How to use vtracer in the terminal to output via stdout instead of saving to a local file?

[frankwu-delphi]

I am using other tools to create an interface and calling vtracer to convert a bitmap to an SVG file by capturing the terminal output. However, when I tried the command "vtracer -i d:\test.png -o -" in the terminal, there was no result output, only a prompt saying "Conversion successful."
Can you tell me what went wrong? Thank you.

[tyt2y3]

The cmd does not currently support -o - as a way to print to stdout.
But really this can be supported 'easily', if anyone knows Rust, or I, could spare a little time.

[frankwu-delphi]

Yes, I’m not familiar with Rust. The tool I use is Delphi. I simply modified the write_svg function in converter.rs to meet my current usage requirements.
`
fn write_svg(svg: SvgFile, output_path: &Path) -> Result<(), String> {
//let out_file = File::create(output_path);
// let mut out_file = match out_file {
// Ok(file) => file,
// Err(_) => return Err(String::from("Cannot create output file.")),
//};

//write!(&mut out_file, "{}", svg).expect("failed to write file.");
println!("{}", svg.to_string());
Ok(())
}
`

[frankwu-delphi]

and, I hope to add stdin/stdout in the new version.

[tyt2y3]

yes, basically:

if output_path == "-" {
println!(..);
} else {
// open file and write
}