FCEUX script to automatically capture screenshots from Nintendo (nes) roms

screenshot.lua

-- Download https://fceux.com/web/download.html
-- FCEUX 2.6.6 Qt/SDL win64 Binary
-- Usage:
-- .\qfceux.exe 1942.nes --loadlua ../luascripts/capture.lua

local frame = 0
local count = 0

while count <= 3 do
    frame = frame + 1

    -- Tap Start repeatedly for the first ~5 seconds
    if frame < 300 and frame % 20 == 0 then
        joypad.set(1, { start = true })
    else
        joypad.set(1, { start = false })
    end

    -- Screenshot logic
    if frame % 240 == 0 then
        local filename = string.format("C:/Users/<YOUR_USER>/fceux/snaps/screenshot_%05d.png", frame)
        gui.savescreenshotas(filename)
        emu.print("Saved: ", filename)
        count = count + 1
    end

    emu.frameadvance()
end

os.exit()