Export mp3 chapter markers into an Adobe-Audition compatible CSV

mp3chapters.py

import subprocess
import re
import csv
import sys

# Function to convert seconds to "MM:SS.sss" format
def format_time(seconds):
    minutes = int(seconds // 60)
    seconds %= 60
    return "{:02d}:{:06.3f}".format(minutes, seconds)

# Check if the correct arguments are provided
if len(sys.argv) != 3:
    print("Usage: python script.py <input.mp3> <output.csv>")
    sys.exit(1)

# Get the input and output file names from the command line arguments
input_file = sys.argv[1]
output_file = sys.argv[2]

# Run the ffmpeg command and get the output
output = subprocess.run(['ffmpeg', '-i', input_file], stderr=subprocess.PIPE, universal_newlines=True)

# Split the output into lines and strip leading and trailing whitespace
lines = [line.strip() for line in output.stderr.split('\n')]

# Open the CSV file for writing
with open(output_file, 'w', newline='') as file:
    writer = csv.writer(file, delimiter='\t')
    writer.writerow(["Name", "Start", "Duration", "Time Format", "Type", "Description"])

    # Loop through the lines
    for i in range(len(lines)):
        # If the line starts with "Chapter", it contains the start and end times
        if lines[i].startswith('Chapter'):
            # Extract the start and end times
            times_match = re.search('start (.*), end (.*)', lines[i])
            title_match = re.search('title           : (.*)', lines[i+2])

            if times_match and title_match:
                times = times_match.groups()
                title = title_match.group(1)

                # Convert the start time and duration to "MM:SS.sss" format
                start_time = format_time(float(times[0]))
                duration = format_time(float(times[1]) - float(times[0]))

                # Write the name, start time, duration, time format, type, and description to the CSV
                writer.writerow([title, start_time, duration, "decimal", "Cue", ""])