diff --git a/libavfilter/trim.c b/libavfilter/trim.c
index 4c1a2b4f48..4afc4c74bb 100644
--- a/libavfilter/trim.c
+++ b/libavfilter/trim.c
@@ -364,6 +364,7 @@ const AVFilter ff_vf_trim = {
     .activate    = activate,
     .priv_size   = sizeof(TrimContext),
     .priv_class  = &trim_class,
+    .flags       = AVFILTER_FLAG_METADATA_ONLY,
     FILTER_INPUTS(trim_inputs),
     FILTER_OUTPUTS(ff_video_default_filterpad),
 };