From 0d2cb02f975c9a3186cf16576ee243281f780819 Mon Sep 17 00:00:00 2001
From: n1474335 <n1474335@gmail.com>
Date: Fri, 4 Jan 2019 11:49:12 +0000
Subject: [PATCH] Fixed FLV previous tag size error

---
 src/core/lib/FileSignatures.mjs | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/src/core/lib/FileSignatures.mjs b/src/core/lib/FileSignatures.mjs
index e879fcf7..e55bd566 100644
--- a/src/core/lib/FileSignatures.mjs
+++ b/src/core/lib/FileSignatures.mjs
@@ -1317,9 +1317,10 @@ export function extractFLV(bytes, offset) {
             break;
         }
 
-        if (prevTagSize !== tagSize + 11) {
-            // Previous tag was not valid
-            stream.moveBackwardsBy(tagSize + 11);
+        if (prevTagSize !== (tagSize + 11)) {
+            // Previous tag was not valid, reverse back over this header
+            // and the previous tag body and header
+            stream.moveBackwardsBy(tagSize + 11 + 5);
             break;
         }