Pyaudio:将输入连接到输出时出错 [英] Pyaudio: Error when wiring input to output

问题描述

我正在Intel Edison板上尝试pyaudio，但由于内置测试失败.在我的设置下，单独录制和播放可以很好地工作，但是如果我尝试将输入连接到输出，则会出现错误.

文件"wire_full.py"，第33行，在 数据= stream.read(CHUNK)文件"/usr/lib/python2.7/site-packages/pyaudio.py"，第605行，处于读取状态 返回pa.read_stream(self._stream，num_frames)IOError:[Errno输入溢出] -9981

有人知道是什么问题吗?

下面是在pyaudio中连接输入到输出的示例代码:

""" 
PyAudio Example: Make a wire between input and output (i.e., record a 
few samples and play them back immediately). 


This is the full duplex version. 
"""  


import pyaudio  
import sys  


CHUNK = 1024  
WIDTH = 2  
CHANNELS = 2  
RATE = 44100  
RECORD_SECONDS = 5  


if sys.platform == 'darwin':  
    CHANNELS = 1  


p = pyaudio.PyAudio()  


stream = p.open(format=p.get_format_from_width(WIDTH),  
                channels=CHANNELS,  
                rate=RATE,  
                input=True,  
                output=True,  
                frames_per_buffer=CHUNK)  


print("* recording")  


for i in range(0, int(RATE / CHUNK * RECORD_SECONDS)):  
    data = stream.read(CHUNK)  
    stream.write(data, CHUNK)  


print("* done")  


stream.stop_stream()  
stream.close()  

p.terminate()

解决方案

我通过将CHUNK大小更改为512来解决了这一问题.偶尔仍然会遇到相同的错误，但至少在大多数情况下都有效.

如果有任何想法可以解决这个问题，或者我怎么可以完全消除该错误?

更新

好的，所以我用try ..包围了读/写代码.除了将CHUNK大小减小到512，现在它可以正常工作了，没有任何错误.如果我将1024用作CHUNK大小，将会丢失很多帧，并且音质也很差.

for i in range(0, int(RATE / CHUNK * RECORD_SECONDS)):  
    try:
        data = stream.read(CHUNK)  
        stream.write(data, CHUNK)  
    except:
        pass

感谢@Meta提供线索！ :)

I'm trying out pyaudio on Intel Edison board, but it fails with the build-in tests. Recording and playing alone works fine with my setting, but if I'm trying to wire input to output, it gives an error.

File "wire_full.py", line 33, in data = stream.read(CHUNK) File "/usr/lib/python2.7/site-packages/pyaudio.py", line 605, in read return pa.read_stream(self._stream, num_frames) IOError: [Errno Input overflowed] -9981

Does anybody understand what's the problem?

Below is the example code for wiring input to output in pyaudio:

""" 
PyAudio Example: Make a wire between input and output (i.e., record a 
few samples and play them back immediately). 


This is the full duplex version. 
"""  


import pyaudio  
import sys  


CHUNK = 1024  
WIDTH = 2  
CHANNELS = 2  
RATE = 44100  
RECORD_SECONDS = 5  


if sys.platform == 'darwin':  
    CHANNELS = 1  


p = pyaudio.PyAudio()  


stream = p.open(format=p.get_format_from_width(WIDTH),  
                channels=CHANNELS,  
                rate=RATE,  
                input=True,  
                output=True,  
                frames_per_buffer=CHUNK)  


print("* recording")  


for i in range(0, int(RATE / CHUNK * RECORD_SECONDS)):  
    data = stream.read(CHUNK)  
    stream.write(data, CHUNK)  


print("* done")  


stream.stop_stream()  
stream.close()  

p.terminate()

解决方案

I solved it by changing the CHUNK size to 512. Still having the same error once in a while, but at least it works most of the time.

If there's any idea why this works, or how I may remove the error totally?

Update

OK, so I surrounded the read/write code with try.. except, also lowering the CHUNK size to 512, now it's working without any errors. If I use 1024 as the CHUNK size, a lot frames will be lost and the sound quality is terrible.

for i in range(0, int(RATE / CHUNK * RECORD_SECONDS)):  
    try:
        data = stream.read(CHUNK)  
        stream.write(data, CHUNK)  
    except:
        pass

Thanks @Meta for the clue! :)

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