Thank You for Your anwere!
Mean while I found the timeout I was looking for. The GieEVision camera I´m using has an internal Heartbeat Timeout TLDeviceNodeMap[“Cust::HeartbeatTimeout”] which stops the communication when no data is sent for a while. It´s standard value is 3000. I found it here:
https://forum.commonvisionblox.com/t/gvcp-heartbeat-disable/1103?u=parse32
I don´t know if i can deactivate it, but at least i can set it to value 65535 so I have to restart the streams only once a minute to keep it alive.
The number of cameras or the amount of images didn´t affect this issue. But the acquisition part affected the performance and led to less saved images with strong flaws when I receve. So I think about rewriting the code so that I use Events to process the images. I Hope this might boost the performance.
Regrats,
Parse32