Bagaimanakah Python boleh memainkan MP3 yang masih dalam StringIO?

Saya cuba menggunakan Baidu Voice Cloud API untuk melaksanakan perkhidmatan desktop termasuk TTS. MP3 telah berjaya diambil dan dicache dalam cStringIO, tetapi saya tidak tahu cara memainkannya. Main balik kod menimbulkan ralat.

Rujuk kepada pywave/pyaudio/pyglet dan kaedah lain yang disebut dalam http://guzalexander.com/2012/....

Kod adalah seperti berikut:

#!/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)

Ralat yang dilemparkan adalah seperti berikut:

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

过去多啦不再A梦2746 hari yang lalu961

Bagaimanakah Python boleh memainkan MP3 yang masih dalam StringIO?

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