Frames not synced

asif

While running this example the "if synced" at line 120 is rarely true and the output is stuck at first or second frame displayed. Also this example is running extremely slow. Whats the reason?

erik

Hi asif ,
Are you using USB or POE OAK? If USB, I suspect it's USB2, as that would explain why you can't stream 12MP (or even 1080P) at 30FPS together with depth. And please provide full MRE report. Another useful docs page: https://docs.luxonis.com/projects/api/en/latest/tutorials/low-latency/
Thanks, Erik

asif

I'm using OAK-D POE Pro on ubuntu 22.

erik

Hi asif , Could you calculate the bandwidth, and check whether that's the culprit? Note that you have actually about 800mbps (on 1gbps link). Useful calculations:

  4K NV12/YUV420 frames: 3840 * 2160 * 1.5 * 30fps * 8bits = 3 gbps
  1080P NV12/YUV420 frames: 1920 * 1080 * 1.5 * 30fps * 8bits = 747 mbps
  720P NV12/YUV420 frames: 1280 * 720 * 1.5 * 30fps * 8bits = 331 mbps

  1080P RGB frames: 1920 * 1080 * 3 * 30fps * 8bits = 1.5 gbps

  800P depth frames: 1280 * 800 * 2 * 30fps * 8bits = 492 mbps
  400P depth frames: 640 * 400 * 2 * 30fps * 8bits = 123 mbps

  800P mono frames: 1280 * 800 * 1 * 30fps * 8bits = 246 mbps
  400P mono frames: 640 * 400 * 1 * 30fps * 8bits = 62 mbps