File "/home/jsj_21_07/anaconda3/envs/vibe-env/lib/python3.7/subprocess.py", line 339, in call

    with Popen(*popenargs, **kwargs) as p:

  File "/home/jsj_21_07/anaconda3/envs/vibe-env/lib/python3.7/subprocess.py", line 800, in __init__

    restore_signals, start_new_session)

  File "/home/jsj_21_07/anaconda3/envs/vibe-env/lib/python3.7/subprocess.py", line 1551, in _execute_child

    raise child_exception_type(errno_num, err_msg, err_filename)

FileNotFoundError: [Errno 2] No such file or directory: 'ffmpeg': 'ffmpeg'

解决方法：

well I solved it (I think) following this (https://stackoverflow.com/questions/40509002/ffmpeg-is-not-being-detected-by-spyder): "You need to install a copy of ffmpeg that can be recognized by Anaconda. Please run this command in a terminal to do that":
conda install -c conda-forge ffmpeg