From 74c42d9ec3c6e0f0f67923fd151ce2531637a3db Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Sergey=20M=E2=80=A4?= <dstftw@gmail.com>
Date: Sun, 15 Oct 2017 06:13:48 +0700
Subject: [PATCH] [downloader/hls] Ignore anvato ad fragments (closes #14496)

---
 youtube_dl/downloader/hls.py | 28 ++++++++++++++++++++++++----
 1 file changed, 24 insertions(+), 4 deletions(-)

diff --git a/youtube_dl/downloader/hls.py b/youtube_dl/downloader/hls.py
index 46308cf07..7955ca510 100644
--- a/youtube_dl/downloader/hls.py
+++ b/youtube_dl/downloader/hls.py
@@ -75,15 +75,29 @@ class HlsFD(FragmentFD):
                 fd.add_progress_hook(ph)
             return fd.real_download(filename, info_dict)
 
-        total_frags = 0
+        def anvato_ad(s):
+            return s.startswith('#ANVATO-SEGMENT-INFO') and 'type=ad' in s
+
+        media_frags = 0
+        ad_frags = 0
+        ad_frag_next = False
         for line in s.splitlines():
             line = line.strip()
-            if line and not line.startswith('#'):
-                total_frags += 1
+            if not line:
+                continue
+            if line.startswith('#'):
+                if anvato_ad(line):
+                    ad_frags += 1
+                continue
+            if ad_frag_next:
+                ad_frag_next = False
+                continue
+            media_frags += 1
 
         ctx = {
             'filename': filename,
-            'total_frags': total_frags,
+            'total_frags': media_frags,
+            'ad_frags': ad_frags,
         }
 
         self._prepare_and_start_frag_download(ctx)
@@ -101,10 +115,14 @@ class HlsFD(FragmentFD):
         decrypt_info = {'METHOD': 'NONE'}
         byte_range = {}
         frag_index = 0
+        ad_frag_next = False
         for line in s.splitlines():
             line = line.strip()
             if line:
                 if not line.startswith('#'):
+                    if ad_frag_next:
+                        ad_frag_next = False
+                        continue
                     frag_index += 1
                     if frag_index <= ctx['fragment_index']:
                         continue
@@ -175,6 +193,8 @@ class HlsFD(FragmentFD):
                         'start': sub_range_start,
                         'end': sub_range_start + int(splitted_byte_range[0]),
                     }
+                elif anvato_ad(line):
+                    ad_frag_next = True
 
         self._finish_frag_download(ctx)