show_pix_fmts     505 cmdutils.h     int show_pix_fmts(void *optctx, const char *opt, const char *arg);
show_pix_fmts      16 cmdutils_common_opts.h     { "pix_fmts"   , OPT_EXIT, {.func_arg = show_pix_fmts },    "show available pixel formats" },