Super Metroid No Cutscenes Lua

--[[
start this script at the same time as you playback the movie and dump the movie.
when finished, be sure to hit "stop" in the lua script window to ensure that the created file gets flushed

you'll have an "skip.avs" that will contain a set of Trim() commands that will create a cutsceneless encode
]]

local pigf = -1
local skipping = true
local startframe = 0


local outfile = io.open ("skip.avs", "w")

local firstsegment = true

-- remember to hit "stop" to ensure that the io file gets cleaned up correctly!

while true do
   local istop = memory.readbyte(0x000009)
   local dstop = memory.readbyte(0x0005F5)
   local estop = memory.readbyte(0x000E18)
  if istop+dstop+estop == 0 or istop+dstop+estop == 0x6F then -- display this frame
    if skipping then -- end skipping, so record start of new unskipped segment
      startframe = emu.framecount()
      skipping = false
    end
  else -- skip this frame
    if not skipping then -- start skipping, so record finish of last unskipped segment
      if emu.framecount () > 1 then -- avoid 1 frame edge case that causes avs problems
        if firstsegment then
          outfile:write (string.format ("c0 = last\n       c0.Trim (%i, %i)\n", startframe, emu.framecount () - 1))
          firstsegment = false
        else
          outfile:write (string.format ("last + c0.Trim (%i, %i)\n", startframe, emu.framecount () - 1))
        end
        skipping = true
      end
    end
  end
  emu.frameadvance()
end