How to batch convert .wav to .mp3 with a script?

[DJ Warmonger]

I'm looking for a tool (preferably free) that would allow to convert a large number of .wav files to .mp3 and can be triggered by command line, or one-click script at most.

Could you help with any suggetsions?

[BertKoor]

lame.exe was always the best in class. You only need to figure out the CLI options and write a .bat / .cmd / .ps1 around it.

How's your folder structure: include subdirectories?
What about adding ID3 tags with artist, title & genre?

[whyterabbyt]

sox

[DJ Warmonger]

lame.exe was always the best in class. You only need to figure out the CLI options and write a .bat / .cmd / .ps1 around it.

Not much to say about that:

Code: Select all

lame -b 320 filename.wav filename.mp3

How's your folder structure: include subdirectories?
What about adding ID3 tags with artist, title & genre?

I've got another script for that

[BertKoor]

So, problem solved then?

[husker37]

Dbpoweramp Converter is what I use for this exact thing.

[DJ Warmonger]

It was more difficult than expected, but I wrote a Python script that runs lame.exe concurrently in multiple processes. Because 12 cores are better than one.

Warning: It deletes input .wavs afterwards.

Code: Select all

from asyncio import subprocess
import os
import subprocess
import multiprocessing
from multiprocessing.pool import ThreadPool

FOLDER = "G:\\Na przemiał"

# Find files

fileList = []
results = []

for name in os.listdir(FOLDER):
	if name.endswith('.wav'):
		fileList.append(name)

print("\nFound file names:\n\n" + '\n'.join(fileList))

def call_proc(name):
	""" This runs in a separate thread. """
	
	cmd = f"lame -b 320 \"{name}\" \"{name.replace('.wav', '.mp3')}\""

	p = subprocess.Popen(cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
	out, err = p.communicate()
	print(f"Finished conversion of {name}")
	return (out, err)


pool = ThreadPool(multiprocessing.cpu_count())

for name in fileList:
	results.append(pool.apply_async(call_proc, (name,)))

# Close the pool and wait for each running task to complete
pool.close()
pool.join()
for result in results:
	out, err = result.get()

for name in fileList:

	newName = name.replace('.wav', '.mp3')

	if (os.path.exists(newName)):
		#file has been converted properly
		print(f"Deleting {name}")
		os.remove(name)