import glob
import sys
import subprocess

letter_year = sys.argv[1]
wav_path = sys.argv[2]

files = glob.glob(f"{wav_path}/*.wav")
files.sort()

with open(f"./inputs-{letter_year}.txt", "x") as f:
    for file in files:
        f.write(f"file {file}'\n")
    f.flush()

subprocess.run([
    "ffmpeg",
    "-f", "concat",
    "-safe", "0",
    "-i", f"inputs-{letter_year}.txt",
    "-c", "copy", f"output-{letter_year}.wav",
    ])