Is it possible to use Stream in Ghostscript.Net and how to reduce pdf size?

Question

I am working with azure blob storage and usually with large sized scanned pdf documents. I can reduce the size of the documents with GhostscriptProcessor, but first I need to save the document to a physical folder. Because I'm working with blob storage and I have Stream. Can I reduce the size of the documents with stream?

    // "buffer" is file stream that comming from api post
    var ms = new MemoryStream();
    buffer.CopyTo(ms);

    // save file to temp physical folder
    File.WriteAllBytes(inputFile, ms.ToArray());
    ms.Close();

    GhostscriptVersionInfo gvi = new GhostscriptVersionInfo(libPath);
    GhostscriptProcessor proc = new GhostscriptProcessor(gvi);

    List<string> switches = new List<string>();
    switches.Add("-empty");
    switches.Add("-sDEVICE=pdfwrite");
    switches.Add("-dCompatibilityLevel=1.4");
    switches.Add("-dPDFSETTINGS=/ebook");
    switches.Add("-dNOPAUSE");
    switches.Add("-dQUIET");
    switches.Add("-dBATCH");
    switches.Add(@"-sOutputFile=" + outputFile);
    switches.Add(@"-f");
    switches.Add(inputFile);

  // reduce pdf size and save output to temp physical folder
    proc.Process(switches.ToArray());

 // read output file from temp physical folder
    var newStream=File.OpenRead(outputFile);
   ...
   clear temp physical folder and save output file in blob storage...