avfilter/f_metadata: correct check for existing metadata

When adding metadata, existing dictionary need not be present.
SaschaVasarrhelyi · Jan 17, 2020 · c95dfe5 · c95dfe5
1 parent 7fc2846
commit c95dfe5
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/libavfilter/f_metadata.c b/libavfilter/f_metadata.c
@@ -304,7 +304,7 @@ static int filter_frame(AVFilterLink *inlink, AVFrame *frame)
     AVDictionary **metadata = &frame->metadata;
     AVDictionaryEntry *e;
 
-    if (!*metadata)
+    if (!*metadata && s->mode != METADATA_ADD)
         return ff_filter_frame(outlink, frame);
 
     e = av_dict_get(*metadata, !s->key ? "" : s->key, NULL,