python 获取ffmpeg里可以推送的音视频设备名称

先上代码：

import re

import subprocess




cmd = ['ffmpeg', '-list_devices','true', '-f','dshow','-i','dummy']

device_list = []
process = subprocess.Popen(cmd, shell=False, stdout=subprocess.PIPE, stderr=subprocess.STDOUT, encoding="utf-8",
                           text=True)
record = False
num_line = 0;
for line in process.stdout:
    # print(',,,,,', num_line)
    # print(line)
    if record:
        if line.startswith("[dshow"):
            _line = line[index + 2:]
            if _line.startswith("DirectShow audio"):
                record = False
            if record and num_line%2 == 0:
                device_list.append(_line[2:len(_line)-2])
            num_line+=1

    if line.startswith("[dshow"):
        index = line.find("]");
        if index > 0:
            _line = line[index+2:]
            if _line.startswith("DirectShow audio"):
                # print('>>>>>>>', _line)
                num_line = 0
                record = True


for index in range(len(device_list)):
    print('--->',device_list[index])

　　输出：

---> 麦克风 (2- USB Audio Device)
---> virtual-audio-capturer

　　大概逻辑是运行了ffmpeg的命令，然后读取window的CMD输出。

这是音频设备的，如果想要全部可推送设备的，把“DirectShow audio”换成“DirectShow”