@@ -148,8 +148,10 @@ static int query_formats(AVFilterContext *ctx)

         out_pix_fmts = levels_out_yuv8_pix_fmts;

     else if (bits == 9)

         out_pix_fmts = levels_out_yuv9_pix_fmts;

-    else // if (bits == 10)

+    else if (bits == 10)

         out_pix_fmts = levels_out_yuv10_pix_fmts;

+    else

+        return AVERROR(EAGAIN);

     if ((ret = ff_formats_ref(ff_make_format_list(out_pix_fmts), &ctx->outputs[0]->in_formats)) < 0)

         return ret;