This is most likely an issue with camera calibration parameters (intrinsics or extrinsics). Make sure the camera model you are using (i.e., the intrinsic/extrinsic parameters in the mathematical camera model) matches what is used in the code base. The distortion parameters are a likely culprit here.

No solution. Iphone 11 is the only phone it has seemed to happen on. We typically just try different phones.

I'm not sure what you mean by load-bearing calf gaiters? Can you state it another way? We use functional hip joint center trials to compute the hip center markers as described here: https://pubmed.ncbi.nlm.nih.gov/14757454/ . The individual moves their hip through a star pattern as well as a maximum...

Hello, I'm not exactly sure what you mean by patches, but if you mean tracking marker clusters, we use between 3 and 5 tracking markers on semi-rigid plates affixed to the lateral sides of the shanks and thighs. The markers are arranged so there are one or more orthogonal triads per plate. Since we ...

The easiest way would be to write a script to reorganize the validation videos into a file structure similar to what gets created when gait_analysis.py downloads the data. The data within the session folders of the validation is organized quite closely to what gait_analysis expects.

The dynamic simulations don't yet support different MSK models out of the box, unfortunately.

You can capture sagittal and frontal plane by orienting the checkerboard 45 degrees from the frontal plane. both cameras will be able to see it in that case.

We estimate treadmill speed from marker positions at different points in the gait cycle here. https://github.com/stanfordnmbl/opencap-processing/blob/1c13203a3ad7e85b760919bfe5080ac6ca26d53d/ActivityAnalyses/gait_analysis.py#L208 Try dropping a breakpoint in that function to see what is going on. We...

It is available, but the algorithm may fail in some instances. You can run it locally using this script https://github.com/stanfordnmbl/opencap ... nalysis.py

Can you take a screenshot of what values you have in lines 54-75? I suspect something is wrong with how you specify the static trial id.