EasyMocap Empty 3dkeypoints for multiple people

While working with EasyMocap to capture multiple people at the same time my output was producing empty JSON files for the 3dkeypoints. After experimentation, I have discovered 2 reasons this can occur. The first is cameras being too sparse, which is different from single-person mocap where the cameras don't need to be close together. The second is that multiple people mocap requires perfect synchronization, which also differs from a single-person mocap. I did notice that with example footage when I recreated the problems the sample footage had some data being produced while mine had none. This may be due to the different cameras I am using as the sample footage uses the same types of cameras.