If PowerDVD can output to side-by-side, you could try to create a profile based on the ‘SBS 3D Base’ profile that I added to the cloud a few weeks ago. Should work with pretty much everything that creates an SBS image using DX9-12 or OpenGL.
- Download the ‘SBS 3D Base’ profile from the cloud in the config app.
- Make a copy of the downloaded profile.
- Assign the main PowerDVD .exe to the newly created profile.
No guarentee that it will work, but provided PowerDVD actually can output SBS (quite likely), your chances are good. Caveat: may not work for content with DRM though. In that case you’ll probably just get a black image even if hooking the app works correctly.
An alternative option would be the vorpX desktop viewer, which can also be configured to process side by side input (on the image page of the menu).