To the best of my knowledge, this isn't currently possible. However, you can replicate the behavior through Lua scripts pretty easily.
Language: lua
use_from_movie = {'B', 'Left', 'Right', 'Up', 'Down'}
while true do
old_inputs = movie.getinput(emu.framecount())
filtered_inputs = {}
for k, button in pairs(use_from_movie) do
filtered_inputs[button] = old_inputs[button]
end
joypad.set(filtered_inputs)
emu.frameadvance()
end
use_from_movie is a table of inputs I want to be taken from the movie. In my example code, I choose for directional inputs and the 'B' button to be taken from the movie. That means the emulator will essentially ignore any of my inputs that are directional keys or the 'B' button, and always press those when the original movie had them pressed.
You can save that script to a file with a
.lua file extension and drag it into BizHawk. That first line of code can be modified to your specific situation. You can see a list of buttons for your current emulated system by entering
joypad.get() into the Lua console.
