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-rw-r--r--libavfilter/vf_null.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/libavfilter/vf_null.c b/libavfilter/vf_null.c
index 33b1185ce0..fa80e2a102 100644
--- a/libavfilter/vf_null.c
+++ b/libavfilter/vf_null.c
@@ -43,6 +43,7 @@ static const AVFilterPad avfilter_vf_null_outputs[] = {
const AVFilter ff_vf_null = {
.name = "null",
.description = NULL_IF_CONFIG_SMALL("Pass the source unchanged to the output."),
+ .flags = AVFILTER_FLAG_METADATA_ONLY,
FILTER_INPUTS(avfilter_vf_null_inputs),
FILTER_OUTPUTS(avfilter_vf_null_outputs),
};