Python如何播放还存在StringIO中的MP3?

问题描述

我尝试利用百度语音云API来实现一个包含TTS的桌面服务。已经成功获取返回MP3，并缓存在cStringIO中，但是不知道如何播放。代码播放抛出错误。

参考了http://guzalexander.com/2012/... 中提到的pywave/pyaudio/pyglet等方法。

代码如下：

#!/usr/bin/env python#encoding=utf-8 #import wave import pyaudioimport pygletimport urllib, urllib2, pycurl import base64 import json import cStringIOimport 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)

抛出错误如下：

Traceback (most recent call last): File 'C:BOM_Plannersourcesoldering_assistant_mvp.py', line 87, in <module> get_audio(token) File 'C:BOM_Plannersourcesoldering_assistant_mvp.py', line 79, in get_audio song = pyglet.media.load(buf) File 'C:Python27libsite-packagespygletmedia__init__.py', line 1429, in load source = get_source_loader().load(filename, file) File 'C:Python27libsite-packagespygletmedia__init__.py', line 1410, in load return riff.WaveSource(filename, file) File 'C:Python27libsite-packagespygletmediariff.py', line 185, in __init__ file = open(filename, ’rb’)TypeError: coercing to Unicode: need string or buffer, cStringIO.StringO found

问题解答

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...

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。