Update to FFmpeg@6

[xaviliz]

Update the homebrew formula to FFmpeg-v6

PROBLEM

The current Essentia Homebrew formula fails to build Python bindings when six is not installed, and older FFmpeg versions prevent installing the latest Essentia version.

Users encounter ModuleNotFoundError: No module named 'essentia' when attempting to import the Python bindings.

SOLUTION

• Ensure Python dependencies numpy and six are installed before building Essentia Python bindings using a virtual environment.
• Update the formula to explicitly depend on ffmpeg@6 to allow building the current Essentia version.
• Fix the .pth file creation so Python automatically discovers the installed bindings without overwriting existing files.
• Keep optional dependencies for Gaia and TensorFlow configurable.

PREREQUISITES

• Homebrew ≥ 4.0 (tested on macOS M4 with ARM64 machine)
• Python 3.11 (formula installs python@3.11 if missing)
• Xcode Command Line Tools (for compiling C++ dependencies)

No need to pre-install numpy or six manually — handled in the formula

CLOSES

• Closes issues related to:

  • Python bindings failing due to missing six
  • Build failures with older FFmpeg versions via homebrew

• Closes
  * brew install: Error: Failed to download resource "essentia" #37
  * Compatibility with other Python versions #34
  * cannot install essentia on MacOS M1 #32
  * cannot install essentia on MacOs #30

HOW TO REPRODUCE

Attempt to install Essentia with the previous formula:

 brew install --build-from-source ./essentia.rb

Observe errors:

Missing six module

Python ModuleNotFoundError for essentia

HOW TO TEST

After updating the formula in the homebrew-essentia repository:

Option 1: From the local formula

Navigate to the directory containing the updated formula

brew install --build-from-source ./essentia.rb

Test Python bindings

python3.11 -c "import essentia.standard as estd; import essentia.streaming as estr; estd.MusicExtractor()('/System/Library/Sounds/Glass.aiff')"

Option 2: From the GitHub tap

Add the tap

brew tap xavierlizarraga/homebrew-essentia https://github.com/xavierlizarraga/homebrew-essentia.git

Install Essentia from the tap

brew install --build-from-source homebrew-essentia/essentia

Test Python bindings

python3.11 -c "import essentia.standard as estd; import essentia.streaming as estr; estd.MusicExtractor()('/System/Library/Sounds/Glass.aiff')"

Both methods ensure Essentia is compiled with FFmpeg-v6, and Python dependencies (numpy and six) are installed in a virtual environment so that the Python bindings work out of the box.