It might be a thermal issue!
The following is my last reply to a mailing list thread on that issue (from late September 2024)
With the help of the DepthAI debug output, I found that regularly shortly after the reported chip temperatures got up to 77C, the pipeline would 'shut down' and the host would not see any data any longer.
So, I strapped a 50mm fan to the Oak-D and it was running fine for an hour;-) The reported chip temps stayed around 62C.
Next step was to replace the mount and integrate two 30mm fans. Now the temps stay around 55C and the pipeline is still going strong after 1.5h 😉
Attache are two pictures of the mount, one with the rigged up 50mm fan and the current version with the two 30mm fans;-)
[coneslayer_node-2] [19443010E13A7A2700] [1.1] [4915.611] [system] [info] Temperatures - Average: 54.48C, CSS: 55.51C, MSS 54.42C, UPA: 55.07C, DSS: 52.90C
[coneslayer_node-2] [19443010E13A7A2700] [1.1] [4915.611] [system] [info] Cpu Usage - LeonOS 60.79%, LeonRT: 50.47%
[coneslayer_node-2] [19443010E13A7A2700] [1.1] [4916.613] [system] [info] Memory Usage - DDR: 66.99 / 333.28 MiB, CMX: 2.47 / 2.50 MiB, LeonOS Heap: 47.34 / 81.76 MiB, LeonRT Heap: 5.70 / 39.90 MiB / NOC ddr: 3297 MB/s
Maybe that's helpful to some;-

