OTIO targets the VFX Reference Platform https://vfxplatform.com/ 2016-2020, which should cover PySide 2.0.x and 5.12.x.

It looks like our setup.py asks for version 5.11 or greater: 

https://github.com/PixarAnimationStudios/OpenTimelineIO/blob/master/setup.py#L445

It is possible that something is not working in otioview in newer PySide. Can you try running otioview with PySide 5.11 or 5.12? You should be able to install that into a virtual environment with pip.

I get the following with PySide 5.11:

ImportError: /usr/lib/x86_64-linux-gnu/libQt5Core.so.5: version `Qt_5.11' not found (required by /home/gga/.local/lib/python2.7/site-packages/PySide2/libpyside2-python2.7.so.5.11)

As I said, the problem seems Qt related more than PySide related.  If I write a simple script, like:

---

#!/usr/bin/python

from PySide2 import *

-----

I get the same error.  It seems I would need a PySide2-5.0.9 to make it work, but it no longer exists.

With the list of PySide, I get:

$ pip install PySide2==2.0
Collecting PySide2==2.0
  Could not find a version that satisfies the requirement PySide2==2.0 (from versions: 0.0.0a1, 5.11.0, 5.11.1, 5.11.2, 5.12.0, 5.12.1, 5.12.2, 5.12.3, 5.12.4, 5.12.5, 5.12.6, 5.13.0, 5.13.1, 5.13.2, 5.14.0, 5.14.1)
No matching distribution found for PySide2==2.0

When I run it under python3.6, I get the core dump with PySide 5.11 or 5.12.

_._,_._,_

-- 
Gonzalo Garramuño