How ffmpeg can return wavespic png image to console in png -

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this command return wavespic in stdout.

ffmpeg -i "/home/01.mp3" -filter_complex "aformat=channel_layouts=mono,compand,showwavespic=s=640x120" -frames:v 1 -f  image2 -

i want return stdout wavespic in png format. cant choose format in case -f image2 -. yes can -f output.png dont want save file disk.

use

ffmpeg -i "/home/01.mp3" -filter_complex "aformat=channel_layouts=mono,compand,showwavespic=s=640x120" -c:v png -frames:v 1 -f  image2 -

if need indexed colors, add -pix_fmt pal8


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