cmdutils: fix an opt name/val swap in set_context_opts()

Signed-off-by: Stefano Sabatini <stefano.sabatini-lala@poste.it>

cmdutils.c

@@ -494,7 +494,7 @@ void set_context_opts(void *ctx, void *opts_ctx, int flags, AVCodec *codec)
             if (av_find_opt(priv_ctx, opt_names[i], NULL, flags, flags)) {
                 if (av_set_string3(priv_ctx, opt_names[i], opt_values[i], 1, NULL) < 0) {
                     fprintf(stderr, "Invalid value '%s' for option '%s'\n",
-                            opt_names[i], opt_values[i]);
+                            opt_values[i], opt_names[i]);
                     exit(1);
                 }
             } else