Mednafen video slow/ audio choppy [SOLVED]

UPDATE: I was able to find the problem. Apparently (and sorry if this is known) having the rewind feature enabled gets this type of scenario. I had it true by default from the start, and this is the first core that gave me problems with it. As soon as I falsed it, games started to work as they should.


Hey guys, how are you?

I started messing with PSX emulation and tried mednafen for it. With the regular core I get very slow video (and cannot pass 37 fps) and I get choppy audio. I tried tweaking driver/video/sound/core; everything (I think) but cannot get it right. In the log I could not find something that tells me what´s going on. One line I found that maybe you guys find important is “Does not have enough samples for monitor refresh rate estimation. Requires to run for at least 4096 frames.”. Dont know.

I then tried with HW, but it crashes. In the log I got something:

RetroArch [ERROR] :: Softfilter does not support input format. RetroArch [ERROR] :: [SoftFitler]: Failed to create softfilter graph… RetroArch [ERROR] :: Failed to load filter. RetroArch [INFO] :: Video @ fullscreen RetroArch [ERROR] :: [Vulkan]: Failed to open Vulkan loader. RetroArch [ERROR] :: [Vulkan]: Failed to open Vulkan loader. RetroArch [ERROR] :: [Vulkan]: Failed to create Vulkan context.

This machine I am working on is an i3 1.8Ghz with 4Gb. Let me know if you have any tips about this, or if I need to install something else in the machine (I read in a topic that somebody got it running with VUlkan after installing the SDK).

The game that I got and use for testings is Crash Team Racing. I do have all the Bioses; could it be that wrong bios checksum would lead to lag/choppyness?

I will stop with the wall of text. Any help will be appreciated! Thanks!

slow video with the regular psx core? something seems to be really wrong with your configs or most probably your pc in general.

Yeah, I thought so, as the n64 and dc ones work flawlessly in this set, and I think they are as demanding as the psx one. wertz (or anybody reading this), if you have a working mednafen, share your cfg content if you don´t mind, so I can compare it to mine and maybe find the problem. Cheers!