image quality for 480i signals are off.

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  • #26950
    Have a Nice Day
    Participant

    Hello

    I’m a recent owner of the OSSC that mainly got so I can record gameplay footage from my PS2, I had many problems trying to figure out a way to capture high-quality footage as all of the options either didn’t grant me the quality that I aim for, had compatibility problems with my capture card or outright never worked with my setup.

    You see, one of the major problems that I’m having with the most of these setups that I tried is my capture card inability to deinterlace 480i signals, and to solve that issue with something other than getting a new capture card that is capable of deinterlacing (an inconvenient option for multiple reasons) is to get something that can deinterlace the signal before sending it to my capture card.

    I’ve already figured out that the image quality for interlaced signals with the OSSC is going to suffer, and people on the interwebs suggest that letting the OSSC passthrough the signal will allow the monitor to do the deinterlacing, remedying the issue. And therein lies a problem, letting the signal going to my monitor still looks the same deformed image regardless of wither I allow the OSSC to deinterlace or pass the signal through, in fact, it resulting image quality almost EXACTLY looks the same while applying these two options.

    Here’s a video that I made comparing the image quality that I get from the OSSC compared to “what it sposed to look like” with the help of emulation.

    Mind you, this footage was captured using bob line2x deinterlacing, but the results are almost exactly the same, if not worse, if I would use passthrough mode.

    My problem is with the dithering effect that is easily noticeable (for those that don’t know what dithering is: https://i.imgur.com/7cFadPp.jpg )

    View post on imgur.com

    View post on imgur.com

    View post on imgur.com

    TL;DR:
    -OSSC IQ sucks with interlaced signals.
    -Internet says use passthrough mode to fix.
    -Passthrough mode gives similar results if not worse.

    FYI: my setups goes as following:

    PS2 —–> OSSC (via component cable) —–> HDMI splitter (for monitor and capture card)

    1) I tried eliminating the splitter since I thought it might be the culprit, but the results didn’t change.
    2) My monitor is capable of deinterlacing; I have multiple signal converters that passthrough the signal and the resulting image quality is really good, far, far more superior than what I get from the OSSC in passthrough mode.
    3) I did check out the wiki and tried to tinker with values for more than 4 hours, but only blindly tinkering without having any ideas what these values actually contribute.

    So what seems to be the problems here? are there some settings that I need to tweak so I can get better image quality in passthrough mode? Do I have a faulty OSSC? Please help identify the problem and, if possible, advise me with a solution that helps me get better IQ from my PS2 games.

    #26951
    nmalinoski
    Participant

    Two things that come to mind for me. First, as far as your capture card not being able to deinterlace, have you considered using alternate software, like OBS, to deinterlace for recording/streaming?

    Secondly, marqs has created a test firmware (here) that fixes some wonkiness with 480i over HDMI. I would give this firmware a shot to see if it allows your monitor to deinterlace the passed-through 480i from your PS2.

    #26952
    Have a Nice Day
    Participant

    I always record using OBSS. The main problem that I’m having with passthrough mode that if my capture card manages to get a signal it doesn’t come out as 480i60, it comes out as 480i30 where the image looks bad or sometimes in a weird 720*240 resolution. That’s true for all the signal converters that I tried so far including the OSSC. I have an Avermedia Live Gamer HD Lite internal capture card.

    Thank you for hooking me up with the custom firmware, I assume that I can rollback to the previous firmware if this one doesn’t work?

    #26955
    nmalinoski
    Participant

    Yes, you can reinstall 0.83, or whatever; there’s no forward-only restriction on firmware installation.

    For video modes, the PS2 will go as low as 240p, which is probably that 720×240 resolution you encountered. If you don’t want to deal with 240p, or your hardware doesn’t properly support it, you can have the OSSC line-double it to 480p.

    As for OBS and 480i, I’m not sure why it’s collapsing 480i60 into 480p30 instead of deinterlacing to 480p60. Do you have 60fps output enabled in the Video options?

    #26958
    Have a Nice Day
    Participant

    I tried a lot of things to try solving the problem way before getting the OSSC, my capture card can’t do deinterlacing at all and that’s the reason why I’m having trouble with 480i not being captured at 60fps. AmarecTV does the job but with significant image quality downgrade.

    I just tried the custom firmware and the results are the same unfortunately, the dithering is still there in all modes.

    #26973
    Have a Nice Day
    Participant

    Am I the only one that’s ever had this problem? is there a chance that I received a bad unit?

    #27766
    marqs
    Participant

    You might want to try firmware 0.84 which added 480i indication in metadata for displays that cannot properly decode information from the video signal itself.

    #27849
    Have a Nice Day
    Participant

    Thank you for still following the issue. I’m not gonna be able to access my recording setup anytime soon, but I’ll make sure to test the new firmware and report back as soon as I have the chance.

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