OSSC (DIY video digitizer & scandoubler)

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marqs
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Re: DIY video digitizer & scandoubler

Post by marqs »

paulb_nl wrote:Thanks. Could you also add the SNES de-blur to the wiki?
You mean compensation of blur associated with early models? That'd be more complex to implement with avaiable FPGA resources.
headlesshobbs wrote:I managed to get the vga signal to finally stop pulsing after the advice I was given (thanks), but there's still a good deal of bloom with the whites and I'm not having luck with figuring how to adjust contrast levels directly. Marqs, do you know if there is a proper setting for this?

I've had some idea that I may need to put some resisters into the cable itself to alleviate the problem, but I'm not at all sure how I'll get around to doing that.
etsuna wrote:The OSSC doesn't work with my slot 2 mvs and slot 4 mvs.
Anyone have settings for this? Thanks for your answers.
Please add support queries on the dedicated VGP forum, and read also this before posting. In most cases with MVS, the problem is display not accepting MVS refresh rate or linedoubled line count.
paulb_nl
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Re: DIY video digitizer & scandoubler

Post by paulb_nl »

marqs wrote:
paulb_nl wrote:Thanks. Could you also add the SNES de-blur to the wiki?
You mean compensation of blur associated with early models? That'd be more complex to implement with avaiable FPGA resources.
Yea the reversal of the blur filter in the early models. I posted it also in the feature request forums. https://www.videogameperfection.com/for ... s-de-blur/

I don't think its complex at all? You only need the previous and current pixel and use a simple formula to calculate the original non-blurred pixel.
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bobrocks95
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Re: DIY video digitizer & scandoubler

Post by bobrocks95 »

paulb_nl wrote:Yea the reversal of the blur filter in the early models. I posted it also in the feature request forums. https://www.videogameperfection.com/for ... s-de-blur/

I don't think its complex at all? You only need the previous and current pixel and use a simple formula to calculate the original non-blurred pixel.
Is it a genuine blur filter or just a lower-quality analog signal from non 1-Chips?
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paulb_nl
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Re: DIY video digitizer & scandoubler

Post by paulb_nl »

bobrocks95 wrote:Is it a genuine blur filter or just a lower-quality analog signal from non 1-Chips?
I don't believe it is a lower quality signal. They are using a specific low pass filter. High contrasts are smoothed out but yet a high contrast transition to black is unaffected. Otherwise a lot of the black color would be grey and the image would look washed out.
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bobrocks95
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Re: DIY video digitizer & scandoubler

Post by bobrocks95 »

paulb_nl wrote:
bobrocks95 wrote:Is it a genuine blur filter or just a lower-quality analog signal from non 1-Chips?
I don't believe it is a lower quality signal. They are using a specific low pass filter. High contrasts are smoothed out but yet a high contrast transition to black is unaffected. Otherwise a lot of the black color would be grey and the image would look washed out.
I wonder if that Japanese "de-blur" mod is an analog way of reversing the LPF then, instead of the digital method you laid out.
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eric90000
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Re: DIY video digitizer & scandoubler

Post by eric90000 »

Is there any major advantage to using 480P lineX2 for 3D games? I tried it this evening on my original Xbox playing Indiana Jones, my TV accepts it fine and it's listed as 1440 x 960 I think. Only difference I can see is that it's a little bit sharper, edges are a tad bit more jaggy and it may be a little bit clearer. However, the screen size is a little bit smaller horizontally as my TV can only display it as 4:3 or 16:9 (as opposed to "original" on 480P mode).
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NormalFish
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Re: DIY video digitizer & scandoubler

Post by NormalFish »

eric90000 wrote:Is there any major advantage to using 480P lineX2 for 3D games? I tried it this evening on my original Xbox playing Indiana Jones, my TV accepts it fine and it's listed as 1440 x 960 I think. Only difference I can see is that it's a little bit sharper, edges are a tad bit more jaggy and it may be a little bit clearer. However, the screen size is a little bit smaller horizontally as my TV can only display it as 4:3 or 16:9 (as opposed to "original" on 480P mode).
just a matter of preference
Gnomenthusiast
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Re: DIY video digitizer & scandoubler

Post by Gnomenthusiast »

So, I found a small problem (not related to OSSC, but involves it).

My BenQ W1070+ projector got a new home in a ceiling mount yesterday. To facilitate this, I'm using the FHD Wireless setup that came with the projector.
Using this, Line double mode works, but Line triple does not. The wireless kit seems to support 720p and 1080p fine. The projector supports line triple on it's own connected directly with HDMI.

Am I going to have to run an HDMI through my victorian coving to have a direct connection, or is there something I can connect before the projector to make the signal 1080p before it goes to the projector?

Thanks in advance
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Thomago
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Re: DIY video digitizer & scandoubler

Post by Thomago »

I just found out that the "Save settings" function doesn't save any changes to Advanced timings.

Is that meant to be that way?
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Fudoh
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Re: DIY video digitizer & scandoubler

Post by Fudoh »

Am I going to have to run an HDMI through my victorian coving to have a direct connection, or is there something I can connect before the projector to make the signal 1080p before it goes to the projector?
you can combine the OSSC with another video processor (e.g. a DVDO) to upscale the image to 1080p in advance.
Gnomenthusiast
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Re: DIY video digitizer & scandoubler

Post by Gnomenthusiast »

Fudoh wrote:
Am I going to have to run an HDMI through my victorian coving to have a direct connection, or is there something I can connect before the projector to make the signal 1080p before it goes to the projector?
you can combine the OSSC with another video processor (e.g. a DVDO) to upscale the image to 1080p in advance.
Ah, I had a look back along the thread, unfortunately neither of the DVDO models mentioned seem to be available anywhere here (eBay etc.).

What other models of scalers would work?

I'm strongly considering just running the cable (the wireless link in the system is making my uneasy anyway, it seems to work fine, but its a weak link in the setup.
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Re: DIY video digitizer & scandoubler

Post by Gnomenthusiast »

Simon Belmont wrote:I can't believe this. I tried my cheap scaler which also has a HDMI in as well as scart. The OSSC works like a dream now. Wow the picture looks great in line double. in 720p or 1080p. X3 is very sharp, but looks more pixelated where 2x is very smooth. I'm happy with my OSSC now. Hardly any lag as well if any? I'm shocked.

Who would have thought a cheap scaler would work so well.
Simon,

Can you post the details of the cheap scaler you used between the output of the OSSC and the display?

I want to try it as a cheap solution to my wireless transmitter problem.

Thanks in advance,
h1ghju1ce
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Re: DIY video digitizer & scandoubler

Post by h1ghju1ce »

Yeah those DVDO Units are getting pretty rare these days, I think it took about a year of having a "followed search" on eBay to get my VP30, and another 2 years later to get my VP50 Pro !


I guess if Marqs ever made a 3rd hardware project (2nd one MAYBE being the "line-halfer" , OSSH? :wink: ) that was a feature cut down framebuffer based upscaler that was meant to be paired with the OSSC I suspect most feedback would just be people moaning that it didnt include feature X / Y that was already a function of the OSSC.

I guess you'd *Then* need 2 versions of that, the OSSC paired version, and a "all-in-one" version that had the features of both.

But jeez, I dont know how much free time he has , but I suspect that wouldnt see the light of day for another 2 years even if it was something he wanted to do!
Woozle
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Re: DIY video digitizer & scandoubler

Post by Woozle »

Received my OSSC today (I put the wrong address in the original order...woops. Thanks for being so helpful on that Bucko). Really liking the OSSC so far, my only complaint is the finicky remote. It only works at certain angles/distances, but at least it works. Another weird oversight is the lack of screw connectors on the DVI connector, I know it adds a few dollars to the cost but it would've been nice to have.

Line triple works great with the Genesis 1, SNES mini, and NESRGB on my 40" Sony KDL-40BX420 (cheap walmart TV from ~5 years ago). Luckily I can use the VGA audio input on the TV for the 1st HDMI input (doesn't work on second), so I'm all set as far as audio integration goes.

Tried it with my XRGB-1 to line double the 240p and let the OSSC line double again for an effective 4x scale. It worked, but I think I need to tweak the sampling because there were tons of edge errors. I could shift it to right or left edges, but I couldn't completely remove it. Line triple from just the OSSC alone looks way better.

I also noticed console video errors (jail bars and other oddities) are more visible on the OSSC than my XRGB-mini. I haven't done side by side, but so far it's not that big of a deal. I also noticed stuttering/hitching with SNES but that's probably my TV and not the OSSC.

Seeing the OSSC in action puts a big ass smile on my face, thanks to all those involved.
Last edited by Woozle on Mon Nov 28, 2016 5:46 pm, edited 1 time in total.
Gnomenthusiast
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Re: DIY video digitizer & scandoubler

Post by Gnomenthusiast »

I forgot to add that it's not just on line triple when the signal drops out.

In Sonic 2 when you hit the bonus "run the gauntlet" level, the display cuts out even at line 2x. When the level is over and back to 2D, the picture re-appears.

This is definitely not the OSSC's fault, It's the processing box for the wireless transmitter not being able to deal with the resolutions involved, which is a shame.
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Simon Belmont
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Re: DIY video digitizer & scandoubler

Post by Simon Belmont »

Gnomenthusiast wrote:
Simon Belmont wrote:I can't believe this. I tried my cheap scaler which also has a HDMI in as well as scart. The OSSC works like a dream now. Wow the picture looks great in line double. in 720p or 1080p. X3 is very sharp, but looks more pixelated where 2x is very smooth. I'm happy with my OSSC now. Hardly any lag as well if any? I'm shocked.

Who would have thought a cheap scaler would work so well.
Simon,

Can you post the details of the cheap scaler you used between the output of the OSSC and the display?

I want to try it as a cheap solution to my wireless transmitter problem.

Thanks in advance,
Sent info to your PM mate
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fafangus
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Re: DIY video digitizer & scandoubler

Post by fafangus »

For iscan upscaler try avforum or avsforum
Gnomenthusiast
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Re: DIY video digitizer & scandoubler

Post by Gnomenthusiast »

Is a DVDO iScan VP30 and use for this?
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Fudoh
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Re: DIY video digitizer & scandoubler

Post by Fudoh »

yes, the VP30 is fine.
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Galdelico
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Re: DIY video digitizer & scandoubler

Post by Galdelico »

Thomago wrote:I just found out that the "Save settings" function doesn't save any changes to Advanced timings.

Is that meant to be that way?
Ha, that's the reason why I noticed some Mega Drive games required an additional centering, even after I already centered the frame via backporch adjusting... Turning off and on again the OSSC actually reset the changes I made. :D
Thanks for pointing this out, I would've figured it out so much later, if ever.
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Thomago
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Re: DIY video digitizer & scandoubler

Post by Thomago »

Okay, so it isn't just me :D

Another thing: What's the deal with the "Sampling phase" setting? If I, say, go from the default 180° to something lower and then back again to 180°, it happens that I get a completely different result (e.g. a very blurry picture instead of a sharp one).
The setting behaves completely erratic!
paulb_nl
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Re: DIY video digitizer & scandoubler

Post by paulb_nl »

Thomago wrote:Another thing: What's the deal with the "Sampling phase" setting? If I, say, go from the default 180° to something lower and then back again to 180°, it happens that I get a completely different result (e.g. a very blurry picture instead of a sharp one).
The setting behaves completely erratic!
Yes thats a known issue. H.samplerate setting is also affected. Marqs has said it has something to do with the PLL config used in the digitizer.
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Galdelico
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Re: DIY video digitizer & scandoubler

Post by Galdelico »

Thomago wrote:Okay, so it isn't just me :D
Hope we aren't! XD

I brought this subject up on the VGP forums too. I'll give you some update if/as soon as I get a reply.
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Thomago
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Re: DIY video digitizer & scandoubler

Post by Thomago »

No need to do that: I'm active both here and there :)
Gnomenthusiast
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Re: DIY video digitizer & scandoubler

Post by Gnomenthusiast »

BuckoA51 wrote:Anyone want an audio upgrade? I've got a small number available if anyone wants to send in their OSSC for an upgrade.

https://www.videogameperfection.com/pro ... e-service/

Hopefully more in the new year.
Damn, did I already miss this?

If you get the upgrade, does that route the audio to the DVI (then to HDMI via a passive connector?).

If so I need this but it seems to be sold out.
tacoguy64
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Re: DIY video digitizer & scandoubler

Post by tacoguy64 »

Haven't really had much time with messing with this since I have been playing the new pokemon but this thing pairs really well with PC crt monitors if you guys were wondering. I picked up a 22" inch hp p1230 crt "diamondtron" the other day and the thing looks amazing. Like I said still haven't gotten around to messing with it but I think this device along with a pc crt would make a great alternative to owning an actual rgb monitor.
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Guspaz
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Re: DIY video digitizer & scandoubler

Post by Guspaz »

Which DVI-to-VGA converter are you using with that?
Mikeyy00
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Re: DIY video digitizer & scandoubler

Post by Mikeyy00 »

Received mine in the mail today..

This thing is a beast!!

At first it wouldn't recognize any of my scart connected stuff, turned out the cable between my switch and OSSC was a bit suspect.

Does SNES/NES/n64/PC-E/PS1/Genesis on scart with no issue (even at 3x), DC through VGA looks great, and my OG Xbox on Component is pretty good too.. bit dark though. I'm guessing we can't change brightness on the OSSC, I'll probably have to use my TV controls?

TV is a Toshiba 55 inch (but not really a Toshiba, re-badged Hisense / maybe Insignia aka no name Chinese panel. Edit: Model is 55L421U. Only issue I've come across, when selecting 3x, it makes the image full screen (stretched), I can change it to 4:3 manually on the TV, but only if I'm not using the TV's game mode.. on that picture type, it only does Full/Native, and Native at 3x is stretched. 2x doesn't exhibit the same issue.

Hats off, this is a great device!
Last edited by Mikeyy00 on Fri Dec 02, 2016 3:55 pm, edited 1 time in total.
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Blair
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Re: DIY video digitizer & scandoubler

Post by Blair »

Some Direct capture of the OSSC and VP50 (non-pro) combo (Jpg compression is a bit higher than normal on these, as a recent driver update messed with my capture settings and I didn't notice that as I was taking the pictures, sorry about that).

all shots at 720p. (scaled and processed by the VP50).

(source: Sega Saturn model 2, RGB Scart)

1. VP50 Solo, Game Mode 1 (Note: GM1 on a VP50 non-pro has a neat smoothing effect on 240p sources, I think it looks best with 3d games)

Image

2. VP50 Solo, Game Mode 2

Image

3. VP50+OSSC 480p Line double mode

Image

4. VP50+OSSC 720p Line triple mode

Image
Last edited by Blair on Fri Dec 02, 2016 9:40 am, edited 3 times in total.
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Guspaz
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Re: DIY video digitizer & scandoubler

Post by Guspaz »

Mikeyy00 wrote:bit dark though. I'm guessing we can't change brightness on the OSSC, I'll probably have to use my TV controls?
You can, go into the "Video in proc" menu. There are offset and gain settings for all three channels. This can be used to adjust the image (including brightness). It's not really useful until profile support is added, though, since you'd have to either do it every time, or save it and have it apply to all consoles unless adjusted.
Mikeyy00 wrote:Only issue I've come across, when selecting 3x, it makes the image full screen (stretched), I can change it to 4:3 manually on the TV, but only if I'm not using the TV's game mode.. on that picture type, it only does Full/Native, and Native at 3x is stretched. 2x doesn't exhibit the same issue.
There is an aspect ratio setting for 3x, and for some reason it defaults to 16:9 (IMO that's a bad choice for the default). That setting is in the "Output opt." menu, and the one you want is "Linetriple mode". The default value is "Generic 16:9", and you want to change it to "Generic 4:3".

Remember, with all these settings that I mentioned, the settings won't remain after a power cycle unless you save them. This, however, is also very convenient, because it lets you play around with any setting without fear of making some change and not remembering how to undo it. If ever you mess up your settings while playing with them, just flip the power off and on again. Boom, settings reset to saved values.
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