Setting Deno.Command priority and affinity (on windows)

Is it possible to set a tasks / commands priority and affinity directly?

Code:

await new Deno.Command("ffmpeg", {args: ["-i", filename, `${folder}/frame%08d.png`, "-threads", "1"]}).output();

await new Deno.Command("ffmpeg", {args: ["-i", filename, `${folder}/frame%08d.png`, "-threads", "1"]}).output();