The slight fmv stutter also goes away on proton 8.0-5 on my deck, I also dunno if this is dxvk related or not but the game just softlocks outright as soon as the fmv finishes, does not matter if you let it fully play or skip it.
fwiw on Windows (only place I've tested so far) it black screens at the video both with master, 2.3.1 and 1.5. Plays fine when i throw d3d9.deferSurfaceCreation = True at it though.
I bisected and found the first bad commit to be 17577294, with the previous commit (5ae3cfe4) the video still loads in both my computer with a rx 6600 and mesa 24.1.3, and a steam deck oled on steamos beta.
SRC: 276367 @11 IDirect3DDevice9::CreateOffscreenPlainSurface(this = 0x9430720, Width = 1920, Height = 1088, Format = D3DFMT_NV12, Pool = D3DPOOL_DEFAULT, ppSurface = [0x94abb88], pSharedHandle = NULL) = D3D_OK
DST: 276339 @11 IDirect3DDevice9::CreateOffscreenPlainSurface(this = 0x9430720, Width = 1280, Height = 720, Format = D3DFMT_X8R8G8B8, Pool = D3DPOOL_DEFAULT, ppSurface = [0x94ab8e8], pSharedHandle = NULL) = D3D_OK
276434 @11 IDirect3DDevice9::StretchRect(this = 0x9430720, pSourceSurface = 0x94abb88, pSourceRect = [{left = 0, top = 0, right = 1920, bottom = 1080}], pDestSurface = 0x94ab8e8, pDestRect = [{left = 0, top = 0, right = 1280, bottom = 720}], Filter = D3DTEXF_POINT) = D3DERR_INVALIDCALL
proton 8.0-5x1 2024-07
The first FMV partway into the game renders as a black screen. Previous behavior was that it played with visuals, albeit it may have had stutter. Using some prebuilt Proton builds, I narrowed it down to being after commit 1783b9591af787bc41dcdf8994158f67bb00fae5, and happening at or before commit bbe851f6a25b57f320362c97b12afc52bfa99da1
You can get to the FMV by starting a new game and holding down the left mouse button. This will fast forward through text. You will have to click on the screen once in the middle of fast forwarding to select a dialogue option. The one you select does not matter, and you can just left click anywhere on the screen to select the default.
Software information
AQUARIUM (2515070), default settings.
System information
Log files
steam-2515070.log