Input and output parameters

[acteds]

Batch (.bat)

Use parameters:

pngquant.exe --force --speed 1 - >"%%~a-out.png" <"%%~a"

When used in batches, sometimes:

1. The output file size is 0
2. The output file is not a valid image and cannot be opened
3. The image content of the output file is partially lost and can be opened

Use parameters:

pngquant.exe --force --speed 1 --output "%%~a-out.png" "%%~a"

No above problems, what is the reason?

[kornelski]

When you use >, pngquant isn't creating the file, your shell (cmd.exe) is. It's outside of my control.

[acteds]

When you use >, pngquant isn't creating the file, your shell (cmd.exe) is. It's outside of my control.

I see.