Wie spiele ich MP3-Dateien in StringIO mit Python ab?

Question

Ich versuche, die Baidu Voice Cloud API zu verwenden, um einen Desktop-Dienst einschließlich TTS zu implementieren. MP3 wurde erfolgreich abgerufen und in cStringIO zwischengespeichert, aber ich weiß nicht, wie ich es abspielen soll. Die Codewiedergabe löst einen Fehler aus.

Beziehen Sie sich auf pywave/pyaudio/pyglet und andere Methoden, die unter http://guzalexander.com/2012/... erwähnt werden.

Der Code lautet wie folgt:

---

#!/usr/bin/env python
#encoding=utf-8  
  
#import wave  
import pyaudio
import pyglet
import urllib, urllib2, pycurl  
import base64  
import json  
import cStringIO
import binascii

## get access token by api key & secret key  
  
def get_token():
    apiKey = "xxxxxxxxxx"  
    secretKey = "yyyyyyyyyyyyyyyyyyyyy"
    auth_url = "https://openapi.baidu.com/oauth/2.0/token?grant_type=client_credentials&client_id=" + apiKey + "&client_secret=" + secretKey;  
  
    res = urllib2.urlopen(auth_url)  
    json_data = res.read()  
    return json.loads(json_data)['access_token']  
  
def dump_res(buf):  
    #print buf  
    pass
  
  
## post audio to server  
def use_cloud(token):  
    fp = wave.open('vad_0.wav', 'rb')  
    nf = fp.getnframes()  
    f_len = nf * 2  
    audio_data = fp.readframes(nf)  
      
    cuid = "xxxxxxxxxx" #my xiaomi phone MAC  
    srv_url = 'http://vop.baidu.com/server_api' + '?cuid=' + cuid + '&token=' + token  
    http_header = [  
    'Content-Type: audio/pcm; rate=8000',  
    'Content-Length: %d' % f_len  
    ]  
      
    c = pycurl.Curl()  
    c.setopt(pycurl.URL, str(srv_url)) #curl doesn't support unicode  
    #c.setopt(c.RETURNTRANSFER, 1)  
    c.setopt(c.HTTPHEADER, http_header)   #must be list, not dict  
    c.setopt(c.POST, 1)  
    c.setopt(c.CONNECTTIMEOUT, 30)  
    c.setopt(c.TIMEOUT, 30)  
    c.setopt(c.WRITEFUNCTION, dump_res)  
    c.setopt(c.POSTFIELDS, audio_data)  
    c.setopt(c.POSTFIELDSIZE, f_len)  
    c.perform() #pycurl.perform() has no return val  
    

def get_audio(token):
    cuid = "00030DAF5784"   # MAC address
    text = "从前有座山，山上有个庙，庙里有个老和尚和小和尚，老和尚对小和尚说："
    #baidu_url = "http://tsn.baidu.com/text2audio?tex=" + urllib.urlencode(text) + "&lan=zh&cuid=" + cuid + "&ctp=1&tok=" + token
    baidu_url = "http://tsn.baidu.com/text2audio?tex=" + urllib.quote(text) + "&lan=zh&cuid=" + cuid + "&ctp=1&tok=" + token
    
    
    print("URL:\t{0}".format(baidu_url))
    buf = cStringIO.StringIO()

    c = pycurl.Curl()  
    c.setopt(c.URL, str(baidu_url)) #curl doesn't support unicode  
    #c.setopt(c.HTTPHEADER, http_header)   #must be list, not dict  
    #c.setopt(c.GET, 1)  
    c.setopt(c.WRITEFUNCTION, buf.write)
    c.setopt(c.CONNECTTIMEOUT, 30)  
    c.setopt(c.TIMEOUT, 30)  
    c.setopt(c.WRITEFUNCTION, dump_res)  
    c.perform() #pycurl.perform() has no return val  
    #print "type:\t{0}".format(c.CONTENT_TYPE)
    print(c.getinfo(c.CONTENT_TYPE))
    #print buf.getvalue()
    song = pyglet.media.load(buf)
    song.play()
    buf.close()
    
if __name__ == "__main__":  
    token = get_token()  
    print("token:\t{0}".format(token))
    #use_cloud(token)  
    get_audio(token)

Der ausgegebene Fehler lautet wie folgt:

Traceback (most recent call last):
  File "C:\BOM_Planner\source\soldering_assistant_mvp.py", line 87, in <module>
    get_audio(token)
  File "C:\BOM_Planner\source\soldering_assistant_mvp.py", line 79, in get_audio
    song = pyglet.media.load(buf)
  File "C:\Python27\lib\site-packages\pyglet\media\__init__.py", line 1429, in load
    source = get_source_loader().load(filename, file)
  File "C:\Python27\lib\site-packages\pyglet\media\__init__.py", line 1410, in load
    return riff.WaveSource(filename, file)
  File "C:\Python27\lib\site-packages\pyglet\media\riff.py", line 185, in __init__
    file = open(filename, 'rb')
TypeError: coercing to Unicode: need string or buffer, cStringIO.StringO found

Answer 1

你写的Python3就推荐pygame，可以用pygame.mixen.music来播放本地mp3文件。
当时我也找了很多都没有成功，最后用pygame播放的。

这是我写的一个例子。可以看看，我是把网络音乐保存到本地mp3文件再播放的，readme里面有相关信息。
https://github.com/kompasim/p...

Answer 2

如果是Linux环境下解决方案就比较多了,如果要实现跨平台建议用pygame。