Attach .cube to movie file, using YouTube's hdr_metadata tool

attach-cube.sh

#!/bin/bash

# Check if both parameters have been provided
if [ $# -ne 2 ]; then
  echo "Usage: $0 <video_file> <cube_file>"
  exit 1
fi

# Check if mkvmerge is available in PATH
if ! command -v mkvmerge &> /dev/null; then
    echo "Error: mkvmerge is not available in PATH. Please add it to your PATH environment variable."
    echo "To add it, you can run:"
    echo "  export PATH=\"\$PATH:/path/to/mkvmerge\""
    exit 1
fi

# Get the directory path and file name of the input video file
input_dir=$(dirname "$1")
input_file=$(basename "$1")

# Get the base name of the video file
output_file="${input_file%.*}.mkv"

# Run the command
mkvmerge -o "${input_dir}/${output_file}" \
      --colour-matrix 0:9 \
      --colour-range 0:1 \
      --colour-transfer-characteristics 0:16 \
      --colour-primaries 0:9 \
      --max-content-light 0:1000 \
      --max-frame-light 0:300 \
      --max-luminance 0:1000 \
      --min-luminance 0:0.01 \
      --chromaticity-coordinates 0:0.68,0.32,0.265,0.690,0.15,0.06 \
      --white-colour-coordinates 0:0.3127,0.3290 \
      --attachment-mime-type application/x-cube \
      --attach-file "$2" \
      "$1"