PSTV input lag in PSP games Gradius & Salamander Collections

[magus90]

Kind of a necro, but has anyone solved this? Is there a definitive best way to play PSP games at this point on a TV?

Or is emulation the best way at this point? Thank you!

[jd213]

The OSSC has a mode for PSP (although it required additional adjustments in my setup, check the PSP thread on videogameperfection), despite the low rez it looks pretty good with vertical+horizontal scanlines turned on, maybe one of the TV filters. I assume other scalers like the OSSC Pro and Retrotink 4K can handle it well.

Unfortunately I wasn't able to get a usable 15kHz image by outputting the OSSC's PSP image to an HDMI>Component converter though, tried various adjustments including cropping down to 240p but it just showed up as a split-screen. But I'm not much of an expert on the OSSC.

edit: there's also a Hispeedido HDMI mod that replaces the UMD drive on 1000 models, but it reportedly has some lag. Cyo is also working on HDMI mods, but hard to say how close he is to getting it finished: https://www.patreon.com/cyothevile

[Triple Lei]

If you're talking graphics alone, the RetroTINK 4K does a great job with PSP games, on par with the OSSC (which was always better than how the RT5X handled PSP zoom), and it's just shy of the very, very best IMO: a hacked PSTV in 1080i running Sharpscale in Integer mode through a DVDO Edge outputting 1080p60. I just tweeted about it:

https://x.com/triple_lei/status/1919292498662269321

For games with pixel perfect modes (often called "original"), the RT4K is the only way to go! Cropping is easy to understand and the integer/proportional/free-form modes help a ton. Starting with one of Wobbling Pixels profiles as a base, if you set your crops to:

Top Trim: -119
Bottom Trim: -121
Left Trim: -119
Right Trim: -123

This should center on the picture for games with square pixels, which I think is most of them. From here, you can set a vertical and horizontal 4.5x or 5x scale and it looks great. This will depend on the game; Gradius Collection, you want 5x. Metal Slug XX, 4.5x fills the screen and 5x will definitely cut off info. Final Fantasy Tactics: War of the Lions with the unstretch patch, you can get away with 5x as the only thing that gets cut off is the money counter, but 4.5x scale lets you see the full picture and the proper widescreen aspect ratio.

For games without square pixels (basically the Capcom collections), you want Top and Bottom Trim to be -130. I like a 5.000x vertical, 4.000x horizontal integer scale, which I must have picked up from My Life in Gaming a long, long time ago.

Will definitely tweet about this one too. No one better steal credit