avprobe.c

    octx.print_array_header = ini_print_array_header;
    octx.print_array_footer = ini_print_array_footer;
    octx.print_object_header = ini_print_object_header;

    octx.print_integer = ini_print_integer;
    octx.print_string = ini_print_string;

    parse_options(NULL, argc, argv, options, opt_input_file);

    if (!input_filename) {
        show_usage();
        fprintf(stderr, "You have to specify one input file.\n");
        fprintf(stderr,
                "Use -h to get full help or, even better, run 'man %s'.\n",
                program_name);
        exit_program(1);
    }

    probe_out = avio_alloc_context(buffer, AVP_BUFFSIZE, 1, NULL, NULL,
                                 probe_buf_write, NULL);
    if (!probe_out)
        exit_program(1);

    probe_header();
    ret = probe_file(input_filename);
    probe_footer();
    avio_flush(probe_out);
    avio_close(probe_out);

    avformat_network_deinit();

    return ret;
}