@@ -332,6 +332,7 @@ static int filter_frame(AVFilterLink *inlink, AVFrame *picref)

 static int query_formats(AVFilterContext *ctx)

 {

+    int ret;

     AVFilterFormats *in_fmts, *out_fmts;

     static const enum AVPixelFormat in_pix_fmts[] = {

         AV_PIX_FMT_YUV420P,

@@ -349,8 +350,12 @@ static int query_formats(AVFilterContext *ctx)

     in_fmts  = ff_make_format_list(in_pix_fmts);

     out_fmts = ff_make_format_list(out_pix_fmts);

-    ff_formats_ref(in_fmts, &ctx->inputs[0]->out_formats);

-    ff_formats_ref(out_fmts, &ctx->outputs[0]->in_formats);

+    ret = ff_formats_ref(in_fmts, &ctx->inputs[0]->out_formats);

+    if (ret < 0)

+        return ret;

+    ret = ff_formats_ref(out_fmts, &ctx->outputs[0]->in_formats);

+    if (ret < 0)

+        return ret;

     return 0;

 }