There is no way to hardware sync with OpenCap, as everything is done over internet. We do have an example of using common signals to synchronize a force plate (https://github.com/stanfordnmbl/opencap ... ntegration). Keep in mind, however, the time sync'ing method is specific to the task (jumping in...

OpenCap automatically scales a musculoskeletal model. And yes, when you download the data you get the scaled model as well as the .trc of the neutral trial if you'd like to scale a different model.

It should be fine since we do not use face markers, but you'd need to try it out. Participants in our validation study had masks on, so I'd imagine it would be fine.

Hi Harry,

OpenCap can currently only analyze one person at a time, which would make it not work great in this situation. Many human mesh reconstruction algorithms could give you SMPL body models of many people that you could potentially use.

Scott

Try dropping breakpoints in the main.py function prior to inverse kinematics to see what is happening.

It worked fine for me. Have you pulled the latest version of the code from github?

Hi Sandra, When you open a model in opensim, there is no motion associated with it, so how it appears relative to the floor is determined by the default pelvis_ty. You can change pelvis_ty in the coordinates pane. It depends what you intend to do with this synchronization. If you want to perform inv...

That step is now automated, so you do not need to verify the calibrations anymore. The videos are a bit out of date

Do you mean it took 20 minutes for the videos to upload (i.e., the 'cancel trial' button was on the screen for that long), or it took 20 minutes for the trial to turn from yellow (processing) to green (done)? If you are referring to it taking time to turn from yellow to green, you can continue colle...

With the mocap data, we computed a functional hip joint center using the method described in Piazza 2004. https://pubmed.ncbi.nlm.nih.gov/14757454/

We didn't do functional hip joint centers for the opencap model. All scaling was based on the augmented markers in a standing neutral trial.