Run executable in Powershell with specific filenames as arguments

Question

I'm trying to batch-convert heic images to png images using Powershell. What I have tried:

Get-ChildItem -Include ('*.HEIC', '*.heic') -File | & .\bin\vips.exe copy $_.Name "$(_.BaseName).png"
Pause

and

Get-ChildItem -Include ('*.HEIC', '*.heic') -File | & .\bin\vips.exe copy $_.Name ($_.BaseName + '.png')
Pause

Both times I'm getting an error VipsForeignLoad: file ".png" does not exist which tells me it treats ".png" as the first (and only) argument and ignores the object Name and Basename properties.

Piggy backing off @RetiredGeek's answer, try throwing it in a foreach loop: Get-ChildItem -Filter "*.HEIC" -File | Foreach-Object { & .\bin\vips.exe copy $_.Name "$($_.BaseName).png" } — Abraham Zinala
– Abraham Zinala, Commented May 17, 2021 at 1:45
Also, if you're looking for it to be faster, avoid the pipeline using the grouping operator (...) with the .ForEach() method. — Abraham Zinala
– Abraham Zinala, Commented May 17, 2021 at 5:03
Well foreach(){} is what I meant by a ForEach statement. That one is supposedly the fastest out of the three (with the .foreach method being close 2nd). — gargoylebident
– gargoylebident, Commented May 21, 2021 at 14:34
Big fan of Mr Lee, gonna disagree with the young fellow tho. — Abraham Zinala
– Abraham Zinala, Commented May 21, 2021 at 15:01

RetiredGeek · Accepted Answer · 2021-05-17 01:45:47Z

1

You're missing a $. "$($_.BaseName).png" I would use -Filter vs -Include as it is more efficient.

Edited: Try this approach bypassing the Pipe and see if you get a different result. I've also added some additional code to insure everything is fully evaluated. If this approach works you can experiment with reducing come of the $() evaluation levels.

Also are you using Linux? Some of my googling led me to believe you might be. If so you should specify this in your tags for clarity.

Clear-Host
$x = Get-ChildItem -Filter "*.HEIC" -File
ForEach ($File in $x) {
  & .\bin\vips.exe copy "$($File.FullName)" $("$($File.BaseName)" + ".pdf")
}

Also note the file extension in the Filter is case insensitive so no need to repeat.

I'd also recommend adding the -Path parameter for clarity rather than assuming the default directory but that's just me.

HTH

edited May 17, 2021 at 1:45

answered May 17, 2021 at 0:23

RetiredGeek

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3 Comments

gargoylebident Over a year ago

Still getting the same error. & .\bin\vips.exe copy test.HEIC test.png goes through without issues. Thanks for the filter suggestion.

RetiredGeek Over a year ago

Give the updated answer a go. Please post back your console session if it doesn't work.

gargoylebident Over a year ago

ForEach did it (well, I ended up using ForEach-Object, but that's not crucial)! Didn't even have to do any of the insuring. Also thanks for the -Path suggestion. I'm trying to learn to do these things the proper way, so little pieces of advice like that (or the Filter part) are really helpful.

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