From f9e4ed99b078aa872d7b31c31c3c3cbbbb07bf46 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Sebastian=20Dr=C3=B6ge?= <sebastian@centricular.com>
Date: Mon, 10 Dec 2018 15:43:19 +0200
Subject: [PATCH] line21dec: If CCs are not found at the previous line, reset
 and search from the beginning again

---
 ext/closedcaption/gstline21dec.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/ext/closedcaption/gstline21dec.c b/ext/closedcaption/gstline21dec.c
index d5ffbe2fd4..03bf94cf69 100644
--- a/ext/closedcaption/gstline21dec.c
+++ b/ext/closedcaption/gstline21dec.c
@@ -396,6 +396,11 @@ gst_line_21_decoder_scan (GstLine21Decoder * self, GstVideoFrame * frame)
       self->line21_offset = i;
       found = TRUE;
       break;
+    } else if (i == self->line21_offset) {
+      /* Otherwise if this was the previously probed line offset,
+       * reset and start searching again from the beginning */
+      i = -1;
+      self->line21_offset = -1;
     }
   }