[BOTW] Cutscene visual freeze when using a non-16:9 aspect ratio

[foxsouns]

Describe the issue
In between screen transitions while watching a rendered 2d cutscene, the scene will inconsistently fail to progress, freezing graphics while retaining music (and dialog until next voice file). This is a known bug, typically attributed to FPS++, but turning off FPS++/changing settings does not fix the problem. Bug does not happen when Graphics > Aspect Ratio is set to 16:9. Tested with Impa's cutscene, and confirmed broken with 16:10, cutscene works with FPS++ set to 60 & Graphics > Aspect Ratio set to 16:9.

To Reproduce
Steps to reproduce the behavior:

1. Graphics > Aspect Ratio > 16:10
2. Launch game
3. Cutscenes freeze

Expected behavior
Aspect ratio patch needs to account for slideshow-style cutscenes (Impa's cutscene is an example of this). My best guess is that the camera is going out-of-frame, and this is somehow bugging out the rendering engine and preventing the cutscene from progressing.

Screenshots
If applicable, add screenshots to help explain your problem.

Desktop (please complete the following information):

• OS: Win10 Pro 19045
• GPU: Nvidia GeForce GTX 1060 3GB
• Renderer: Vulkan
• Version: Cemu 2.6

Additional context
(edit, wrong save. for testing, the cutscene before obtaining paraglider is also problematic)
I have a 16:10 monitor. Tested both with & without FPS++.
Full graphic mod list: Camera Sensitivity, FPS++, Xbox Controller layout, Graphics

[foxsouns]

Game appears to also break with native resolutions when the cutscene tries to swap camera angles? I have enabled logging to window and found this would appear each time it froze, confirming my suspicions of invalid window sizes, although I'm unsure why it persists with the correct aspect ratio. Maybe has to do with the mp4 library that CEMU uses? This bug may be better reported to the CEMU page, in that case. I also tested this with graphics mods completely off, and it froze significantly faster than with them on. This makes me suspect that it may have to do with rendering during a lag-frame? The first memory consistently crashes and is significantly easier to test with.

[Exzap]

Sounds like you are running into this cemu-project/Cemu#217 issue. We haven't figured out why but sometimes the game thinks the videos are not playing fast enough (even with a decent CPU) and it tries to restart them and that causes it to freeze. Note that most kind of video playback failure will result in those same error messages so they aren't exactly helpful to diagnose what exactly is going wrong. But the native 720p videos should play just fine and do so for most people.

[foxsouns]

i will post my response there, thanks