python 录制系统声音 最近做项目遇到一个需求，需要录制系统的声音并且需要实时获取录制到的数据。
从网上搜索得到的结果很多都是通过pyaudio录制立体声混音设备来得到系统的声音，但是这个方法在我的电脑不适用。
经过多次尝试，发现soundcard库可以录制系统的声音，下面介绍具体的实现 确定录制设备 首先需要确定录制什么设备，通过
sc.all_microphones(include_loopback=True)
可以获取到所有的可录制设备，其中可以录制到系统输出声音的设备的 isloopback 属性为 True。
mics = sc.all_microphones(include_loopback=True)
loopback_devices = []
loopback_devices_name = []
for i in range(len(mics)):
if mics[i].isloopback is True:
loopback_devices.append(mics[i])
loopback_devices_name.append(mics[i].name)
选择合适的设备进行录制
device = loopback_devices[idx]
recorded_data = []
duration = 6
with device.recorder(samplerate, 1) as mic:
try:
start_time = time.time()
while time.time() - start_time < duration:
frames = mic.record(numframes=1024)
# 录制的结果为浮点数，转为字节，便于写入文件
recorded_data.append((frames * 32768).astype(np.int16).tobytes())
except KeyboardInterrupt:
print("\nRecording stopped.")
写入文件 使用wave库写入音频
with wave.open(filename, mode="wb") as wav_file:
wav_file.setnchannels(1)
wav_file.setsampwidth(2)
wav_file.setframerate(samplerate)
for i in range(len(recorded_data)):
wav_file.writeframes(recorded_data[i])
完整示例 一个完整的示例如下
import wave
import soundcard as sc
import numpy as np
import time
def record_and_save(device, filename, duration=10, samplerate=16000):
print(f"Starting stream recording from device: {device.name}...")
# 用于存储录制的数据
recorded_data = []
with device.recorder(samplerate, 1) as mic:
try:
start_time = time.time()
while time.time() - start_time < duration:
frames = mic.record(numframes=1024)
recorded_data.append((frames * 32768).astype(np.int16).tobytes())
except KeyboardInterrupt:
print("\nRecording stopped.")
# 保存为 WAV 文件
print(f"Saving recorded data to {filename}...")
with wave.open(filename, mode="wb") as wav_file:
wav_file.setnchannels(1)
wav_file.setsampwidth(2)
wav_file.setframerate(samplerate)
for i in range(len(recorded_data)):
wav_file.writeframes(recorded_data[i])
print(f"Recording saved to {filename}")
def main():
mics = sc.all_microphones(include_loopback=True)
loopback_devices = []
loopback_devices_name = []
for i in range(len(mics)):
if mics[i].isloopback is True:
loopback_devices.append(mics[i])
loopback_devices_name.append(mics[i].name)
if len(loopback_devices) == 0:
print("无可用的内录设备！
")
exit(0)
print(f"可用的内录设备有：")
for i in range(len(loopback_devices)):
print(f"{i}: {loopback_devices_name[i]}")
idx = input("请选择内录设备：")
try:
idx = int(idx)
except:
print("输入错误")
exit(0)
if idx < 0 or idx >= len(loopback_devices):
print("输入错误")
exit(0)
device = loopback_devices[idx]
record_and_save(device, filename="record.wav", duration=6)
if __name__ == "__main__":
main()