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RealStickman 2022-10-03 19:58:45 +02:00
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main.py Executable file
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#!/usr/bin/env python3
# ffmpeg wrapper
from os import sched_get_priority_max
import ffmpy
# argument parsing
import argparse
# executing some commands
import subprocess
"""
parser = argparse.ArgumentParser(description="")
# Input file
parser.add_argument("-i", "--input-file", required=True, type=str, help="Input file")
args = parser.parse_args()
inputfile = args.input_file
"""
"""
ffmpeg -y -i FalKKonE\ -\ 01\ Aria\ \(From\ \"Berserk:\ The\ Golden\ Age\ Arc\"\).flac -pass 1 -filter:a loudnorm=print_format=json -f flac /dev/null
ffmpeg -i FalKKonE\ -\ 01\ Aria\ \(From\ \"Berserk:\ The\ Golden\ Age\ Arc\"\).flac -pass 2 -filter:a loudnorm=I=-30.0:linear=true:measured_I=-4.52:measured_LRA=1.90:measured_thresh=-14.64 -c:a libopus -b:a 320k test441.opus
ffmpeg -i $FILE -c:v libx264 -b:v 4000k -pass 2 -filter:a loudnorm=linear=true:measured_I=$input_i:measured_LRA=$input_lra:measured_tp=$input_tp:measured_thresh=$input_thresh -c:a aac -b:a 256k $FILE.mkv
"""
# FIXME
inputfile = (
'/home/marc/Downloads/FalKKonE - 01 Aria (From "Berserk: The Golden Age Arc").flac'
)
inputfile = "/home/marc/Downloads/test441.opus"
def get_format(inputfile):
# get codec format
# https://stackoverflow.com/a/29610897
# this shows the codecs of all audio streams present in the file, which shouldn't matter unless you have more than one stream
ff = ffmpy.FFprobe(
inputs={inputfile: None},
global_options=(
"-v",
"quiet",
"-select_streams a",
"-show_entries stream=codec_name",
"-of default=noprint_wrappers=1:nokey=1",
),
)
# print(ff.cmd)
proc = subprocess.Popen(ff.cmd, shell=True, stdout=subprocess.PIPE)
# NOTE read output from previous command
# rstrip: remove trailing newline
# decode: convert from binary string to normal string
format: str = (
proc.stdout.read() # pyright: ignore[reportOptionalMemberAccess]
.rstrip()
.decode("utf8")
)
# print(format)
return format
def loudness_info(inputfile):
# get format from file
# inputformat = get_format(inputfile)
# NOTE format is actually unnecessary here
ff = ffmpy.FFmpeg(
inputs={inputfile: None},
outputs={"/dev/null": "-pass 1 -filter:a loudnorm=print_format=json -f null"},
global_options=("-y"),
)
print(ff.cmd)
def convert():
# ff = ffmpy.FFmpeg()
pass
if __name__ == "__main__":
loudness_info(inputfile)

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notes.md Normal file
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# Normalize my music with ffmpeg and python
[Loudnorm Filter](https://ffmpeg.org/ffmpeg-filters.html#loudnorm)
[Filtering Guide](https://trac.ffmpeg.org/wiki/FilteringGuide)
[Two pass loudnorm](https://superuser.com/a/1312885)
`ffmpeg -y -i FalKKonE\ -\ 01\ Aria\ \(From\ \"Berserk:\ The\ Golden\ Age\ Arc\"\).flac -pass 1 -filter:a loudnorm=print_format=json -f flac /dev/null`
`ffmpeg -i FalKKonE\ -\ 01\ Aria\ \(From\ \"Berserk:\ The\ Golden\ Age\ Arc\"\).flac -pass 2 -filter:a loudnorm=I=-30.0:linear=true:measured_I=-4.52:measured_LRA=1.90:measured_thresh=-14.64 -c:a libopus -b:a 320k test441.opus`