如何用Python边下载边播放URL音频（不使用python-vlc）

以下几个库可以实现流式音频播放：

1. pydub + simpleaudio #

pydub支持音频流的分段处理，结合simpleaudio实现轻量播放，先安装依赖：

pip install pydub simpleaudio requests

示例代码：

import requests
from pydub import AudioSegment
from pydub.playback import play
import io

def stream_audio(url):
    buffer = io.BytesIO()
    chunk_size = 1024 * 10  # 调大缓冲块减少卡顿
    with requests.get(url, stream=True) as r:
        for chunk in r.iter_content(chunk_size=chunk_size):
            if chunk:
                buffer.write(chunk)
                buffer.seek(0)
                try:
                    # 尝试解码当前缓冲的音频
                    audio = AudioSegment.from_file(buffer, format="mp3")
                    play(audio)
                    # 保留缓冲中未播放的剩余数据
                    remaining = buffer.getbuffer()[buffer.tell():]
                    buffer = io.BytesIO(remaining)
                except:
                    # 缓冲数据不足时跳过，继续积累
                    pass

if __name__ == "__main__":
    stream_audio("你的音频URL")

2. sounddevice + soundfile #

这两个库专注于音频流处理，支持多种格式（MP3需额外安装libsndfile的MP3解码支持），安装命令：

pip install sounddevice soundfile requests

示例代码：

import requests
import sounddevice as sd
import soundfile as sf
import io

def stream_audio(url):
    buffer = io.BytesIO()
    with requests.get(url, stream=True) as r:
        for chunk in r.iter_content(chunk_size=4096):
            if chunk:
                buffer.write(chunk)
                buffer.seek(0)
                try:
                    data, samplerate = sf.read(buffer, dtype='float32')
                    sd.play(data, samplerate)
                    sd.wait()
                    # 保留剩余缓冲数据
                    remaining = buffer.getbuffer()[buffer.tell():]
                    buffer = io.BytesIO(remaining)
                except:
                    pass

if __name__ == "__main__":
    stream_audio("你的音频URL")

3. 修正你的pygame代码 #

你之前的代码问题在于每次循环都重新初始化mixer、覆盖文件，而MP3需要完整的帧才能解码。修改为积累足够缓冲后再播放：

import requests
from pygame import mixer
import os

def stream_remote_audio(url):
    mixer.init()
    temp_file = "temp.mp3"
    chunk_size = 1024 * 32  # 增大缓冲块，确保能解码完整帧
    with open(temp_file, "wb") as f, requests.get(url, stream=True) as r:
        for chunk in r.iter_content(chunk_size=chunk_size):
            if chunk:
                f.write(chunk)
                try:
                    mixer.music.load(temp_file)
                    mixer.music.play()
                    # 等待当前缓冲播放完毕再继续下载
                    while mixer.music.get_busy():
                        pass
                except:
                    # 缓冲不足时跳过，继续积累数据
                    pass
    os.remove(temp_file)

if __name__ == "__main__":
    audio_url = "你的音频URL"
    stream_remote_audio(audio_url)

内容的提问来源于stack exchange，提问作者mrithul e