Neo Geo MVS refresh rate?

[Redifer]

As we all know, the video refresh rate for our NTSC-speed consoles is 59.94Hz. This type of video generally captures fairly well (temporally, anyway) into my computer. Recently I borrowed a Neo Geo MVS to capture some Metal Slug X video. It connected to a spuergun and whatever is connected to that is what sets the refresh rate (Jaleco arcade games, for example, are around 57Hx for whatever reason). The MVS video captured a little odd, kind of like Jaleco games to with temporal artifacts (not combing/interlacing artifacts... hard to describe).

I am wondering if the MVS is locked at 60Hz instead of 59.94Hz since it is meant to be played on an RGB monitor instead of a television. Does anyone know? Sorry if I'm not making much sense.

[Majors]

Not an expert, but MVS is out-ing 15hz(or whatever arcades need), it's your sync circuit/video convertor in your supergun that get's you comp/s-vid you need to get specs on. It's making it 30/60hz so you can see it on your TV.

[Redifer]

But it works perfectly without errors on Fantasy Zone. Different arcade games have different refresh rates. Usually in RGB this does not matter.

[Majors]

I've seen PCB's vary on their video output. I have to adjust all my monitors when I switch games. I know the Seibu SPI board(Raiden Righters, etc) has a funky hz, does not play well with all my cabs. Sounds like the MVS is messing with your setup...you could consolize it and get composite.

Head to Neo-Geo for your tech spec needs.

Edit: Opps, I forgot, you have a supergun doing the vdeo conversion. Sratch that idea. NG must be too powerful and awesome for being recorded Does the AES do the same?

Side note: I appec Game Sack using real hardware and avoiding EMU for it's vids.

[Redifer]

The AES video works perfectly. Yes, real hardware whenever possible.

For example, instead of a solid flash when the shot gun is fired in Metal Slug X, I often get this when capturing video:



This will usually last only a few seconds before it gets mostly OK, then it goes back to this.

[Majors]

That is crazy. Are there any video proccessing functions in your video capture card or software? I'me sure you messed with all that, NG is 20 some years old...it's not a Pokemon, can't catch(ure) them all

[Redifer]

Well the artifacting is happening in the capturing device. Obviously the MVS isn't drawing the screen that way, but what I assume is happening is that the capture device gets confused with the slightly different refresh rate. It looks mostly fine when played on a CRT SD TV. There are no settings for the capture device, it just converts analog video and audio into a MiniDV stream.

[Majors]

It's a long shot, but have you tried to run the video through a VCR or even a receiver? I had and (shitty)modded 2600 that would not sync on a Sony (but fine on a other CRTs) that I ended up running through a VCR and it seemed to clean up the signal, or regulate it for lack of a better term. Does you TV have video out or are you using a pass-thru capture device?

[daskrabs]

MVS vertical refresh rate is an odd 59.1856060~ Hz.

[Redifer]

I don't have any VCRs with s-video. All my Super VHS machines have died. I also don't have the MVS any more (it was never mine). Actually, come to think of it, I do still have a working Hi8 deck with s-video.

MVS vertical refresh rate is an odd 59.1856060~ Hz.

So it's actually slower than the AES (which is 59.94)? AES 4 LIFE BLAST PROCESSINGZ!