Piano Roll
The Piano Roll is the flagship feature of Mupen64 1.1.9 and allows seeking through movies visually and editing inputs prior to the current frame.
Note
The Piano Roll isn't optimized for multi-controller movies.
Note
Editing functionality is only available if the seek savestate interval is non-0.
The Piano Roll is divided into 3 main sections:
The list is comprised of columns representing the playhead, the frame index, controller joystick and buttons, and rows containing the input data for a specific frame.
The history listbox contains snapshots of the piano roll's state at certain points in time. Such "states" are comprised of the input buffer, the selection, and the selected frame.
Users can't remove items from the history stack, as it's managed automatically. The maximum size of the stack is 100 by default, but can be changed in the settings.
Selecting an item in the history listbox will restore the accompanying piano roll state.
Utilizing Undo/Redo changes the selection in the history listbox.