How to create motion clip file (.npz) from other dataset

[tsbiosky]

Great Work! It is amazing , May I ask what is the data structure of motion clip file. If I have some skeleton coordinates for each frame, how should I create a motion clip file for training ? Thanks

[xbpeng]

if you have the global translation of the root, as well as the rotations for each joint. You can take a look at this example to create a poselib motion file:

ASE/ase/poselib/retarget_motion.py

Line 253 in de18a56

new_sk_state = SkeletonState.from_rotation_and_root_translation(target_motion.skeleton_tree, local_rotation, root_translation, is_local=True)

You will first need to create a skeletonstate by passing the skeleton_tree of your character, the local rotations of the joints, and the root translation to SkeletonState.from_rotation_and_root_translation. Then you can create a skeletonmotion using SkeletonMotion.from_skeleton_state.

[tsbiosky]

if you have the global translation of the root, as well as the rotations for each joint. You can take a look at this example to create a poselib motion file:

ASE/ase/poselib/retarget_motion.py

Line 253 in de18a56

new_sk_state = SkeletonState.from_rotation_and_root_translation(target_motion.skeleton_tree, local_rotation, root_translation, is_local=True)

You will first need to create a skeletonstate by passing the skeleton_tree of your character, the local rotations of the joints, and the root translation to SkeletonState.from_rotation_and_root_translation. Then you can create a skeletonmotion using SkeletonMotion.from_skeleton_state.

Thank you for your reply!
I import skeleton tree from MJCF file but I notice the joint have only 3 axis and at each frame in my motion file the joints only have a rotation value along one axis , but why the local_rotaion need 4 dimensions and how should I get the root_translation for each frame?
In your code "from MJCF" , I saw the local_translation was read from "pos " of joint when creating skeleton tree from MJCF file . Is the root_translation means pos of root joint at each frame ? Here is a example of my motion data , Thanks

[Murrol]

The 4 dimensions rotation is in quaternion. It's that your rotation is in euler angle. Root translation is the global root position.