Error occurs when running infer.py （2）

[Celina-521]

When I run infer.py the error occurs as following:
Traceback (most recent call last):
File "tools/infer.py", line 128, in
litmodel.generate_one_sample(text, name+"_"+str(i))
File "tools/infer.py", line 66, in generate_one_sample
self.plot_t2m([motion_output[0], motion_output[1]],
File "tools/infer.py", line 50, in plot_t2m
plot_3d_motion(result_path, paramUtil.t2m_kinematic_chain, mp_joint, title=caption, fps=30)
File "/data1/fyy/InterGen/tools/../utils/plot_script.py", line 130, in plot_3d_motion
ani.save(save_path, fps=fps)
File "/data1/fyy/anaconda3/envs/intergen/lib/python3.8/site-packages/matplotlib/animation.py", line 1102, in save
alt_writer = next(writers, None)
TypeError: 'MovieWriterRegistry' object is not an iterator

[zycliao]

I fixed that by installing ffmpeg as suggested by this thread