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Grandia FMV Playback Slow #35

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Alextended opened this issue Apr 1, 2024 · 1 comment
Open

Grandia FMV Playback Slow #35

Alextended opened this issue Apr 1, 2024 · 1 comment

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@Alextended
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Alextended commented Apr 1, 2024

I've tried everything, as soon as any Grandia FMV starts the framerate slows so playback is slow and the audio is distorted.

It runs fine in the latest Mednafen and the issue doesn't come up in any other game that I've noticed, in-game or in FMV...

I believe it might be related to this but I'm not entirely sure:
#24

Please fix it someone out there :)

@McRmie
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McRmie commented Apr 6, 2025

Reproduced the issue on my end with the latest beetle_saturn core. Lots of stuttering/slowdowns during the FMVs but then I wondered if it was simply a performance issue.

Sure enough, I upped the audio latency and changed to vulkan instead of glcore (apparently vulkan can be faster than glcore even with non hardware-accelerated cores it seems) and the stutterings/slowdowns during FMV were gone. The FMVs in the game just seem to be very cpu demanding for some reason (maybe video decoding related?).

Try changing some of the settings/drivers in RA -things that might be more demanding cpu wise. Try upping the audio_latency for the game for example. Switch the video driver, or remove some of the lag-reducing options etc. Anything that might lower the cpu costs and see if that makes a difference. Remember that Saturn emulation (and beetle saturn especially) is already relatively demanding.

edit: Am on Windows -Ryzen 7 2700.
edit: Enabling threaded video in addition might help a lot as well (though might add a bit of input lag I believe). Standalone 1.32.1 mednafen saturn might have added additional optimizations which may be why you get full speed or it's the lag-reducing options of RA mentioned above that might add to the requirements for full speed.

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