运行获取python错误信息的命令

Question

Wassup。
我有shell命令

ffmpeg -list_devices true -f dshow -i dummy -hide_banner

当我运行该命令时，我会得到输出数据（参见下面的文本）

[dshow @ 00000281450fbdc0] DirectShow video devices (some may be both video and audio devices)
[dshow @ 00000281450fbdc0]  "HD WebCam"
[dshow @ 00000281450fbdc0]     Alternative name "@device_pnp_\\?\usb#vid_0408&pid_a060&mi_00#6&391c16c1&0&0000#{65e8773d-8f56-11d0-a3b9-00a0c9223196}\global"
[dshow @ 00000281450fbdc0] DirectShow audio devices

[dshow @ 00000281450fbdc0]  "Microphone (Realtek High Definition Audio)"
[dshow @ 00000281450fbdc0]     Alternative name "@device_cm_{33D9A762-90C8-11D0-BD43-00A0C911CE86}\wave_{4727F33A-DE04-4706-8312-03696FACC791}"
[dshow @ 00000281450fbdc0]  "Stereo mix (Realtek High Definition Audio)"
[dshow @ 00000281450fbdc0]     Alternative name "@device_cm_{33D9A762-90C8-11D0-BD43-00A0C911CE86}\wave_{534A8FBC-6C02-4384-B51C-D0363BB7F8FD}"
[dshow @ 00000281450fbdc0]  "Microphone (Avsoft Virtual Audio Device)"
[dshow @ 00000281450fbdc0]     Alternative name "@device_cm_{33D9A762-90C8-11D0-BD43-00A0C911CE86}\wave_{5CE20B48-361E-4B96-B113-B3E02BA448EC}"
dummy: Immediate exit requested

我必须得到所有音频设备的列表。 我不想解析那个字符串，我会很难。 如何使用ffmpeg python模块获取所有音频设备的列表？ 谢谢你

UPD： 我已决定解析该字符串。但当我打字时：

command = subprocess.check_output('ffmpeg -list_devices true -f dshow -i dummy -hide_banner', shell=True)

我得到这个错误：

subprocess.CalledProcessError: Command 'ffmpeg -list_devices true -f dshow -i dummy -hide_banner' returned non-zero exit status 1.

如何调用该命令并将其结果放入变量“command”中

Answer 1

command = subprocess.run('ffmpeg -list_devices true -f dshow -i dummy -hide_banner', shell=True, stderr=subprocess.PIPE, text=True, encoding='utf-8')
print(command.stderr)