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#!/usr/bin/env python3
import os
rates = [44100, 48000]
channels = [1, 2]
duration = "0.5"
frequency = "1000"
volume = "-3dB"
name = "half-a-second"
formats = {
"aac-in-adts": [{"codec": "aac", "extension": "aac"}],
"mp3": [{"codec": "libmp3lame", "extension": "mp3"}],
"mp4": [
{
"codec": "libopus",
"extension": "mp4",
},
{"codec": "aac", "extension": "mp4"},
],
"ogg": [
{"codec": "libvorbis", "extension": "ogg"},
{"codec": "libopus", "extension": "opus"},
],
"flac": [
{"codec": "flac", "extension": "flac"},
],
"webm": [
{"codec": "libopus", "extension": "webm"},
{"codec": "libvorbis", "extension": "webm"},
],
}
for rate in rates:
for channel_count in channels:
wav_filename = "{}-{}ch-{}.wav".format(name, channel_count, rate)
wav_command = "sox -V -r {} -n -b 16 -c {} {} synth {} sin {} vol {}".format(
rate, channel_count, wav_filename, duration, frequency, volume
)
print(wav_command)
os.system(wav_command)
for container, codecs in formats.items():
for codec in codecs:
encoded_filename = "{}-{}ch-{}-{}.{}".format(
name, channel_count, rate, codec["codec"], codec["extension"]
)
print(encoded_filename)
encoded_command = "ffmpeg -y -i {} -acodec {} {}".format(
wav_filename, codec["codec"], encoded_filename
)
print(encoded_command)
os.system(encoded_command)