WouterOddBot
I do - Encoder, detection and features will change the amount of messages or their size when movement is introduced.

Encoder will lower information transfer when images are static because the information in an image stays the same. When moving, the entropy increases so more info is required.

Detector will produce more detections when objects are in the scene. This potentially increases the processing required for following nodes since they have to process each detections separately.

Same goes for features.

Thanks,
Jaka

    Ok so I increased numframespool for the left and right camera nodes and the depth node from 3 (default value) to 5, but it didn't make a difference.

    What information do we need to see what breaks the pipeline? And how can I retrieve that information from the camera?

    Apart from that, I don't remember seeing this until perhaps few months. And afaik we didn't make significant code changes to the affected part of the pipeline*. Could it be due to a depthai update? Since it only happens after 4h it feels a bit like a memory leak or something? At least I can check if we forgot to update any firmware.

    *We did make a significant change in the detection part of the pipeline. We used to have the color camera node run at 5fps and the left/right camera nodes at 10fps. But then the color and depth frames aren't closely synced. So now we have the color and left/right nodes run at 10fps but we downsample the color frames to 5fps (we drop every 2nd frame). Could that still make a difference?

      WouterOddBot

      WouterOddBot What information do we need to see what breaks the pipeline? And how can I retrieve that information from the camera?

      It's not currently reported unless you are looking at a crash dump which might give some additional info, but it's difficult to find the cause. We are working on making this logging better.

      WouterOddBot Could it be due to a depthai update? Since it only happens after 4h it feels a bit like a memory leak or something? At least I can check if we forgot to update any firmware.

      It does sound like a memory leak as well, perhaps you can try some older FW where all needed features are still present. Though I would say the change you have made could affect this as well. We have seen such crashes previously as well, but many turned out to be intel's fault (MyriadX memory issues).. Hope that is not the case here.

      Thanks,
      Jaka

            Ok so I made something that we can retrieve crash dumps.

            I suggested it may be a memory leak, but the logs don't show any changes or out of memory (see images attached). Perhaps it still something else?

            Tried retrieving a crash dump, but the camera doesn't make a crash dump when it stops working.

            4 days later

            @jakaskerl We suspect that this could relate to how fast the camera moves. Which makes sense according to your entropy story. But we'd still like to get a clue for a solution? Thanks in advance.

              WouterOddBot
              If that is the case and videoEncoder is the problem then you should check the bandwidth that is consumed by the pipeline.. How about you lower the quality to a minimum. That way, even when moving the difference in bitstream size should be negligible - or perhaps use setBitrate() to lock the size.

              Thanks,
              Jaka

                  5 days later

                  Hi @jakaskerl Can we perhaps schedule a meeting about this? We've been trying to fix this for a few weeks now, but we can't see what's going on. And our robots are relying on your cameras.

                  I have a similar problems. I run a pipeline of three cameras (rgb, two monos), 10fps, 720p, sent to jpeg encoder, and the pipeline will crash in less than 20 minutes. It crashes when there are some movements in the scene. I got crash dumps most of times and sent one to the forum already. but no much of concrete response from Luxonisc. Basically all of the dumps mentioned the words: "thread, memory pointer, synchronization". I downed the pipeline to 6fps, same thing happened.

                  I never expect things like these would happen.
                  Please HELP. Luxonis.

                  @jkchen46033 could you perhaps send over the crash dumps you are mentioning? We'd like to repro this locally so we can debug it.

                    @WouterOddBot could you pehraps provide minimal repro example, so we can try to repro it locally? feel free to send it over to erik@luxonis.com and ill set it up locally & connect debugger to the camera. Please also mention depthai version, camera used, host computer/os used (perhaps relevant), cable/powering specifics, etc. just so we can have as close to 1:1 repro as possible.
                    Thanks, Erik

                      Hi jakaskerl
                      We can lower the quality of the hi res images but the camera sends only very few of them. Most of them are dismissed. So they should not take too much bandwidth?

                        erik Here is the dump. Let me know if you need additional info. Thanks a lot for your help.

                        My pipeline setup this way: poe, 3 lens, 3 jpeg encoder, all 10fps, two monos 720p, rgb 1080p, jpeg to script node, pumping out urls: /mjpeg, /left, /right, all in mjpeg multipart frames.

                        This dump is produced today.

                        {"crashReports":[{"crashedThreadId":167837697,"errorSource":"RTEMS_FATAL_SOURCE_EXCEPTION","errorSourceInfo":{"assertContext":{"fileName":"","functionName":"","line":0},"errorId":0,"trapContext":{"trapAddress":2204218472,"trapName":"Bad trap","trapNumber":9}},"processor":0,"threadCallstack":[{"callStack":[{"callSite":2200385356,"calledTarget":2200381832,"context":"","framePointer":2211279768},{"callSite":2205098404,"calledTarget":0,"context":"Thread handler","framePointer":2211279864},{"callSite":1881154788,"calledTarget":0,"context":"Thread handler","framePointer":2211279960},{"callSite":2205098556,"calledTarget":1881154720,"context":"","framePointer":2211280080},{"callSite":2204985004,"calledTarget":2205098536,"context":"","framePointer":2211280184},{"callSite":2205931196,"calledTarget":0,"context":"Thread handler","framePointer":2211280288},{"callSite":2204298320,"calledTarget":0,"context":"Thread handler","framePointer":2213073296},{"callSite":2204221036,"calledTarget":2204218436,"context":"","framePointer":2213073592},{"callSite":2204208956,"calledTarget":0,"context":"Thread handler","framePointer":2213073864},{"callSite":2204201828,"calledTarget":0,"context":"Thread handler","framePointer":2213074032},{"callSite":2204165556,"calledTarget":0,"context":"Thread handler","framePointer":2213074272},{"callSite":2204064028,"calledTarget":0,"context":"Thread handler","framePointer":2213074392},{"callSite":2204052024,"calledTarget":2204064100,"context":"","framePointer":2213074488},{"callSite":2204054424,"calledTarget":2204051528,"context":"","framePointer":2213074584},{"callSite":2204064028,"calledTarget":0,"context":"Thread handler","framePointer":2213074680},{"callSite":2204050908,"calledTarget":2204064100,"context":"","framePointer":2213074776},{"callSite":2200546904,"calledTarget":0,"context":"Thread 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                        "crash_dump.json" [Incomplete last line] 1 line, 94228 bytes

                        • erik replied to this.

                            jkchen46033 could you please upload the json to gdrive and send the link? as your reply is incomplete

                                Hi erik

                                In the original post I already included our camera pipeline. Can you use that as an MRE?

                                Our robots run on Ubuntu 22.04 with Ros2 Humble or Ubuntu 24.04 with Ros2 Jazzy. We use mostly Oak-D Pro USB cameras (https://shop.luxonis.com/products/oak-d-pro?variant=42455252369631), but still have some older Oak-D PoE cameras. Our depthai version is 2.27.0.0. The cameras are connected with provided USB3 cables. We also tested with the Oak-D Y adapter to make sure it's not a power problem.

                                We have been looking at the telemetrics of our robots. Our robots drive back and forth across a field. At the end of the field a robot stops, makes a u-turn, then starts driving back again. It seems that the cameras fail most of the times when a robot makes a u-turn or when it starts driving back again. So it might have to do with acceleration. For instance that the feature detector can't handle too much acceleration? But it only happens after some hours.

                                I hope that helps. Please let me know if you need more info. We're building 16 robots with each 3 or 4 cameras, so we would be very grateful if these issues are fixed.

                                Kind regards

                                  Hi @WouterOddBot ,
                                  My guess would be that happens due to USB3 cable, perhaps you could try using USB-C with screws? I tried running your script (from the OP), but it's not really reproducible, tons of things aren't specified (create_downsample_script, parameters, model, json...), could you make it fully reproducible (.zip that contains everything)? And please check whether it also crashes if the camera is completely still (no movement in USB cable).
                                  Thanks, Erik

                                    @jkchen46033 I requested the access to your gdrive. Could you also share full minimal repro example, so we can test it locally?