我在windows上装了cygwin和ffmpeg，当运行音频采集

Question

请问老师，我在windows上装了cygwin和ffmpeg，当运行音频采集命令 ffmpeg -f alsa -I hw:0 out. wav时，提示无alsa命令，为啥？

Answer 1

提问者 qq_Faraward_0 2020-05-05 09:20:34

我把alsa改成dshow也显示无此命令，是我少了啥东西吗？

• 李超 #1

  你这样写不对，进入到课程QQ群里问吧

Answer 2

李超 2020-05-05 00:06:39

alsa 是linux 的设备，在windows 上应该用dshow

• 提问者 qq_Faraward_0 #1

  Windows DirectShow input device.
  
  DirectShow support is enabled when FFmpeg is built with the mingw-w64 project. Currently only audio and video devices are supported.
  
  Multiple devices may be opened as separate inputs, but they may also be opened on the same input, which should improve synchronism between them.
  
  The input name should be in the format:
  官方的意思是要用mingw-64才行？