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Slide image left and right..

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This topic contains 12 replies, has 5 voices, and was last updated by  Harrumph 1 month, 3 weeks ago.

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  • #15332

    furiouspaul
    Participant

    Is there an option anywhere for sliding the image left or right horizontally? The Framemeister can do this and it helps my situation a lot, but I don’t see the option in the OSSC (I got the new 1.6 revision).

    #15334

    vmagix
    Participant

    http://junkerhq.net/xrgb/index.php?title=OSSC

    Horizontal/Vertical backporch length
    Sets output backporch lengths, which by default are set to match expected input backporch lengths. Effectively adjusts image position.

    #15407

    furiouspaul
    Participant

    Thanks, but I still cannot get it to work right. I am using SNES and NES. Using Line X3 mode. When I go into advanced timing for 960×240, I can change the horizontal backporch to slide the image, but there are still blank bars on the left and right that I do not know how to get rid of. If i change the H.active it does not do anything.

    Is there something I can do to make this work and slide the image all the way to the left of the monitor like I could on the XRGB-mini?

    #15410

    ShootTheCore
    Participant

    Try adjusting Output Options->Line 3X Mode. From the wiki:

    Line3x mode
    Controls the sampling and pixel clock multiplication mode for line3x.
    Generic 16:9: Uses full horizontal sample rate without pixel multiplication, resulting to fully utilized 1280×720/864 output (16:9 aspect). Useful if connected to a CRT via DVI->VGA converter.
    Generic 4:3: Uses 3/4 of full horizontal sample rate without pixel multiplication, resulting to 960×720/864 effective area of 1280×720/864 output (4:3 aspect). [default]
    320×240 optim.: For advanced users only – requires clock and phase adjustments. Uses a sampling rate which matches the DAC rate of 426 dots per line used by some classic consoles (e.g. several PSX games) in 320×240 mode, resulting to pixel-perfect digitization. Output is pixel-multiplied by 3 in horizontal direction, resulting to 960×720 effective area of 1280×720 output. Note: If picture jitters when this mode is selected, adjust sampling phase until sweet spot is achieved.
    256×240 optim.: For advanced users only – requires clock and phase adjustments. Uses a sampling rate which matches the DAC rate of 341 dots per line used by various classic consoles (e.g. NES, SNES) in 256×240 mode, resulting to pixel-perfect digitization. Output is pixel-multiplied in horizontal direction, resulting to 1024×720 or 768×720 (depending on 256×240 aspect setting) effective area of 1280×720 output. Note: If picture jitters when this mode is selected, adjust sampling phase until sweet spot is achieved.

    #15411

    furiouspaul
    Participant

    Even after messing with all the options (including the 256×240 mode) i am still unable to move the image to the left side of the monitor. Any other advice on this?

    #15415

    Harrumph
    Participant

    Just to be clear, you want to display a 4:3 image on a 16:9 display, you’re not talking about stretching the image, right?

    You could try lowering (instead of increasing) the H.Backporch until the picture wraps around the screen, this does not work on all displays though, and could also demand some adjustment to H.Samplerate and/or H.Sync length, in my experience. If the image drops out, just continue lowering, if your display can handle it, the image will re-appear once the backporch is low enough.

    #15442

    furiouspaul
    Participant

    Yes I am trying to display 4:3 image (SNES and NES) on a 16:9 display. I am using a BenQ ZOWIE 27″ Console eSports Gaming LED 1080p HD Monitor, model# RL2755.

    I have tried all values of the H.backporch along with the X3 scale at 4:3 mode and 256×240 mode as well. When I keep sliding the image, there are blank bars on the sides of the screen where the image disappears into.

    Any other advice on this would be greatly appreciated. thanks.

    #15443

    Harrumph
    Participant

    Aha I see. You could try to move that edge by increasing H.Active. Although I notice now, that doesn’t actually work in Lx3 mode on my screen, although it does in Lx5. I guess that’s due to the differences that are going on “under the hood”, to achieve valid output formats.

    The only other option I can think of is that you have added horizontal mask, which then would cut the image too far in.

    #15444

    Harrumph
    Participant

    Or rather, it could be due to under the hood differences, but it could also be due to the scaling that the screen needs to perform on the Lx3 image (since you are on a 1080p native screen).
    Edit: NVM, I tested Lx3 output with 1:1 mapping on my screen, and H.Active increase did not move the image.

    #15447

    furiouspaul
    Participant

    Sounds like this needs a firmware fix eh?

    #15464

    Harrumph
    Participant

    Well I’m not sure tbh, the available backporch adjustment seems adequate enough for most cases.
    How does your screen handle x2, x4, x5 by the way, is it still off-center?

    #15466

    BonzoBits
    Participant

    Which console are you using? I know on some Saturn games I’m unable to see the entire picture as some of the graphics on the left and right are hidden behind the side bars.

    #15536

    Harrumph
    Participant

    Ok, I saw your webpage now with your streaming setup. I had not understood your original problem, that you actually want the image to appear at the left edge of your screen, not the centre. But to be honest, I don’t think the OSSC is really designed to be able to put your image anywhere on the screen. To get that kind of versatility (and have it work on all monitors), afaik a frame buffer is needed.

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