From 3ac5430311b20f30814cdabf5724fb687748bb5b Mon Sep 17 00:00:00 2001
From: Jan Schmidt <jan@centricular.com>
Date: Mon, 16 Jul 2018 23:43:29 +1000
Subject: [PATCH] splitmuxsrc: Make sure events are writable

Before setting the seqnum on events sent downstream,
make sure they are writable.
---
 gst/multifile/gstsplitmuxsrc.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/gst/multifile/gstsplitmuxsrc.c b/gst/multifile/gstsplitmuxsrc.c
index 2434218cc3..0de0db66b5 100644
--- a/gst/multifile/gstsplitmuxsrc.c
+++ b/gst/multifile/gstsplitmuxsrc.c
@@ -480,8 +480,10 @@ gst_splitmux_handle_event (GstSplitMuxSrc * splitmux,
 
       gst_event_unref (event);
       event = gst_event_new_segment (&seg);
-      if (splitmux->segment_seqnum)
+      if (splitmux->segment_seqnum) {
+        event = gst_event_make_writable (event);
         gst_event_set_seqnum (event, splitmux->segment_seqnum);
+      }
       splitpad->sent_segment = TRUE;
       break;
     }