Help with fps yoyoing

S

stopsign

n3wb
Mar 11, 2015
13
0
Hi, can anyone tell me what is causing the fps to yoyo on both my cameras, They will not stop bottoming out for a few seconds then climb back up to around 9.5 fps.

I am using 2 AP009 cameras, gigabite network adaptor, windows 7 os.

I have them both running on wifi, and I cannot connect anything else on wifi while the cameras are working.

stopsign
 
Last edited by a moderator:
Bad wifi signal/connection might cause this, try lowering camera bitrate and see if that helps. Lowering bitrate will lower the quality, but also the bandwidth required, so if it makes the fps stay at a steady 9.5 (or to what it is set) it's probably signal/connection problems caused by the wifi.

If lowering bitrate doesn't help, try dropping other cam off the wifi and see if the other one is now steady 9.5fps without yoyoing.
 
Hi mkkoskin, I have lowered my frame rate on both cameras to 10 fps but still doing the yoyo bit, attached is what is happening, down for a couple of seconds then down after a couple of seconds.

attachment.php
attachment.php
 

Attachments

  • Frame rate set at 10 fps bottom.jpg
    Frame rate set at 10 fps bottom.jpg
    60.4 KB · Views: 39
  • frame set at 10 fps top fig.jpg
    frame set at 10 fps top fig.jpg
    62.1 KB · Views: 38
It seems that the bitrate goes down with fps, but thats logical. Could you disconnect one of the cameras completely to check if one camera can stay at 10fps then?
If for some reason your wifi can't handle more than 1MB/s for longer time, this could explain the yoyoing.
 
  • Like
Reactions: stopsign
Hi mkkoskin, I diabled one of my cameras but no the yoyo did not stop, I have checked my wifi on my router and it says data rate of 130mbps whatever that means, I have deleted both cameras and re-installed them but that has altered nothing.
 
stopsign said:
Hi mkkoskin, I diabled one of my cameras but no the yoyo did not stop, I have checked my wifi on my router and it says data rate of 130mbps whatever that means, I have deleted both cameras and re-installed them but that has altered nothing.
Click to expand...
Its the wifi..wifi is problematic particularly with these low end cameras like sricam...the specs indicate that the camera uses mjpeg compression which is a bandwidth hog compared to h.264...
 
  • Like
Reactions: stopsign
That is a massive data rate for even WiFi - 802.11n, which in its original form can reach a theoretical 150Mbps, but in more advanced forms could double up on the single channel limit.
Presumably there is something other than the cameras consuming almost all the bandwidth.

What WiFi standard is your access point using?
 
  • Like
Reactions: stopsign
Hi alastairstevenson,

I don't know to be honest with you, The only thing that happened yesterday was I bought a new mobile phone, and when I went on wifi my signal just started to diminish to next to nothing, I have nothing else running at all that needs wifi.
 
Simply put, your WiFi network is not up to the task. Maybe your router isn't very good. Maybe your house construction materials are not friendly to WiFi.

Or maybe there is too much interference. A simple (but probably ineffective) thing you could try is to change the radio channel in your router settings. If you do this, only choose from channels 1, 6, or 11 and do not let the router automatically choose a channel. The way modern WiFi works, the radio will use multiple channels to increase connection speed. It just so happens that there are 3 channels that do not overlap with each other -- 1, 6, and 11. It is irresponsible to choose for example channel 3 because that would be like double-parking. Blocking 2 of the 3 available spots for no reason.

You might try a wifi analyzer app on your phone to see if you can identify the channels being used in your area by yourself or your neighbors. https://play.google.com/store/apps/details?id=com.farproc.wifi.analyzer&hl=en

An app like this won't find other noise sources though, like microwaves or analog 2.4ghz radio sources. It will only find WiFi networks.
 
  • Like
Reactions: stopsign
Hi all, Thanks for your help on this matter, this problem only happened yesterday after I used my wifi on the new phone I bought.
 
Simply put, your WiFi network is not up to the task.
Click to expand...
You will be right. WiFi and HD cameras don't mix well.

I was assuming, maybe incorrectly, that
I have checked my wifi on my router and it says data rate of 130mbps whatever that means
Click to expand...
referred to the level of traffic that was flowing, as opposed to the connection speed of each device using the WiFi, in which case it looked like something else was consuming loads of traffic, as the cameras are consuming around 10Mbps each.
 
Routers and wireless devices often report some high link speed like 130 Mbps and then dip down to something more realistic like 12 Mbps (if you're unlucky!) once there is enough load that all the signal problems become apparent.
 
Good morning helpers, It would appear that my wifi signal from my router maybe faulty the blue light that signifies the wifi signal goes off and that is why my camera/s are yoyoing, so I am waiting now to have a word with BT.

Thanks guys.
 
Hi all helpers,

I got in touch with BT and I had to do a factory reset which I did, While I had one camera on things were ok but as soon as I put my second camera on the fps rate started dropping again so I decided to hard wire one and now It is ok, touch wood, I will hard wire the other camera when I get back off holiday, Thank you all for your help, my problems were touched on by all of you.

Many thanks.
 
You must log in or register to reply here.
Top Bottom