is a user preference. Setting all streams to have the same fps makes time reconciliation easier for BI. Turns out certain vendors like Hikvision set different fps (10, 15) for different streams. Different fps settings unnecessarily complicate multiple streams for BI.
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