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Mupen Utilities User Guide

How to load a M64

  • Start Mupen Utilities
  • Click on the "M64" radio button
  • Right beside it, press the button labeled "Browse M64"
  • Navigate and select your M64 file

The program will immediately start loading the movie file after selection. Wait for the loading process to finish and the dialog to expand. If a warning appears or any text turns red, your M64 might be corrupted. Use the M64 diagnostic tool to check if your movie is corrupted.

Example Image

How to edit a M64

  • With a M64 loaded, turn on Read-write mode by unchecking "Read-only"
  • You can edit buttons by either clicking on TAS Studio cells or the checkboxes.
  • You can edit joystick by either moving the joystick while holding down leftclick or by manually typing joystick coordinates into the X and Y fields and pressing enter.

On how to save your edited M64, visit How to save a M64

How to save a M64

  • With a M64 loaded, click either the "Save" or "Save As" buttons at the bottom.

How to view statistics about your M64

  • With a M64 loaded, click on the "More" button inside the "Input" group box.

How to replace (hex) two M64s together

  • At the top, click on the "Replacement" radiobutton and then on the button named "Replacement" next to it.
  • Select your Source and Target movies by clicking the respective "Browse" button. The output movie is optional; leave it empty for the output to be placed in the same folder with the program or select a path for it to be saved there.
  • Select the range of frames from which you want to replace (e.g from frame 4 to frame 9)
  • Click "Go" to start the process.

From source - The begin of the region in the source m64.

To source - the end of the region in the source m64.

From target - The begin of the region in the second m64.

To target - The end of the region in the second m64.

Upon pressing 'Go', the 1st m64's region (from source -> to source) will get copied into the 2nd m64's region.

Troubleshooting replacement

"Identical Paths" - The source and target movie are the same

"Invalid Path" - The source or target path/file does not exist

"Target movie is shorter than source movie" - The target movie is not big enough to fit the source movie

"Integer parsing error" - The text in the "From frame" or "To frame" textboxes isn't a number

"Invalid from/to/base value" is a vague error and can mean

  • The difference of to/src target and from/src target is less than one.
  • From/to src/trg is too big
  • From/to src/trg is too small

How to find the first button/joystick value in a movie

Do you want to find the first frame at which a specific button or joystick combination is held?

  • With a M64 loaded, open the Input Analysis dialog by clicking on "More" and then on "Input Analysis"
  • Switch to the tab "Finder"
  • Choose your button/joystick
  • Press "Go"

Rundown of "More" context menu

This menu changes with each update, but I'll try to keep this section relevant.

  • Simple Mode: toggles between a simple view with less controls and the full view

  • Input Analysis: opens the Input Analysis dialog

  • Movie Diagnostic: opens the Movie Diagnostic dialog and automatically performs all checks

  • Expert Tools: opens the Expert Tools dialog where you can view and edit movie data byte by byte

  • Get Input: shows a messagebox explaining how to understand a input data sample and shows you the data in a nice format

  • Themes: opens a dropdown where you can select themes

  • Antialiased Joystick: enables or disables antialiasing on the joystick drawing

  • Aggressive Override: when enabled, calls input-related functions more often and prevents weird edge cases from happening. It is VERY recommended you keep this on

  • Joystick Keyboard: when enabled, allows you to control the joystick using WASD, arrow keys

  • Generate Telemetry Data: generates a big file with many informations about your Mupen Utilities session and prompts you to send it to me. I appreciate this :)

  • Dump Movie: Dumps all movie input data to a file

  • Load CRC database: Loads CRC database from crc.txt located in the same folder as the executable

Acceptable format: crc 12345678. The text after crc should be a hex string

You can find the recommended resource here: https://github.com/libretro/libretro-database/blob/master/metadat/no-intro/Nintendo%20-%20Nintendo%2064.dat

  • Debug: Crash - Throws a exception and should cause the Mupen Utilities exception window to pop up