ffmpeg：无法识别音频输入设备

Posted 2023-02-25

【中文标题】ffmpeg：无法识别音频输入设备

【英文标题】：ffmpeg: Audio input device not recognized

【发布时间】：2019-12-05 20:17:38

【问题描述】：

我的 ffmpeg 命令需要什么来识别我的音频输入设备？

以下参考没有帮助解决我的问题：enter link description here

我想在捕获屏幕活动时记录我（与我的 Windows 笔记本电脑）的谈话。虽然我已成功捕获屏幕上的内容（通过从我的命令中删除所有提及的音频），但我无法捕获音频，因为我提到的设备无法被 ffmpeg 识别。 （我经常使用默认笔记本电脑向 Audacity 输入音频……当然，在这个 ffmpeg 命令中也可以使用它。）

我的音频设备：

ffmpeg -list_devices true -f dshow -i dummy

    [dshow @ 000000000044a940] DirectShow audio devices
    [dshow @ 000000000044a940]  "Microphone Array (IDT High Defi"
    [dshow @ 000000000044a940]     Alternative name "@device_cm_33D9A762-90C8-11D0-BD43-00A0C911CE86\Microphone Array (IDT High Defi"
    [dshow @ 000000000044a940]  "Dock Mic (IDT High Definition A"
    [dshow @ 000000000044a940]     Alternative name "@device_cm_33D9A762-90C8-11D0-BD43-00A0C911CE86\Dock Mic (IDT High Definition A"
    [dshow @ 000000000044a940]  "Jack Mic (IDT High Definition A"
    [dshow @ 000000000044a940]     Alternative name "@device_cm_33D9A762-90C8-11D0-BD43-00A0C911CE86\Jack Mic (IDT High Definition A"
    [dshow @ 000000000044a940]  "Rec. Playback (IDT High Definit"
    [dshow @ 000000000044a940]     Alternative name "@device_cm_33D9A762-90C8-11D0-BD43-00A0C911CE86\Rec. Playback (IDT High Definit"

通过regedit找到全称：Microphone Array (IDT High Definition Audio CODEC)

为什么找不到音频输入设备？

ffmpeg -y -f gdigrab -i desktop -framerate 10 -f dshow -i audio="Microphone Array (IDT High Definition Audio CODEC)" -vcodec libx264 "C:\jed\ffmpeg\_mydata\clip.mp4"

    [gdigrab @ 0000000000498540] Capturing whole desktop as 1366x768x32 at (0,0)
    [gdigrab @ 0000000000498540] Stream #0: not enough frames to estimate rate; consider increasing probesize
    Input #0, gdigrab, from 'desktop':
      Duration: N/A, start: 1575576239.093815, bitrate: 1006131 kb/s
        Stream #0:0: Video: bmp, bgra, 1366x768, 1006131 kb/s, 29.97 fps, 1000k tbr, 1000k tbn, 1000k tbc
    [dshow @ 000000000049a5e0] Could not find audio only device with name [Microphone Array (IDT High Definition Audio CODEC)] among source devices of type audio.
    [dshow @ 000000000049a5e0] Searching for audio device within video devices for Microphone Array (IDT High Definition Audio CODEC)
    [dshow @ 000000000049a5e0] Could not find audio only device with name [Microphone Array (IDT High Definition Audio CODEC)] among source devices of type video.
    audio=Microphone Array (IDT High Definition Audio CODEC): I/O error

【问题讨论】：

尝试使用 ffmpeg 显示的确切字符串。

【参考方案1】：

Gyan 是正确的。使用 DirectShow 列表中报告的截断表达式有效。

audio="Microphone Array (IDT High Defi"