Let fall speed when starting to save the AVI with camera basler GigE

Hi all

I use 2 cameras GigE of Ace basler at 60 frames per second to capture of animal locomotion. I randomly experience this kind of problem. When I start to save in a start/stop button and save videos in the HDD sometimes lower at 20-14 fps frame rate and a framework to skip 2 or 3. After that, the pace has become stable at 60 frames per second.

Here are the parameters and specifications of the overall program:

-J' use a loop of producer/consumer (I've ever known a fill of the queue even when the rate of drop occur)

-J' fixed bandwidth of the card Intel GigE from 100 to 500 for each camera

-sent packet size = 8000

-firewall disabled

-execution of vi in higher mode

I observed that the dropping of the pace occur when the vi run for a while without interaction with the operator (the operator configure other settings in another computer, so the vi only acquire the video without saving)

I have attached the vi

Thank you for your help

Alex

Hi Eric and Isaac

Finally, the problem was similar to that indicated by Peter Westwood in his post 'lost GigE frames/buffers '. I discovered that the problem occur with the version of labview 2012. Indeed, I tried with the 2011 version and I have it all fall. So, I'm doing the same thing that Peter is "I changed the program, so that keeps an account number of buffer (incrementing the number of buffer on each bucket) and specifies the number of buffer to the VI Grab." "It works well, even on the occasions when the loop of the acquisition is sometimes momentarily delayed for up to a second or more, i suspect, Windows to write the contents of the disk the disk buffer, or do some other household.

So even if the fps drop the program acquire the right frame and in the video I do not see any image ignored

Best regards

Alex

Tags: NI Hardware

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