Do you make music (without lyrics) and want a simple method for making visualizer videos? Use this to make 4k spectrograph videos from your MP3 files!

mp3ToVideo.sh

#!/bin/bash

# Check if the required argument is provided
if [ "$#" -ne 1 ]; then
    echo "Usage: $0 <input_directory>"
    exit 1
fi

# Input directory containing MP3 files
INPUT_DIR="$1"

# Output directory
OUTPUT_DIR="$INPUT_DIR/output"

# Create the output directory if it doesn't exist
mkdir -p "$OUTPUT_DIR"

# Iterate through all MP3 files in the input directory
for INPUT_MP3 in "$INPUT_DIR"/*.mp3; do
    # Extract the filename without the extension
    FILENAME=$(basename "$INPUT_MP3" .mp3)
    
    # Formatted title
    TITLE="Frankenmint - $FILENAME"
    
    # Output MP4 file
    OUTPUT_MP4="$OUTPUT_DIR/${FILENAME}.mp4"
    
    # Generate the video with the spectrogram and add the title
    ffmpeg -i "$INPUT_MP3" -filter_complex "[0:a]showspectrum=s=3840x2160:legend=disabled:color=rainbow,drawtext=fontfile=/usr/share/fonts/truetype/dejavu/DejaVuSans-Bold.ttf:text='$TITLE':fontcolor=white:fontsize=100:x=(w-text_w)/2:y=(h-text_h)/10,format=yuv420p[v]" -map "[v]" -map 0:a -c:v libx264 -preset slow -crf 18 -c:a copy -shortest "$OUTPUT_MP4"
    
    echo "Video created: $OUTPUT_MP4"
done