Hello,
The system works perfectly but it takes 5 min per subject for the static pose and the trial recording. I would like to record 20 subjects during squat and then do the processing after.
I was wondering if it's possible to record static pose and videos from different ipads, synchronize them externally and use opencap to compute the kinematics by using the code providing on Github ?
Thanks,
Pauline Gerus
Processing offline
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Antoine Falisse
- Posts: 439
- Joined: Wed Jan 07, 2015 2:21 am
Re: Processing offline
Hello, you currently need to record videos through the web application for the system to work. Each device model has different camera parameters that are loaded when using the system. These parameters are dependent on the hardware but also for instance on the resolution at which you record videos. If you do not use the web application to record videos, the parameters might not be the right ones and you will have bad results. We are planning to release utilities in the future that would support uploading your own videos (see item 3 here: https://github.com/stanfordnmbl/opencap-core).
That being said, you do not have to wait for each trial to be completed to start recording again (as soon as the button start recording is active you can go on). Also, you do not need to re calibrate the cameras if you use the same setup for multiple subject. There is a button "New session, same setup" that you can use once you are done with recording for a subject, this will redirect you to the static pose screen and you can start collecting data for the next subject. Time per subject is then just waiting for the static pose to be processed and for the squats recordings to be uploaded. Depending on how many people are using OpenCap at the same time, the static pose time might be shorter or a bit longer if all servers are busy.
Hope it helps,
Antoine
That being said, you do not have to wait for each trial to be completed to start recording again (as soon as the button start recording is active you can go on). Also, you do not need to re calibrate the cameras if you use the same setup for multiple subject. There is a button "New session, same setup" that you can use once you are done with recording for a subject, this will redirect you to the static pose screen and you can start collecting data for the next subject. Time per subject is then just waiting for the static pose to be processed and for the squats recordings to be uploaded. Depending on how many people are using OpenCap at the same time, the static pose time might be shorter or a bit longer if all servers are busy.
Hope it helps,
Antoine