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-rw-r--r--gst/rtpmux/gstrtpmux.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/gst/rtpmux/gstrtpmux.c b/gst/rtpmux/gstrtpmux.c
index 9ceedb6e..79af6a45 100644
--- a/gst/rtpmux/gstrtpmux.c
+++ b/gst/rtpmux/gstrtpmux.c
@@ -364,7 +364,9 @@ gst_rtp_mux_chain (GstPad * pad, GstBuffer * buffer)
GstFlowReturn ret;
rtp_mux = GST_RTP_MUX (gst_pad_get_parent (pad));
-
+
+ buffer = gst_buffer_make_writable(buffer);
+
rtp_mux->seqnum++;
GST_LOG_OBJECT (rtp_mux, "setting RTP seqnum %d", rtp_mux->seqnum);
gst_rtp_buffer_set_seq (buffer, rtp_mux->seqnum);