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-rw-r--r--libavfilter/af_join.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/libavfilter/af_join.c b/libavfilter/af_join.c
index ee87340603..e684cb9ff9 100644
--- a/libavfilter/af_join.c
+++ b/libavfilter/af_join.c
@@ -480,6 +480,7 @@ static int join_request_frame(AVFilterLink *outlink)
frame->nb_samples = nb_samples;
frame->channel_layout = outlink->channel_layout;
frame->sample_rate = outlink->sample_rate;
+ frame->format = outlink->format;
frame->pts = s->input_frames[0]->pts;
frame->linesize[0] = linesize;
if (frame->data != frame->extended_data) {