Question

下面的代码我尝试在Raspberry Pi 3 Model B上运行它，它的内存容量有点大，我面对代码的问题是它有时运行：

from os import environ, path
import pyaudio
from pocketsphinx.pocketsphinx import *
from sphinxbase.sphinxbase import *

MODELDIR = "../../../model"
DATADIR = "../../../test/data"

config = Decoder.default_config()
config.set_string('-hmm', path.join(MODELDIR, 'en-us/en-us'))
config.set_string('-lm', path.join(MODELDIR, '3199.lm'))
config.set_string('-dict', path.join(MODELDIR, '3199.dic'))
config.set_string('-logfn', '/dev/null')
decoder = Decoder(config)

p = pyaudio.PyAudio()
stream = p.open(format=pyaudio.paInt16, channels=1, rate=16000, input=True, frames_per_buffer=1024)
stream.start_stream()

in_speech_bf = False
decoder.start_utt()
while True:
    buf = stream.read(1024)
    if buf:
        decoder.process_raw(buf, False, False)
        if decoder.get_in_speech() != in_speech_bf:
            in_speech_bf = decoder.get_in_speech()
            if not in_speech_bf:
                decoder.end_utt()
                result = decoder.hyp().hypstr

                print 'Result:', result
                if result == 'yes':
                      print 'Do whatever you want'

                decoder.start_utt()
    else:
        break
decoder.end_utt()

程序不断崩溃并抛出以下异常： OSError：[ - 9985] Errno设备不可用

Answer 1

首先尝试打开和关闭流。

p = pyaudio.PyAudio()
stream = p.open(format=pyaudio.paInt16, channels=1, rate=16000, input=True, frames_per_buffer=1024)
# stream.start_stream()
in_speech_bf = False
decoder.start_utt()
while True:
    if stream.is_stopped():
        stream.start_stream() 
    buf = stream.read(1024)
    if buf:
        stream.stop_stream()
        decoder.process_raw(buf, False, False)

如果您仍然遇到问题，请尝试使用~/.asoundrc

中的Alsa Plug插件

pcm.record {
    type plug;
    slave {
        pcm "hw:<CARD>,<DEVICE>"
    }
}

找出CAPTURE设备（用于录音的声卡）并记下CARD号码和DEVICE号码。在下面的例子中，两者都是0.替换上面插件中的CARD和DEVICE值。

> arecord -l

**** List of CAPTURE Hardware Devices ****
card 0: Devices [USB Device 2345:3x55], device 0: USB Audio [USB Audio]

现在插件看起来像

pcm.record {
    type plug;
    slave {
        pcm "hw:0,0"
    }
}

保存~/.asoundrc文件并重启RPi。现在使用以下python脚本找出新创建的设备index。{/ p>

pcm.record

它会输出INDEX（这里是9，但在你的情况下可能会有所不同）

import pyaudio
po = pyaudio.PyAudio()
for index in range(po.get_device_count()): 
    desc = po.get_device_info_by_index(index)
    if desc["name"] == "record":
        print "DEVICE: %s  INDEX:  %s  RATE:  %s " %  (desc["name"], index,  int(desc["defaultSampleRate"]))

现在稍微更改主脚本（在DEVICE: record INDEX: 9 RATE: 48000中插入input_device_index=9）

p.open()

多数，再次运行您的脚本，看看问题是否已解决。

如何使用Pyaudio python模块在Raspberry Pi中捕获音频而不会溢出？

1 个答案: