"mouse click         seek to percentage in file corresponding to fraction of width\n"
void show_help(void){    printf("ffplay version " FFMPEG_VERSION ", Copyright (c) 2003 Fabrice Bellard\n"           "usage: ffplay [options] input_file\n"           "Simple media player\n");    printf("\n");    show_help_options(options, "Main options:\n",                      OPT_EXPERT, 0);    show_help_options(options, "\nAdvanced options:\n",                      OPT_EXPERT, OPT_EXPERT);    printf("\nWhile playing:\n"           "q, ESC              quit\n"           "f                   toggle full screen\n"           "p, SPC              pause\n"           "a                   cycle audio channel\n"           "v                   cycle video channel\n"           "w                   show audio waves\n"           "left/right          seek backward/forward 10 seconds\n"           "down/up             seek backward/forward 1 minute\n"           );    exit(1);}