从视频中提取音频MP3

命令：

 

D:\Soft\win-pyvideotrans-v3.98\ffmpeg\ffmpeg -i D:\Temp2\demo1.mp4 -vn D:\Temp2\output1.mp3


D:\Soft\win-pyvideotrans-v3.98\ffmpeg\ffmpeg -i D:\Temp2\样本2.mp4 -vn D:\Temp2\output2.mp3