Is this amount of flickering normal?

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  • #26061
    Matias
    Participant

    I am using ossc with sync on luma rgb cable, resolution is 625i and monitor is asus vg275q. (Tweet says 480i but it is actually 625i

    Flicker is in whole screen but video does not capture it well except in icons. Is this amount normal? Unfortunately, passthrough does not help either and it is fairly similar in bob x2 and bob x4.

    #26066
    marqs
    Participant

    The video doesn’t seem show it properly, but yes, that level of flicker is expected from interlaced sources which don’t use any flicker filter. Any scaling and framerate conversion performed by the display / capture card is also going to make it worse. It seems that vg275q doesn’t indeed support interlaced sources, but fortunately at least most PSX games use non-interlace modes primarily.

    #26067
    nmalinoski
    Participant

    Yes, this is how bob deinterlace normally looks. If your monitor doesn’t deinterlace, you’ll need a secondary video processor that can handle at least 480i/576i.

    Also, the OSSC’s readout reports total line counts, not visible lines; so 625i (total) is synonymous with 576i (visible), and 525i (total) is synonymous with 480i (visible).

    #26072
    Matias
    Participant

    Ok, thanks!

    Good to know, I think I will return this monitor and try dell s2719h that should support 480i/576i. I thought that I could manage with some flickering but this may be too much for my liking.

    My main retro source is ps2 and in some games flicker is bearable, in some it really hits the eye. I must say I am a bit disappointed since otherwise this monitor was performing great and colors and screen in bob x4 looked fantastic.

    #26083
    nmalinoski
    Participant

    My main retro source is ps2…

    The vast majority of PS2 games are 480i, and OSSC is not really suitable for interlaced sources when you can’t do passthrough, as you’ve seen; however, you do have a few options:
    1. Try to get a monitor that will do 480i (passthrough) and/or 1440i (line3x) over HDMI (what you’re doing now);
    2. Try to force games to 480p using GSM, with or without Open PS2 Loader (avoid interlacing altogether);
    3. Get a secondary video processor that will deinterlace (VP30, VP50, DSC 301 HD, etc.);
    4. Get a Framemeister (Doesn’t excel at 480p, but does great with 480i).

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