Pytorch crashes with linking error on libavcodec.so.58

[Dr. Robert Marmorstein]

After installing python3-torch, I ran python3 and ran "import torch". Instead of working, it gives this error:

Python 3.11.6 (main, Oct 8 2023, 05:06:43) [GCC 13.2.0] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import torch
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/lib/python3/dist-packages/torch/__init__.py", line 229, in <module>
    from torch._C import * # noqa: F403
    ^^^^^^^^^^^^^^^^^^^^^^
ImportError: libavcodec.so.58: cannot open shared object file: No such file or directory
>>>