Getting the best PSP experience on a Pi 4
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Yeah, Castlevania and Little big Planet were playable on my Pi3, they were both good candidates for upscaling.
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So I found that changing the video mode in the runcommand menu from 1080p to 720p increased performance a little bit. I tested god of war and got about a 2 fps bump. You can go as low as 640x480 for about a 3 fps bump, but the aspect ratio is wrong so I dont recommend it.
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@quicksilver Thanks. I have given that a try. Wipeout runs at full 60fps (so long as you don't cause any explosions) for the whole track. Medieval runs at full speed with 3x resolution (approx 800p).
It does muck up the ppsspp menus a bit but this is a minor problem. With that in mind does anyone know why lr-ppsspp runs slower than ppsspp?
I will also experiment with this on the N64.
Currently running:
Retropie 4.8.9 on a Pi Zero 2W (Overclock Settings: CPU 1400Mhz)
ES-DE on a GMKtec K6 (Windows 11, 32GB RAM) -
This will cause a big performance hit for most 3d intensive games. If you're getting poor performance on a certain game, switch back to 1x .
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@George-Spiggott retroarch seems to have a performance impact on most emulators compared with their standalone counterparts. It's the same with mupen64plus. Retroarch must have some additional overhead or something.
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My vanilla Pi 4B 1 GB runs PSP games great. No overclock or anything. lr-ppsspp is a bit slow though.
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I've been playing GTA: Vice City Stories with this seup in 3x and 1:1 resolution where it plays fairly smoothly. Does anyone know the resolution of 1:1?
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@George-Spiggott said in Getting the best PSP experience on a Pi 4:
Does anyone know the resolution of 1:1?
480x272 is native PSP resolution, so I would assume that's what it is.
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That is 1x in ppsspp. 1:1 seems to be higher res, maybe HD but I can't tell exactly.
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@George-Spiggott maybe the native resolution of your display, or current display mode.
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Since I now have the official release (4.6) and new overclock settings (v3d @ 850) I have gone back to experimenting with PSP settings. I'm currently running Lr-PPSSPP without the modified video mode. I'm getting reasonable results that seem comparable to PPSSPP. I was able to reduce Audio Latency (ms) to 512 (this is not modifiable in PPSSPP AFAIK) which helps with the sound breaks/crackling when the game slows down.
Medieval - Resurrection runs in 1080p (PSP resolution x4) without fault if you're prepared to put up with some fairly heavy breaks in the sound during the intros or 544p (PSP resolution x2) if you're not. Tomb Raider - Anniversary seems no slower in 544p than it was in PPSSPP but with smoother audio. Grand Theft Auto - Vice/Liberty City Stories both seem fine in 544p.
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I have no idea how 4.6 runs. I accidentally bricked my Pi 4.
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@IceChes1 I'm really not trying to highjack this thread but I've got to ask. How did you brick a pi?
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Tried to attach a cooling fan to it which somehow fried it.
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Has anyone managed to get any noticeable increase in performance since installing the new v5.4 kernel? I think there are definitely incremental improvements to both kernel and emulator that have allowed me to reduce my reliance on frame skip.
I did notice that PPSSPP's smoothing seems to have very little overhead and can be used in a few games.
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Simply changing "lower resolution for effects" from off to agressive, causes 99% of the games to run full speed while looking wonderfull at 2x resolution without overclocking.
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@Crush said in Getting the best PSP experience on a Pi 4:
Simply changing "lower resolution for effects" from off to agressive, causes 99% of the games to run full speed while looking wonderfull at 2x resolution without overclocking.
How do you access that? It is greyed out in PPSSPP.
Currently running:
Retropie 4.8.9 on a Pi Zero 2W (Overclock Settings: CPU 1400Mhz)
ES-DE on a GMKtec K6 (Windows 11, 32GB RAM) -
@George-Spiggott said in Getting the best PSP experience on a Pi 4:
How do you access that? It is greyed out in PPSSPP.
I can't think of any option that would disable it, i didn't do anything special to change it.
It's ppsspp not lr-ppsspp. -
@George-Spiggott said in Getting the best PSP experience on a Pi 4:
@Crush said in Getting the best PSP experience on a Pi 4:
Simply changing "lower resolution for effects" from off to agressive, causes 99% of the games to run full speed while looking wonderfull at 2x resolution without overclocking.
How do you access that? It is greyed out in PPSSPP.
I believe the resolution has to be at 2x (or rather above 1x). It seems to make little sense, but God Of War: Chains does seem better with it... Rather counter-intuitive and I haven't played far in but this does seem to work.
Resistance still falls over, but definitely gets further than without the Aggresive setting.
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In LR-PPSSPP there are three frame skip options. Auto (on/off), Number of Frames (0-9) and Frame Skip Type (0-9). Does anyone know what Frame Skip Type is? and what the 10 different settings do?
Also is it possible to activate the post processing effects, specifically FXAA?
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