{"no-txt", no_argument, &render_txt, 0},
{"no-stdout", no_argument, &render_stdout, 0},
{"pdf", no_argument, &render_pdf, 1},
{"no-txt", no_argument, &render_txt, 0},
{"no-stdout", no_argument, &render_stdout, 0},
{"pdf", no_argument, &render_pdf, 1},