[FFmpeg-user] Error configuring filters. (AudioBars)

[Manmathan]

Trying to figure out how to display audiobar.

ffplay -f lavfi "amovie=p.mp4, asplit [a][out1]; [a]
showvolume=f=255:b=4:w=720:h=68 [out0]" 

*Error No Such filter : "showvolume". *
*Invalid arguments.*

Downloaded the latest from ffmpeg website, but the list as per "ffmpeg 
-filters" doesnot show "showvolume" filter.

How can I add this filter.




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