Read multiple camera gige Basler on 1 port lan have trouble

[vuka]

I am reading 4 Balser aca 2500 14gm cameras with the parameters as shown below.

I have read the camera but it has some problems when I grab the image. It appeared black lines on the image, like it lost data transmission, I also split the bandwidth of 4 cameras evenly. I don't know if anyone has this situation like me, can help me give some advice to fix it.

Thank all.

[SamiF]

This behaviour means you are losing packets. You can check this by monitoring packet related status information :

When you say you split the bandwidth, how did you proceed ? Because if you just decreased frame rate, that will not be enough  as the peak data rate is not changed.

I would recommend :

• reducing the "Acquisition attributes::DesiredPeakbandwidth" setting as it is the one that controls the bandwidth (check https://knowledge.ni.com/KnowledgeArticleDetails?id=kA00Z000000kKfzSAE&l=fr-FR)
• check your adapter as well as your switch are properly handling jumbo frames
• although there is a low probability in your case, maybe you can check your cables.

Sami

[vuka]

Yes. The way I split the bandwidth is, as you said above, I split the DesiredPeakbandwidth from 1000 to 250 for 4 cameras. Packet size per camera I also set is 1500. My frame rate is currently 5fps. I think it's enough to work but it still suffers from the same problem on my post.
Can you give me another advice on this?
Thank you very much !

[SamiF]

I would strongly suggest you enable jumbo frames to use much bigger packet size (8 or 9k). If your ethernet adapter does not have such a feature, change to another one and also reduce the desiredpeakbandwidth to lower value (150, 200 ?).

Sami