1 files changed, 4 insertions, 3 deletions
diff --git a/libavfilter/vf_stack.c b/libavfilter/vf_stack.c
index 8a90caada7..c4bbd6166d 100644
--- a/libavfilter/vf_stack.c
+++ b/libavfilter/vf_stack.c
@@ -43,14 +43,15 @@ typedef struct StackContext {
 static int query_formats(AVFilterContext *ctx)
 {
     AVFilterFormats *pix_fmts = NULL;
-    int fmt;
+    int fmt, ret;
 
     for (fmt = 0; av_pix_fmt_desc_get(fmt); fmt++) {
         const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(fmt);
         if (!(desc->flags & AV_PIX_FMT_FLAG_PAL ||
               desc->flags & AV_PIX_FMT_FLAG_HWACCEL ||
-              desc->flags & AV_PIX_FMT_FLAG_BITSTREAM))
-            ff_add_format(&pix_fmts, fmt);
+              desc->flags & AV_PIX_FMT_FLAG_BITSTREAM) &&
+            (ret = ff_add_format(&pix_fmts, fmt)) < 0)
+            return ret;
     }
 
     return ff_set_common_formats(ctx, pix_fmts);