+static int process_command(AVFilterContext *ctx, const char *cmd, const char *args,
+ char *res, int res_len, int flags)
+{
+ int ret = ff_filter_process_command(ctx, cmd, args, res, res_len, flags);
+
+ if (ret < 0)
+ return ret;
+
+ return config_input(ctx->inputs[0]);
+}
+