OSSC (DIY video digitizer & scandoubler)

[orange808]

@Blair

Do you have a sharpness setting cranked up or are you using reverse lpf?

I see ringing.

[Blair]

[@blair
Always great caps, what hardware do you use ?

I've just made a sonic MD1 cap (for others use , my 32X gives me somes glitches...)
https://www.youtube.com/watch?v=_3cYzyR ... e=youtu.be
(OSSC line X5 + Vision E1 RGB)

Thanks fafangus! For this particular recording session I used the portable HDV-UH60. I prefer my LGX but the HDV-UH60 is easier to carry around and it natively supports all of the output modes from the OSSC without the help of a scaler (unlike the LGX). Although I'm starting to wonder if I have an actual HDV-UH60 or a knockoff as I purchased it from eBay. (the HDV-UH60 itself is meant to be a clone of the Magewell XI100DUSB, so there's an inception joke in there somewhere ) here's the product page, http://www.hdcvt.com/index.php/product/des?id=165

BTW, Your mega Drive capture looks really nice. I was trying to pick up a datapath card myself, but the one I ordered was dead on arrival. (So I'm thinking about maybe just picking up a razor capture box). What problems are you having with 32X? I remember something about modifications to the scart cable sometimes needed to get a good stable picture out of the 32x.

@Blair

Do you have a sharpness setting cranked up or are you using reverse lpf?

I see ringing.

Nope, I always try to keep all my settings at default (unless otherwise noted). Are you sure it's ringing? (Could you point out the areas you're noticing?) The only place I noticed anything that looked like that was the control panel in mega Man Battle network (the actual pixel graphics just have a lighter color above the black) but I think that's just a compression error as it's nowhere else in the pic. It might also have something to do with the extremely light 12% scanlines adding a change of contrast. and that can be perceived as sharpness.

But if you get a chance definitely give me some details. (This was a direct capture of the OSSC into my HDV-UH60, so everything should be neutral as possible)

Sonic Advanced

[orange808]

[@blair
Always great caps, what hardware do you use ?

I've just made a sonic MD1 cap (for others use , my 32X gives me somes glitches...)
https://www.youtube.com/watch?v=_3cYzyR ... e=youtu.be
(OSSC line X5 + Vision E1 RGB)

Thanks fafangus! For this particular recording session I used the portable HDV-UH60. I prefer my LGX but the HDV-UH60 is easier to carry around and it natively supports all of the output modes from the OSSC without the help of a scaler (unlike the LGX). Although I'm starting to wonder if I have an actual HDV-UH60 or a knockoff as I purchased it from eBay. (the HDV-UH60 itself is meant to be a clone of the Magewell XI100DUSB, so there's an inception joke in there somewhere ) here's the product page, http://www.hdcvt.com/index.php/product/des?id=165

BTW, Your mega Drive capture looks really nice. I was trying to pick up a datapath card myself, but the one I ordered was dead on arrival. (So I'm thinking about maybe just picking up a razor capture box). What problems are you having with 32X? I remember something about modifications to the scart cable sometimes needed to get a good stable picture out of the 32x.

@Blair

Do you have a sharpness setting cranked up or are you using reverse lpf?

I see ringing.

Nope, I always try to keep all my settings at default (unless otherwise noted). Are you sure it's ringing? (Could you point out the areas you're noticing?) The only place I noticed anything that looked like that was the control panel in mega Man Battle network (the actual pixel graphics just have a lighter color above the black) but I think that's just a compression error as it's nowhere else picture or the sonic pictures. It might also have something to do with the extremely light 12% scanlines adding a change of contrast. Another possibility is that my capture device is only recording at YUV 4:2:0 instead of RGB 4:4:4 and it might be causing some kind of weird chroma issue.

But if you get a chance definitely give me some details. (This was a direct capture of the OSSC into my HDV-UH60, so everything should be neutral as possible)

Sonic Advanced

Could you post some without scanlines?

[Blair]

Sure, i'll make some shots with scanlines off tonight. but if you checkout my mega Man Battle network video, the first half is without scanlines. (don't forget to like and subscribe, lolz )


Mega Man Battle Network 3 + OSSC
https://www.youtube.com/watch?v=DMlPCqvSzDY

[Syntax]

@Blair take a look at your sonic screenshot, the time/score numbers are ringing or ghosting hard.

Scanlines actually reduce artifact visibility so I wouldn't blame them.

[Blair]

@Blair take a look at your sonic screenshot, the time/score numbers are ringing or ghosting hard.

it doesn't look like usual ringing to me, just looks like compression artifacting and maybe some analog interference (from my GameCube component cable?). if there was unnatural ringing there should be hard white contrast edges (like a halo effect), especially around sonic himself. (however this example looks a bit more like false contouring but it's not consistent throughout the image so that's why I'm leaning more towards compression/chroma artifacts. if you look closely you'll notice the artifact has a slight green tint) but i'll adjust some settings in OBS to see if I can mitigate any visual anomalies. (could also just be the capture device I'm using at the moment, if I get a chance I'll do a comparison with the LGX)

*edit2*

after some investigation using the GameCube version of the 240p test suite, it seems that the anomaly is being generated either by

1. The GameCube
2. The Component cable,

I'm betting it's either one of the first two, I'll have to do a little more investigating later but it appears that my GameCube or component cable has a slight ghosting issue, (not ringing).

just tested by directly connecting to an HDTV, and its the same result so it's not the OSSC's fault or the capture hardware. that's just how my GameCube looks right now. (hopefully citrus's GameCube HDMI project works out)

Scanlines actually reduce artifact visibility so I wouldn't blame them.

I blame scanlines for everything.

Spoiler

[TooBeaucoup]

I just ordered an OSSC last week, should be here in a day or two. I already have a Framemeister, but can't help myself when it comes to tech like this. I had to compare the two. Ah well, what's a couple hundred bucks in the grand scheme of life! LOL!

[Syntax]

@Blair
That meme made my afternoon
I was pretty much taking a guess at what I was seeing in your screen shot was ghosting or ringing.

It's hard to tell what's going on really, in the gameplay screen shot the right edges of the top of the cave are green, and the same goes for some edges in your Sonic title screenshot. Is it just the game?

[Galdelico]

Apologies for the crappy cellphone shot, which utterly destroyed the colours...



Game Boy Interface (Low Latency Version) > PAL GameCube + Nintendo RGB Scart Cable > OSSC Line4x (Generic 4:3)

[Xyga]

And I have a question: The VX3211-mh has an option for reducing input lag; it's active by default. What happens to the lag if you deactivate it?

About that; it changes nothing for the LB, lag remains the same... the manual doesn't help either so I have no idea what it really does, could be a another BS marketing fake-feature.
Or is it a deinterlacing method option? Gotta try this later.

EDIT: found this https://www.viewsonic.com/eu/products/l ... ut_lag.pdf
Maybe it's an option meant to work with other models and that just got left here in the firmware while it's not needed on the VX3211-mh, because so far I haven't noticed any sort of actual processing, maybe the dynamic brightness thing but I won't use it anyway...

[Thomago]

Possible. I have seen this option with one other monitor, the AOC Agon AG 272FCX; there it had actual effects, as it made the monitor more compatible to non-standard refresh rates, like from the SNES.
I tried if deactivating the option helps with SNES LineX5 mode; it doesn't. Also, the monitor doesn't seem to kepp the setting; as soon as I changed the source, "Low Input Lag" was back on.
Well... I won't bother.

[Milspex]

Simple question: Does the OSSC do 720p passthrough ? (component original xbox 720p goes in, 720p hdmi goes out?

[Xer Xian]

@Galdelico: Great shot! Thick scanlines are really a must for the very low-res GBA games imho.

Simple question: Does the OSSC do 720p passthrough ? (component original xbox 720p goes in, 720p hdmi goes out?

Yes. It will also let you select the correct color space setting for HD (Rec. 709) for optimum color fidelity.

[Blair]

made some HDMI captures and video of the OSSC 1.6 + Edge Green 480p/960p to 1080p upscale

GameCube Component out (YUV)
Swiss 480p video mode: forced
OSSC modes: 480p pass-through, 480p line2x and 480p up-sample 2x
Generic 4:3

video links
OSSC + GameCube + DVDO Edge Green, resolution showcase with gameplay at 960p (sample2x)
https://www.youtube.com/watch?v=5TNeLna3r9s&t

(Please set youtube quality to 1080p60/GPU video file color space RGB Full 0-255)



Bloody Roar Primal Fury (all shots are 480p up-sample 2x)

Spoiler

Spoiler

[Mantrox]

Quick question folks.
What do i need to connect the PVM(14L4) RGB outputs to an OSSC?
Is a simple BNC to male scart cable enough to do the job or am i going to need something else?

I currently have a male scart to BNC cable but i assume the OSSC isn't showing anything because the sync must be on the wrong pin since the cable itself was wired for output, not input.
Am i going to need anything to treat the sync before it going to the OSSC? I hope not =/

[Elrinth]

tested recording line 5x from a rgbmodded snes mini. bought the LG 65SJ805V today I am NOT disappointed. recorded on the datapath visionrgb-e2s.
https://www.youtube.com/watch?v=E07sr3Zyba8

[Dochartaigh]

What do i need to connect the PVM(14L4) RGB outputs to an OSSC?
Is a simple BNC to male scart cable enough to do the job or am i going to need something else?

I took my WookieWin (from eBay) Female SCART to RGB breakout cable (the type you probably have the cable off your video game console plugged into, which then plugs in via BNC's to the back of your PVM-14L4) and put in a MALE SCART head and did have to switch the sync wires because they change depending on direction (I made a topic about it here too I believe - or my troubles with wiring it correctly at least

It was coming off my Extron Crosspoint so it was pure c-sync I believe - I don't know how the OSSC handles different types of sync since I've never had to deal with that before.

[eric90000]

Does anyone know what the correct 'Colour Space' setting should be on a Samsung 4k TV, when using the OSSC? Tested with a Genesis in Lx5 mode:

'Auto' - Slightly brighter than Native setting, seems like there's a slight yellow tint to the image. Looks a bit more natural to my eyes than the intense colours of Native setting.
'Native' - Colours are more saturated looking and it's a little bit darker to my eyes. Reds are very red, greens are very green etc...


Also, does the specific HDMI input matter? There's 4 on my TV which are labeled as follows:

1. STB
2. PC/DVI
3. HDMI 3
4. ARC

Just wondering if there's a benefit to using a specific one with the OSSC.

[Thomago]

"PC/DVI" is probably expecting RGB/full-range signals and might be using less processing, so this input should be perfect for the OSSC.

[Galdelico]

@Galdelico: Great shot! Thick scanlines are really a must for the very low-res GBA games imho.

Thanks!
Yeah, absolutely. I'm still kinda bouncing around clean, optimal profiles and softer, more analogue/CRT-like settings - as I quite can't decide what I prefer the most - but I love how the OSSC is basically able to accomodate both visions.

[BuckoA51]

made some HDMI captures and video of the OSSC 1.6 + Edge Green 480p/960p to 1080p upscale

I'm really into the 480px2 mode with up-sample 2x on, I think it makes the colours look so much nicer on the DVDO and less ringing to boot.

[nmalinoski]

Quick question folks.
What do i need to connect the PVM(14L4) RGB outputs to an OSSC?
Is a simple BNC to male scart cable enough to do the job or am i going to need something else?

If the output from your PVM is going to be TTL, you'll probably want a BNC<->HD15 adapter and run it in through AV3; otherwise, if the output is 75Ohm, then a BNC->SCART adapter will be fine.

I currently have a male scart to BNC cable but i assume the OSSC isn't showing anything because the sync must be on the wrong pin since the cable itself was wired for output, not input.
Am i going to need anything to treat the sync before it going to the OSSC? I hope not =/

If I remember correctly, these BNC->SCART and SCART->BNC adapters are directional; so, if you have a truly SCART->BNC adapter, then you can only convert SCART sources to BNC with it, like if you were to connect a gscartsw to your PVM. To connect your PVM to the SCART input of the OSSC, however, you will need a specifically BNC->SCART adapter.

[Syntax]

How can a bnc>scart be directional? Unless it has a stripper in it the only difference would be a male or female scart head.

[Kez]

The problem is that SCART has input and output pins for sync. So SCART->BNC would pick up sync from pin 20 whereas BNC->SCART would send sync to pin 19. I think the same is true for audio.

Regular male-male SCART cables are actually cross-wired, pin 19->20 etc.

Simply rewiring the cable should fix any issues.

[marqs]

Some hope for people with video/audio sync issues with NES/SNES:

NES/SNES 240p dejitter mod

[Elrinth]

awesome, looking forwards to hear on how we can apply these mods on our own systems.

[クリスチャン]

Now Christian might still be correct if it's a case where the PS2 itself nearest-neighbor stretches the game's internal H-res to fit 640. If that is actually what's happening, then the OSSC has the unique distinction of correcting bad hardware design

I honestly think that's what the DAC is doing, or at least something similar. Otherwise most digital TVs wouldn't work with the PS2. It should be outputting 720x480 (DTV) not 640x480 (VESA) over component. Not really sure what it outputs over VGA though.

[Xer Xian]

I'm really into the 480px2 mode with up-sample 2x on, I think it makes the colours look so much nicer on the DVDO and less ringing to boot.

I was a fan too but recently learned that result can vary somewhat depending on the game. I didn't spot anything too off-putting on Blair's vid but have a look at this Outrun 2 captures (I posted them a few pages back to praise 2x480p but they backfired on me ):

480p: http://image.ibb.co/jb0Tcb/2017111313174962.jpg
960p: http://image.ibb.co/gXnkOG/2017111313180636.jpg
Upsample2x: http://image.ibb.co/b6M7Cm/960p_upsample2x.jpg

Crops (click to open on separate tabs):

(native was a bad choice for a label, it's actually upscaled to 1080p.. the others as well, after the OSSC)

I guess that, in this specific case, the in-game AA is completely defeated by line-doubling..

[クリスチャン]

Finished testing 480px2 mode on the Dreamcast and I am glad to report that it displays a correct aspect ratio on TVs that support 1440x960. I believe the reason why it works is because 1440x960 is considered a 3:2 PC resolution with square pixels whereas 720x480 is considered to be either 4:3 or 16:9 by most displays due to them assuming non-square pixels for that res.

For those displays that don't respect horizontal active area this is a perfect alternative and may even be preferable due to how sharp it looks.

If anybody responsible for the wiki/guide is reading please update it with this info!

[Mantrox]

Just the pin swap on the scart head, made the trick.



Thanks everybody.