diff --git a/src/you_get/extractors/pptv.py b/src/you_get/extractors/pptv.py
index b1d45edf..17e146ac 100644
--- a/src/you_get/extractors/pptv.py
+++ b/src/you_get/extractors/pptv.py
@@ -5,24 +5,142 @@ __all__ = ['pptv_download', 'pptv_download_by_id']
 from ..common import *
 
 import re
+import time
 import urllib
-import hashlib
+from random import random
+
+
+def constructKey(arg):
+
+    def str2hex(s):
+        r=""
+        for i in s[:8]:
+            t=hex(ord(i))[2:]
+            if len(t)==1:
+                t="0"+t
+            r+=t
+        for i in range(16):
+            r+=hex(int(15*random()))[2:]
+        return r
+
+    #ABANDONED  Because SERVER_KEY is static
+    def getkey(s):
+        #returns 1896220160
+        l2=[i for i in s]
+        l4=0
+        l3=0
+        while l4<len(l2):
+            l5=l2[l4]
+            l6=ord(l5)
+            l7=l6<<((l4%4)*8)
+            l3=l3^l7
+            l4+=1
+        return l3
+        pass
+    
+    def rot(k,b): ##>>> in as3
+        if k>=0:
+            return k>>b
+        elif k<0:
+            return (2**32+k)>>b
+        pass
+     
+    def lot(k,b):
+        return (k<<b)%(2**32)
+
+    #WTF?
+    def encrypt(arg1,arg2):
+        delta=2654435769
+        l3=16;
+        l4=getkey(arg2)  #1896220160
+        l8=[i for i in arg1]
+        l10=l4;
+        l9=[i for i in arg2]
+        l5=lot(l10,8)|rot(l10,24)#101056625
+        # assert l5==101056625
+        l6=lot(l10,16)|rot(l10,16)#100692230
+        # assert 100692230==l6
+        l7=lot(l10,24)|rot(l10,8)
+        # assert 7407110==l7
+        l11=""
+        l12=0
+        l13=ord(l8[l12])<<0
+        l14=ord(l8[l12+1])<<8
+        l15=ord(l8[l12+2])<<16
+        l16=ord(l8[l12+3])<<24
+        l17=ord(l8[l12+4])<<0
+        l18=ord(l8[l12+5])<<8
+        l19=ord(l8[l12+6])<<16
+        l20=ord(l8[l12+7])<<24
+     
+        l21=(((0|l13)|l14)|l15)|l16
+        l22=(((0|l17)|l18)|l19)|l20
+     
+        l23=0
+        l24=0
+        while l24<32:
+            l23=(l23+delta)%(2**32)
+            l33=(lot(l22,4)+l4)%(2**32)
+            l34=(l22+l23)%(2**32)
+            l35=(rot(l22,5)+l5)%(2**32)
+            l36=(l33^l34)^l35
+            l21=(l21+l36)%(2**32)
+            l37=(lot(l21,4)+l6)%(2**32)
+            l38=(l21+l23)%(2**32)
+            l39=(rot(l21,5))%(2**32)
+            l40=(l39+l7)%(2**32)
+            l41=((l37^l38)%(2**32)^l40)%(2**32)
+            l22=(l22+l41)%(2**32)
+     
+            l24+=1
+     
+        l11+=chr(rot(l21,0)&0xff)
+        l11+=chr(rot(l21,8)&0xff)
+        l11+=chr(rot(l21,16)&0xff)
+        l11+=chr(rot(l21,24)&0xff)
+        l11+=chr(rot(l22,0)&0xff)
+        l11+=chr(rot(l22,8)&0xff)
+        l11+=chr(rot(l22,16)&0xff)
+        l11+=chr(rot(l22,24)&0xff)
+     
+        return l11        
+            
+
+    loc1=hex(int(arg))[2:]+(16-len(hex(int(arg))[2:]))*"\x00"
+    SERVER_KEY="qqqqqww"+"\x00"*9
+    res=encrypt(loc1,SERVER_KEY)
+    return str2hex(res)
+
 
 def pptv_download_by_id(id, title = None, output_dir = '.', merge = True, info_only = False):
     xml = get_html('http://web-play.pptv.com/webplay3-0-%s.xml?type=web.fpp' % id)
+    #vt=3 means vod mode vt=5 means live mode
     host = r1(r'<sh>([^<>]+)</sh>', xml)
-    key = r1(r'<key expire=[^<>]+>([^<>]+)</key>', xml)
+    k = r1(r'<key expire=[^<>]+>([^<>]+)</key>', xml)
     rid = r1(r'rid="([^"]+)"', xml)
     title = r1(r'nm="([^"]+)"', xml)
+
+    st=r1(r'<st>([^<>]+)</st>',xml)[:-4]
+    st=time.mktime(time.strptime(st))*1000-60*1000-time.time()*1000
+    st+=time.time()*1000
+    st=st/1000
+
+    key=constructKey(st)
+
     pieces = re.findall('<sgm no="(\d+)"[^<>]+fs="(\d+)"', xml)
     numbers, fs = zip(*pieces)
-    urls = ['http://%s/%s/%s?k=%s' % (host, i, rid, key) for i in numbers]
+    urls=[ "http://ccf.pptv.com/{}/{}?key={}&fpp.ver=1.3.0.4&k={}&type=web.fpp".format(i,rid,key,k)  for i in range(max(map(int,numbers))+1)]
+
     total_size = sum(map(int, fs))
     assert rid.endswith('.mp4')
-    
     print_info(site_info, title, 'mp4', total_size)
+
     if not info_only:
-        download_urls(urls, title, 'mp4', total_size, output_dir = output_dir, merge = merge)
+        try:
+            download_urls(urls, title, 'mp4', total_size, output_dir = output_dir, merge = merge)
+        except urllib.error.HTTPError:
+            #for key expired
+            pptv_download_by_id(id, output_dir = output_dir, merge = merge, info_only = info_only)
 
 def pptv_download(url, output_dir = '.', merge = True, info_only = False):
     assert re.match(r'http://v.pptv.com/show/(\w+)\.html$', url)