From b0c1db5bb5d95b12eb88afd56dc2dcdfb5e7b216 Mon Sep 17 00:00:00 2001
From: Alaric Senat <dev.asenat@posteo.net>
Date: Fri, 2 Feb 2024 09:47:34 +0100
Subject: [PATCH] mux: webvtt: signal header blocks

This will be used by HLS to properly segment subtitles.
---
 modules/mux/webvtt.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/modules/mux/webvtt.c b/modules/mux/webvtt.c
index 2ba90b8099..8639d34a62 100644
--- a/modules/mux/webvtt.c
+++ b/modules/mux/webvtt.c
@@ -188,7 +188,10 @@ static int Mux(sout_mux_t *mux)
         }
 
         if (data)
+        {
+            data->i_flags |= BLOCK_FLAG_HEADER;
             sout_AccessOutWrite(mux->p_access, data);
+        }
         sys->header_done = true;
     }