Issues with FFmpeg (and Movie Maker) - need chmod and the binary is the wrong CPU type

Most appropriate sub-area of Processing 4?

Utilities

Processing version

4.4.4

Operating system

MacOS 11.7.10 (Big Sur)

Steps to reproduce this

1.Install 'Movie Maker II' via Tools > Manage Tools.
2.Run Movie Maker.
3. Movie Maker gives the error 'Creating the QuickTime movie failed. Cannot run program "... frmpeg": error=13, Permission denied'
4. Use 'ls' in Terminal to view ffmpeg's permissions. They are '-rw-r--r--'.
5. Use 'chmod' in Terminal to change ffmpeg's permissions to '-rwxr--r-'.
6. Run Movie Maker again.
7. Movie Maker gives the error 'Creating the QuickTime movie failed. Cannot run program "... frmpeg": error=86, bad CPU type in executable.'
8. If I download the 'static FFmpeg binary for macOS 64-bit Intel' from https://evermeet.cx/ffmpeg/ and replace the existing 'ffmpeg', Movie Maker works okay.

snippet

Additional context

Thanks!

Would you like to work on the issue?

No

Comienza reproduciendo la instalación de Movie Maker II y la creación de una película en macOS 11.7.10; después, inspecciona los permisos y la arquitectura de CPU del ffmpeg instalado. Se considera completado cuando el ejecutable incluido puede ejecutarse sin hacer chmod manualmente ni reemplazarlo, y Movie Maker crea correctamente una película QuickTime.