给音频加个封面

for %%i in (*.mp3) do ffmpeg -loop 1 -i wx.png -i %%i -c:v libx264 -c:a aac -strict experimental -b:a 192k -shortest out%%~nxi
rem ffmpeg -loop 1 -i wx.png -i yd.mp3 -c:v libx264 -c:a aac -strict experimental -b:a 192k -shortest %%~ni.mp4
rem 音频加封面
rem for %i in (*.mp3) do ffmpeg -loop 1 -i wx.png -i %i -c:v libx264 -c:a aac -strict experimental -b:a 192k -shortest out%~nxi