Convert PNG to ICO

[activat]

Hallo, i convert PNG to ICO with next command:

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magick -density 128x128 -background none in.png -resize 128x128 out.ico

as result i have ico file with artefact's. Please help me with correct command.
I use windows.
Example file:

[fmw42]

Please always provide your Imagemagick version and platform/OS when asking questions. Also post your input PNG so we can test with it.

Note that your command should properly read the input first. IM 7 is less forgiving that IM 6.

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magick in.png -background none -resize 128x128 -density 128x128 out.ico

[activat]

Hallo, thank you for help. My IM version is:

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ImageMagick-7.0.8-44-Q16-x64-dll.exe

And i use IM on windows.
Example image in my first post.
I run command you provide and still see artefact's.

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magick red-apple_1f34e.png -background none -resize 128x128 -density 128x128 red-apple_1f34e.ico

That you suggest - its possible to do something?
Thank you again.

[fmw42]

This command works fine for me on IM 7.0.8.44 Q16 HDRI Mac OSX Sierra. Sorry, I do not use Windows.

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magick in.png -background none -resize 128x128 -density 128x128 out.ico

Do you get those artifacts for all PNG files or just that one?

Have you tried upgrading to IM 7.0.8.45?

Is your version of libpng current? Use

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convert -list format

and look at the end of the line for PNG to see the version. Mine is libpng 1.6.36

[activat]

Hallo, i upgrade to latest IM and my libpng is 1.6.37
I have same problem on all my PNG set.
But i find that make problem. It's resize command.
My PNG's is 144x144 size and without resize, just convert - everything perfect.
For me size not important so problem solve itself.
Thanks for help.

[snibgo]

@activat: when you report problems, please link to the actual input and output files, eg out.ico. Supplying a link to a screenshot make by a program such as IrfanView isn't enough, because there might be a bug in IrfanView.

[activat]

You completely right! After check out.ico in another's viewers i found that problem only in my IrfanView .
Thanks for point me on this. Maybe next time i be more smart.
ps: i take files from this page: https://emojipedia.org/facebook/
in.png
out.ico
Many thanks for help!