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Is it compatible with YPbPr through SCART?

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This topic contains 11 replies, has 5 voices, and was last updated by  QuickRat 2 weeks, 1 day ago.

Viewing 12 posts - 1 through 12 (of 12 total)
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  • #12189

    QuickRat
    Participant

    Hi!

    So, I was thinking about building a setup for both original Xbox and Wii. These two consoles have a quirk: they only allow 480p signal if plugged via component cable.

    The problem is that I have a huge SCART switch but I haven’t a YPbPr one (I would not like to buy one either for just two consoles). So I was thinking about buying two of these:

    http://retrorgb.com/images/WiiPage11.jpg

    Since SCART can handle YPbPr signal, I was wondering if it could be used in an OSSC setup.

    That would save me a LOT of money…

    • This topic was modified 3 weeks ago by  QuickRat.
    • This topic was modified 3 weeks ago by  QuickRat.
    #12195

    Harrumph
    Participant

    Yes, I believe so. As long as the wiring is standardized, which I can’t confirm cos I never used one.

    #12200

    QuickRat
    Participant

    So there should not be any problem at all if I use a Wii with YPbPr out, connect it to a passive YPbPr-to-SCART converter, then to my SCART switch and finally to the OSSC. Am I right? Can anyone confirm this?

    Thank you!

    #12207

    marqs
    Participant

    It should be fine if your scart switch is ‘dumb’, i.e. does not need status voltage or dedicated sync line to switch on target input.

    #12219

    QuickRat
    Participant

    So, things like Gscartsw or W-Hydra (×16 SCART ports) should work fine with this, shouldn’t they?

    #12253

    BuckoA51
    Keymaster

    GScart won’t work as it uses the composite video/composite sync line to detect inputs. I’m not sure what Hydra uses (waiting for Lotharek to get back to me).

    I feed in component video to mine using an Extron Crosspoint, works great. I don’t use the component video inputs at all.

    #12254

    vmagix
    Participant

    The GSCARTSW will default to port 8 if it can’t detect sync… So you “could” have one of those plugged into the GSCARTSW and it’d work fine (it’s what I do for the PS2’s RGsB/sync on green).

    The Hydra has the benefit of a manual switch.

    Just wondering though, where did you find the SCART adaptor with the R/L audio channels? eBay/Amazon (UK) aren’t throwing up anything for me.

    #12306

    QuickRat
    Participant

    @buckoa51: Hm, I’ve talked to Superg, the creator of Gscartsw, but maybe I should contact him again on that topic.

    Component cable is a must for both Wii and Xbox, I am afraid. Other cables would output 480i only, while YPbPr cables output 480p (and 720p in some Xbox games). That’s why I want it to run through a SCART cable and be compatible with Gscartsw (or other devices).

    @vmagix: I would love to know if there is another workaround with this option.

    There is not a YPbPr + Stereo audio to SCART adaptor. It doesn’t exist. Why not? Don’t know, but it’s true. However, Europe has millions of composite+audio to SCART adaptors. So what I want to do is some sort of custom adaptor. A custom PCB with a custom 3D printed case would be the thing. If you are interested, please ask (or suggest, as I’m confused about the use of it along with Gscartsw).

    #12308

    marqs
    Participant

    @quickrat: Such adapter does exist but is just hard to find – I have a couple of these, and while not being best build quality, they do their job just fine.

    #12311

    QuickRat
    Participant

    Oh, thanks a lot, @marqs!

    Now you mention, some people at Shmups are saying that the proper way in order to make this work is:

    Y — Pins 17 and 20 (those used for composite video)
    Pb — Pins 5 and 7 (those used for blue in a RGB signal)
    Pr — Pins 13 and 15 (those used for red in a RGB signal)
    Audio — Pins 2 (R), 6 (L) and 4 (ground)

    Y is being routed to composite video pins instead of green ones because of Gscartsw. It detects the source at pin 20, so if there’s nothing there, it won’t detect it as a valid source and will ignore it (unless it’s in port 8).

    The thing is, would the OSSC be able to handle a YPbPr signal using that setup? In other words, Y signal through pin 20 would be accepted by OSSC?

    #12313

    marqs
    Participant

    No, only sync is processed from pin 20, not luma.

    #12314

    QuickRat
    Participant

    Hm, so the only way would be finding a SCART switch that allows manual selection, am I right?

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