Convert an audio file to a video file, ready to upload on YouTube. WAVE, AIFF and FLAC to MP4 using a loop of the cover art in H.264 and audio in ALAC

convert.sh

#!/bin/bash

SUPPORTED_FILES=('.wav' '.wave' '.aif' '.aiff' '.flac')

INPUT_PATH=$1
BASE_PATH=${INPUT_PATH##*/}
FILE_EXTENSION=
FILE_NAME=

setup_file() {
    FILE_EXTENSION=$1
    FILE_NAME=${BASE_PATH%"$FILE_EXTENSION"}
}

case "$INPUT_PATH" in
    *.wave)
        setup_file .wave
        ;;
    *.wav)
        setup_file .wav
        ;;
    *.aiff)
        setup_file .aiff
        ;;
    *.aif)
        setup_file .aif
        ;;
    *.flac)
        setup_file .flac
        ;;
    *)
        echo "Invalid input file format. File should be one of:" ${SUPPORTED_FILES[@]}
        exit 1
        ;;
esac

# Create the directory
mkdir -p "$FILE_NAME"

# Get the cover
ffmpeg -i "$INPUT_PATH" -an -vcodec copy "$FILE_NAME/cover.jpg" -y

# Extract metadata
# ffmpeg -i "$INPUT_PATH" -f ffmetadata "$FILE_NAME/metadata.txt" -y
mutagen-inspect "$INPUT_PATH" > "$FILE_NAME/metadata.txt"

# Create the video
ffmpeg -loop 1 -framerate 1 -i "$FILE_NAME/cover.jpg" -i "$INPUT_PATH" -c:v libx264 -preset veryslow -tune stillimage -crf 0 -r 10 -vf "scale=-1:1080:flags=lanczos" -c:a alac -movflags +faststart -shortest -fflags +shortest -max_interleave_delta 100M "$FILE_NAME/$FILE_NAME.mp4" -y

# Move the original file to the directory
mv "$INPUT_PATH" "$FILE_NAME/$FILE_NAME$FILE_EXTENSION"