several kinds of gige error: unable to set packet size, blocks being dropped, getdata timed out and framesize changed

Setup: a GigE camera, a gigabit ethernet card, Matlab R2013a, Windows 7 Ultimate

Matlab function used: vid = videoinput('gige',1); start(vid); getdata(vid); stop(vid);

Problem statement: above combination used to work fine for quite a long time(about two years). But suddenly several kinds of error occured during the acquisition of images. Below are frequently occured errors:

1) unable to set packet size:

2) blocks/frame being dropped:

3) getdata timed out:

4) frame size changed

I tried to set src.PacketDelay and src.PacketSize according to answer provided in https://cn.mathworks.com/matlabcentral/answers/91834-how-do-i-calculate-the-packet-delay-for-a-gige-vision-camera-to-prevent-dropped-frames but it doesn't work.

So what might go wrong and I'm really appreciated if anyone can help me solve this problem.

More information:

1) ethernet card: the maximum size of jumbo frame is 7KB MTU, the maximum value of receive buffers is 512, and the Link Speed & Duplex has already been set to Auto Negotiation;

2) one acquisition will typically last for 10 minutes, which results in 12000 frames with frame rate set to 20 fps. I have already allocted memory before data acquisition.

Answer 1

[qiang zhong]

(1)Add an code each time you open the vid object：imaqreset

(2)Set the value of packDelay