您好，请教一下关于videopose.py中的一些问题

[SyhFighting]

save 3D joint points

np.save('outputs/test_3d_output.npy', prediction, allow_pickle=True)
rot = np.array([0.14070565, -0.15007018, -0.7552408, 0.62232804], dtype=np.float32)
prediction = camera_to_world(prediction, R=rot, t=0)

请问，这部分代码中，rot这四个参数代表什么呢，如何可以得到它们?

[zh-plus]

1. The definition of rot: check this issue.
2. This rotation value is retrieved from a random object. In the original script from Facebook, there's a comment indicating that: Comments

   # If the ground truth is not available, take the camera extrinsic params from a random subject.
   # They are almost the same, and anyway, we only need this for visualization purposes.
   for subject in dataset.cameras():
   if 'orientation' in dataset.cameras()[subject][args.viz_camera]:
       rot = dataset.cameras()[subject][args.viz_camera]['orientation']
       break
   prediction = camera_to_world(prediction, R=rot, t=0)

[SyhFighting]

thank you！！