This notebook illustrates the process of opening and analyzing motion capture data stored in C3D file format using the Python c3d library. It demonstrates how to read frames from a C3D file and print the point coordinates for each frame, offering a hands-on example for researchers or developers working with biomechanical motion data.

snippet.python

import c3d

snippet.python

with open('Theodora_Afraid-C3D.c3d', 'rb') as handle:
    reader = c3d.Reader(handle)
    for i, (points, analog) in enumerate(reader.read_frames()):
        print('Frame {}: {}'.format(i, points.round(2)))

//anaconda/envs/general/lib/python3.6/site-packages/c3d.py:564: UserWarning: missing parameter ANALOG:LABELS
  warnings.warn('missing parameter {}'.format(name))
//anaconda/envs/general/lib/python3.6/site-packages/c3d.py:564: UserWarning: missing parameter ANALOG:DESCRIPTIONS
  warnings.warn('missing parameter {}'.format(name))



---------------------------------------------------------------------------

ValueError                                Traceback (most recent call last)

<ipython-input-2-544754b532f4> in <module>()
      1 with open('Theodora_Afraid-C3D.c3d', 'rb') as handle:
      2     reader = c3d.Reader(handle)
----> 3     for i, (points, analog) in enumerate(reader.read_frames()):
      4         print('Frame {}: {}'.format(i, points.round(2)))


ValueError: too many values to unpack (expected 2)

python