问题描述
我像这样录制pyaudio
的声音
p = pyaudio.PyAudio()
hostAPICount = p.get_host_api_count()
print("Host API Count = " + str(hostAPICount))
for i in range(p.get_device_count()):
print(p.get_device_info_by_index(i))
# check the device.
# 0 -> microphone 1-> headphone
DEVICE_INDEX = 0 #or 1
CHUNK = 1024
FORMAT = pyaudio.paInt16 # 16bit
CHANNELS = 1
RATE = 48000 # sampling frequency [Hz]
time_ = 5 # record time [s]
output_path = "./sample.wav"
stream = p.open(format=FORMAT,channels=CHANNELS,rate=RATE,input=True,input_device_index = DEVICE_INDEX,frames_per_buffer=CHUNK)
print("recording ...")
frames = []
for i in range(0,int(RATE / CHUNK * time_)):
data = stream.read(CHUNK)
frames.append(data)
print("done.")
stream.stop_stream()
stream.close()
p.terminate()
wf = wave.open(output_path,'wb')
wf.setnchannels(CHANNELS)
wf.setsampwidth(p.get_sample_size(FORMAT))
wf.setframerate(RATE)
wf.writeframes(b''.join(frames))
wf.close()
它适用于Microphone
但是我想录制在我的电脑上播放的声音。(合成器应用程序输出它在 MacOX 上使用 CoreAudio)
所以我改了设备号
DEVICE_INDEX = 0
-> DEVICE_INDEX = 1
但是出现这个错误信息
OSError: [Errno -9998] Invalid number of channels
也改了channel
但是没用,出现同样的信息
CHANNELS = 1
-> CHANNELS = 2
如何录制本地应用播放的音频?
有可能吗?
解决方法
我不久前遇到了这个问题,老实说无法通过编码解决它,而是通过使用 https://vb-audio.com/Cable/ 将扬声器声音重定向到输入。你只需要通过我之前做的这个小检查找到正确的 DEVICE_INDEX
。 (我觉得输入的名字还是一样的"CABLE Output (VB-Audio Virtual "
)
import pyaudio
p = pyaudio.PyAudio()
for i in range(p.get_device_count()):
if p.get_device_info_by_index(i)["name"] == "CABLE Output (VB-Audio Virtual ":
print(p.get_device_info_by_index(i)["index"])
p.terminate()
input("Click to finish")