Previously if ff_outlink_frame_wanted() returned 0 it could dereference a null
pointer when trying to read nb_samples.
---
libavfilter/af_join.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/libavfilter/af_join.c b/libavfilter/af_join.c
index cf5131e8dc..4f86e13558 100644
--- a/libavfilter/af_join.c
+++ b/libavfilter/af_join.c
@@ -485,6 +485,9 @@ static int activate(AVFilterContext *ctx)
return 0;
}
}
+ if (!s->input_frames[0]) {
+ return 0;
+ }
}
nb_samples = s->input_frames[0]->nb_samples;
--
2.16.0.rc1.238.g530d649a79-goog
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