Hi rmaxwell
The pipeline graph of the example shows the object tracker node limits the frame flow. This means frames get discarded there.
![](https://discuss.luxonis.com/assets/files/2023-07-04/1688473114-285562-image.png)
After setting the objectTracker.inputDetections.setBlocking(True)
the pipeline is as follows:
![](https://discuss.luxonis.com/assets/files/2023-07-04/1688473350-902338-image.png)
Now no frame gets discarded and the pipeline runs frame by frame as supplied by the xLInkIn.
Hope this clears things up.
Thanks,
Jaka