--[[
$Id$
Copyright © 2007-2020 the VideoLAN team
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
--]]
-- Helper function to get a parameter's value in a URL
function get_url_param( url, name )
local _, _, res = string.find( url, "[&?]"..name.."=([^&]*)" )
return res
end
-- Helper function to copy a parameter when building a new URL
function copy_url_param( url, name )
local value = get_url_param( url, name )
return ( value and "&"..name.."="..value or "" ) -- Ternary operator
end
function get_arturl()
local iurl = get_url_param( vlc.path, "iurl" )
if iurl then
return iurl
end
local video_id = get_url_param( vlc.path, "v" )
if not video_id then
return nil
end
return vlc.access.."://img.youtube.com/vi/"..video_id.."/default.jpg"
end
-- Pick the most suited format available
function get_fmt( fmt_list )
local prefres = vlc.var.inherit(nil, "preferred-resolution")
if prefres < 0 then
return nil
end
local fmt = nil
for itag,height in string.gmatch( fmt_list, "(%d+)/%d+x(%d+)[^,]*" ) do
-- Apparently formats are listed in quality
-- order, so we take the first one that works,
-- or fallback to the lowest quality
fmt = itag
if tonumber(height) <= prefres then
break
end
end
return fmt
end
-- Helper emulating vlc.readline() to work around its failure on
-- very long lines (see #24957)
function read_long_line()
local eol
local pos = 0
local len = 32768
repeat
len = len * 2
local line = vlc.peek( len )
if not line then return nil end
eol = string.find( line, "\n", pos + 1 )
pos = len
until eol or len >= 1024 * 1024 -- No EOF detection, loop until limit
return vlc.read( eol or len )
end
-- Buffering iterator to parse through the HTTP stream several times
-- without making several HTTP requests
function buf_iter( s )
s.i = s.i + 1
local line = s.lines[s.i]
if not line then
-- Put back together statements split across several lines,
-- otherwise we won't be able to parse them
repeat
local l = s.stream:readline()
if not l then break end
line = line and line..l or l -- Ternary operator
until string.match( line, "};$" )
if line then
s.lines[s.i] = line
end
end
return line
end
-- Helper to search and extract code from javascript stream
function js_extract( js, pattern )
js.i = 0 -- Reset to beginning
for line in buf_iter, js do
local ex = string.match( line, pattern )
if ex then
return ex
end
end
vlc.msg.err( "Couldn't process youtube video URL, please check for updates to this script" )
return nil
end
-- Descramble the URL signature using the javascript code that does that
-- in the web page
function js_descramble( sig, js_url )
-- Fetch javascript code
local js = { stream = vlc.stream( js_url ), lines = {}, i = 0 }
if not js.stream then
vlc.msg.err( "Couldn't process youtube video URL, please check for updates to this script" )
return sig
end
-- Look for the descrambler function's name
-- if(k.s){var l=k.sp,m=pt(decodeURIComponent(k.s));f.set(l,encodeURIComponent(m))}
-- k.s (from stream map field "s") holds the input scrambled signature
-- k.sp (from stream map field "sp") holds a parameter name (normally
-- "signature" or "sig") to set with the output, descrambled signature
local descrambler = js_extract( js, "[=%(,&|](..)%(decodeURIComponent%(.%.s%)%)" )
if not descrambler then
vlc.msg.dbg( "Couldn't extract youtube video URL signature descrambling function name" )
return sig
end
-- Fetch the code of the descrambler function
-- Go=function(a){a=a.split("");Fo.sH(a,2);Fo.TU(a,28);Fo.TU(a,44);Fo.TU(a,26);Fo.TU(a,40);Fo.TU(a,64);Fo.TR(a,26);Fo.sH(a,1);return a.join("")};
local rules = js_extract( js, "^"..descrambler.."=function%([^)]*%){(.-)};" )
if not rules then
vlc.msg.dbg( "Couldn't extract youtube video URL signature descrambling rules" )
return sig
end
-- Get the name of the helper object providing transformation definitions
local helper = string.match( rules, ";(..)%...%(" )
if not helper then
vlc.msg.dbg( "Couldn't extract youtube video URL signature transformation helper name" )
vlc.msg.err( "Couldn't process youtube video URL, please check for updates to this script" )
return sig
end
-- Fetch the helper object code
-- var Fo={TR:function(a){a.reverse()},TU:function(a,b){var c=a[0];a[0]=a[b%a.length];a[b]=c},sH:function(a,b){a.splice(0,b)}};
local transformations = js_extract( js, "[ ,]"..helper.."={(.-)};" )
if not transformations then
vlc.msg.dbg( "Couldn't extract youtube video URL signature transformation code" )
return sig
end
-- Parse the helper object to map available transformations
local trans = {}
for meth,code in string.gmatch( transformations, "(..):function%([^)]*%){([^}]*)}" ) do
-- a=a.reverse()
if string.match( code, "%.reverse%(" ) then
trans[meth] = "reverse"
-- a.splice(0,b)
elseif string.match( code, "%.splice%(") then
trans[meth] = "slice"
-- var c=a[0];a[0]=a[b%a.length];a[b]=c
elseif string.match( code, "var c=" ) then
trans[meth] = "swap"
else
vlc.msg.warn("Couldn't parse unknown youtube video URL signature transformation")
end
end
-- Parse descrambling rules, map them to known transformations
-- and apply them on the signature
local missing = false
for meth,idx in string.gmatch( rules, "..%.(..)%([^,]+,(%d+)%)" ) do
idx = tonumber( idx )
if trans[meth] == "reverse" then
sig = string.reverse( sig )
elseif trans[meth] == "slice" then
sig = string.sub( sig, idx + 1 )
elseif trans[meth] == "swap" then
if idx > 1 then
sig = string.gsub( sig, "^(.)("..string.rep( ".", idx - 1 )..")(.)(.*)$", "%3%2%1%4" )
elseif idx == 1 then
sig = string.gsub( sig, "^(.)(.)", "%2%1" )
end
else
vlc.msg.dbg("Couldn't apply unknown youtube video URL signature transformation")
missing = true
end
end
if missing then
vlc.msg.err( "Couldn't process youtube video URL, please check for updates to this script" )
end
return sig
end
-- Parse and assemble video stream URL
function stream_url( params, js_url )
local url = string.match( params, "url=([^&]+)" )
if not url then
return nil
end
url = vlc.strings.decode_uri( url )
-- Descramble any scrambled signature and append it to URL
local s = string.match( params, "s=([^&]+)" )
if s then
s = vlc.strings.decode_uri( s )
vlc.msg.dbg( "Found "..string.len( s ).."-character scrambled signature for youtube video URL, attempting to descramble... " )
if js_url then
s = js_descramble( s, js_url )
else
vlc.msg.err( "Couldn't process youtube video URL, please check for updates to this script" )
end
local sp = string.match( params, "sp=([^&]+)" )
if not sp then
vlc.msg.warn( "Couldn't extract signature parameters for youtube video URL, guessing" )
sp = "signature"
end
url = url.."&"..sp.."="..vlc.strings.encode_uri_component( s )
end
return url
end
-- Parse and pick our video stream URL (classic parameters)
function pick_url( url_map, fmt, js_url )
for stream in string.gmatch( url_map, "[^,]+" ) do
local itag = string.match( stream, "itag=(%d+)" )
if not fmt or not itag or tonumber( itag ) == tonumber( fmt ) then
return stream_url( stream, js_url )
end
end
return nil
end
-- Parse and pick our video stream URL (new-style parameters)
function pick_stream( stream_map, js_url )
local pick = nil
local fmt = tonumber( get_url_param( vlc.path, "fmt" ) )
if fmt then
-- Legacy match from URL parameter
for stream in string.gmatch( stream_map, '{(.-)}' ) do
local itag = tonumber( string.match( stream, '"itag":(%d+)' ) )
if fmt == itag then
pick = stream
break
end
end
else
-- Compare the different available formats listed with our
-- quality targets
local prefres = vlc.var.inherit( nil, "preferred-resolution" )
local bestres = nil
for stream in string.gmatch( stream_map, '{(.-)}' ) do
local height = tonumber( string.match( stream, '"height":(%d+)' ) )
-- Better than nothing
if not pick or ( height and ( not bestres
-- Better quality within limits
or ( ( prefres < 0 or height <= prefres ) and height > bestres )
-- Lower quality more suited to limits
or ( prefres > -1 and bestres > prefres and height < bestres )
) ) then
bestres = height
pick = stream
end
end
end
if not pick then
return nil
end
-- Either the "url" or the "signatureCipher" parameter is present,
-- depending on whether the URL signature is scrambled.
local cipher = string.match( pick, '"signatureCipher":"(.-)"' )
or string.match( pick, '"[a-zA-Z]*[Cc]ipher":"(.-)"' )
if cipher then
-- Scrambled signature: some assembly required
local url = stream_url( cipher, js_url )
if url then
return url
end
end
-- Unscrambled signature, already included in ready-to-use URL
return string.match( pick, '"url":"(.-)"' )
end
-- Probe function.
function probe()
return ( ( vlc.access == "http" or vlc.access == "https" )
and (
string.match( vlc.path, "^www%.youtube%.com/" )
or string.match( vlc.path, "^music%.youtube%.com/" )
or string.match( vlc.path, "^gaming%.youtube%.com/" ) -- out of use
) and (
string.match( vlc.path, "/watch%?" ) -- the html page
or string.match( vlc.path, "/live$" ) -- user live stream html page
or string.match( vlc.path, "/live%?" ) -- user live stream html page
or string.match( vlc.path, "/get_video_info%?" ) -- info API
or string.match( vlc.path, "/v/" ) -- video in swf player
or string.match( vlc.path, "/embed/" ) -- embedded player iframe
) )
end
-- Parse function.
function parse()
if not string.match( vlc.path, "^www%.youtube%.com/" ) then
-- Skin subdomain
return { { path = vlc.access.."://"..string.gsub( vlc.path, "^([^/]*)/", "www.youtube.com/" ) } }
elseif string.match( vlc.path, "/watch%?" )
or string.match( vlc.path, "/live$" )
or string.match( vlc.path, "/live%?" )
then -- This is the HTML page's URL
local js_url
-- fmt is the format of the video
-- (cf. http://en.wikipedia.org/wiki/YouTube#Quality_and_formats)
fmt = get_url_param( vlc.path, "fmt" )
while true do
-- The new HTML code layout has fewer and longer lines; always
-- use the long line workaround until we get more visibility.
local line = new_layout and read_long_line() or vlc.readline()
if not line then break end
-- The next line is the major configuration line that we need.
-- It is very long so we need this workaround (see #24957).
if string.match( line, '^ *<div id="player%-api">' ) then
line = read_long_line()
if not line then break end
end
if not title then
local meta = string.match( line, '<meta property="og:title"( .-)>' )
if meta then
title = string.match( meta, ' content="(.-)"' )
if title then
title = vlc.strings.resolve_xml_special_chars( title )
end
end
end
if not description then
-- FIXME: there is another version of this available,
-- without the double JSON string encoding, but we're
-- unlikely to access it due to #24957
description = string.match( line, '\\"shortDescription\\":\\"(.-[^\\])\\"')
if description then
-- FIXME: do this properly (see #24958)
description = string.gsub( description, '\\(["\\/])', '%1' )
else
description = string.match( line, '"shortDescription":"(.-[^\\])"')
end
if description then
if string.match( description, '^"' ) then
description = ""
end
-- FIXME: do this properly (see #24958)
-- This way of unescaping is technically wrong
-- so as little as possible of it should be done
description = string.gsub( description, '\\(["\\/])', '%1' )
description = string.gsub( description, '\\n', '\n' )
description = string.gsub( description, '\\r', '\r' )
description = string.gsub( description, "\\u0026", "&" )
end
end
if not arturl then
local meta = string.match( line, '<meta property="og:image"( .-)>' )
if meta then
arturl = string.match( meta, ' content="(.-)"' )
if arturl then
arturl = vlc.strings.resolve_xml_special_chars( arturl )
end
end
end
if not artist then
artist = string.match(line, '\\"author\\":\\"(.-)\\"')
if artist then
-- FIXME: do this properly (see #24958)
artist = string.gsub( artist, '\\(["\\/])', '%1' )
else
artist = string.match( line, '"author":"(.-)"' )
end
if artist then
-- FIXME: do this properly (see #24958)
artist = string.gsub( artist, "\\u0026", "&" )
end
end
if not new_layout then
if string.match( line, '<script nonce="' ) then
vlc.msg.dbg( "Detected new YouTube HTML code layout" )
new_layout = true
end
end
-- We need this when parsing the main stream configuration;
-- it can indeed be found on that same line (among others).
if not js_url then
js_url = string.match( line, '"jsUrl":"(.-)"' )
or string.match( line, "\"js\": *\"(.-)\"" )
if js_url then
js_url = string.gsub( js_url, "\\/", "/" )
-- Resolve URL
if string.match( js_url, "^/[^/]" ) then
local authority = string.match( vlc.path, "^([^/]*)/" )
js_url = "//"..authority..js_url
end
js_url = string.gsub( js_url, "^//", vlc.access.."://" )
end
end
-- JSON parameters, also formerly known as "swfConfig",
-- "SWF_ARGS", "swfArgs", "PLAYER_CONFIG", "playerConfig" ...
if string.match( line, "ytplayer%.config" ) then
-- Classic parameters - out of use since early 2020
if not fmt then
fmt_list = string.match( line, "\"fmt_list\": *\"(.-)\"" )
if fmt_list then
fmt_list = string.gsub( fmt_list, "\\/", "/" )
fmt = get_fmt( fmt_list )
end
end
url_map = string.match( line, "\"url_encoded_fmt_stream_map\": *\"(.-)\"" )
if url_map then
vlc.msg.dbg( "Found classic parameters for youtube video stream, parsing..." )
-- FIXME: do this properly (see #24958)
url_map = string.gsub( url_map, "\\u0026", "&" )
path = pick_url( url_map, fmt, js_url )
end
-- New-style parameters
if not path then
local stream_map = string.match( line, '\\"formats\\":%[(.-)%]' )
if stream_map then
-- FIXME: do this properly (see #24958)
stream_map = string.gsub( stream_map, '\\(["\\/])', '%1' )
else
stream_map = string.match( line, '"formats":%[(.-)%]' )
end
if stream_map then
vlc.msg.dbg( "Found new-style parameters for youtube video stream, parsing..." )
-- FIXME: do this properly (see #24958)
stream_map = string.gsub( stream_map, "\\u0026", "&" )
path = pick_stream( stream_map, js_url )
end
end
if not path then
-- If this is a live stream, the URL map will be empty
-- and we get the URL from this field instead
local hlsvp = string.match( line, '\\"hlsManifestUrl\\": *\\"(.-)\\"' )
or string.match( line, '"hlsManifestUrl":"(.-)"' )
if hlsvp then
hlsvp = string.gsub( hlsvp, "\\/", "/" )
path = hlsvp
end
end
end
end
if not path then
local video_id = get_url_param( vlc.path, "v" )
if video_id then
-- Passing no "el" parameter to /get_video_info seems to
-- let it default to "embedded", and both known values
-- of "embedded" and "detailpage" have historically been
-- wrong and failed for various restricted videos.
path = vlc.access.."://www.youtube.com/get_video_info?video_id="..video_id..copy_url_param( vlc.path, "fmt" )
-- The YouTube API output doesn't provide the URL to the
-- javascript code necessary to descramble URL signatures,
-- without which functionality can be seriously limited.
-- #18801 prevents us from using a subrequest to the API,
-- so we forward the URL this way.
if js_url then
path = path.."&jsurl="..vlc.strings.encode_uri_component( js_url )
end
vlc.msg.warn( "Couldn't extract video URL, falling back to alternate youtube API" )
end
end
if not path then
vlc.msg.err( "Couldn't extract youtube video URL, please check for updates to this script" )
return { }
end
if not arturl then
arturl = get_arturl()
end
return { { path = path; name = title; description = description; artist = artist; arturl = arturl } }
elseif string.match( vlc.path, "/get_video_info%?" ) then -- video info API
local line = vlc.read( 1024*1024 ) -- data is on one line only
if not line then
vlc.msg.err( "YouTube API output missing" )
return { }
end
local js_url = get_url_param( vlc.path, "jsurl" )
if js_url then
js_url= vlc.strings.decode_uri( js_url )
end
-- Classic parameters - out of use since early 2020
local fmt = get_url_param( vlc.path, "fmt" )
if not fmt then
local fmt_list = string.match( line, "&fmt_list=([^&]*)" )
if fmt_list then
fmt_list = vlc.strings.decode_uri( fmt_list )
fmt = get_fmt( fmt_list )
end
end
local url_map = string.match( line, "&url_encoded_fmt_stream_map=([^&]*)" )
if url_map then
vlc.msg.dbg( "Found classic parameters for youtube video stream, parsing..." )
url_map = vlc.strings.decode_uri( url_map )
path = pick_url( url_map, fmt, js_url )
end
-- New-style parameters
if not path then
local stream_map = string.match( line, '%%22formats%%22%%3A%%5B(.-)%%5D' )
if stream_map then
vlc.msg.dbg( "Found new-style parameters for youtube video stream, parsing..." )
stream_map = vlc.strings.decode_uri( stream_map )
-- FIXME: do this properly (see #24958)
stream_map = string.gsub( stream_map, "\\u0026", "&" )
path = pick_stream( stream_map, js_url )
end
end
if not path then
-- If this is a live stream, the URL map will be empty
-- and we get the URL from this field instead
local hlsvp = string.match( line, "%%22hlsManifestUrl%%22%%3A%%22(.-)%%22" )
if hlsvp then
hlsvp = vlc.strings.decode_uri( hlsvp )
path = hlsvp
end
end
if not path and get_url_param( vlc.path, "el" ) ~= "detailpage" then
-- Retry with the other known value for the "el" parameter;
-- either value has historically been wrong and failed for
-- some videos but not others.
local video_id = get_url_param( vlc.path, "video_id" )
if video_id then
path = vlc.access.."://www.youtube.com/get_video_info?video_id="..video_id.."&el=detailpage"..copy_url_param( vlc.path, "fmt" )..copy_url_param( vlc.path, "jsurl" )
vlc.msg.warn( "Couldn't extract video URL, retrying with alternate YouTube API parameters" )
end
end
if not path then
vlc.msg.err( "Couldn't extract youtube video URL, please check for updates to this script" )
return { }
end
local title = string.match( line, "%%22title%%22%%3A%%22(.-)%%22" )
if title then
title = string.gsub( title, "+", " " )
title = vlc.strings.decode_uri( title )
-- FIXME: do this properly (see #24958)
title = string.gsub( title, "\\u0026", "&" )
end
-- FIXME: description gets truncated if it contains a double quote
local description = string.match( line, "%%22shortDescription%%22%%3A%%22(.-)%%22" )
if description then
description = string.gsub( description, "+", " " )
description = vlc.strings.decode_uri( description )
-- FIXME: do this properly (see #24958)
description = string.gsub( description, '\\(["\\/])', '%1' )
description = string.gsub( description, '\\n', '\n' )
description = string.gsub( description, '\\r', '\r' )
description = string.gsub( description, "\\u0026", "&" )
end
local artist = string.match( line, "%%22author%%22%%3A%%22(.-)%%22" )
if artist then
artist = string.gsub( artist, "+", " " )
artist = vlc.strings.decode_uri( artist )
-- FIXME: do this properly (see #24958)
artist = string.gsub( artist, "\\u0026", "&" )
end
local arturl = string.match( line, "%%22playerMicroformatRenderer%%22%%3A%%7B%%22thumbnail%%22%%3A%%7B%%22thumbnails%%22%%3A%%5B%%7B%%22url%%22%%3A%%22(.-)%%22" )
if arturl then
arturl = vlc.strings.decode_uri( arturl )
end
return { { path = path, name = title, description = description, artist = artist, arturl = arturl } }
else -- Other supported URL formats
local video_id = string.match( vlc.path, "/[^/]+/([^?]*)" )
if not video_id then
vlc.msg.err( "Couldn't extract youtube video URL" )
return { }
end
return { { path = vlc.access.."://www.youtube.com/watch?v="..video_id..copy_url_param( vlc.path, "fmt" ) } }
end
end
![How to Create Barcodes in Excel Using Font IDAutomationHC39M [The Simple Way]](https://lh3.googleusercontent.com/blogger_img_proxy/AEn0k_tMqR7QQNiqWCl3_7v9WTSBmhvPgCELrdnKctj5eO8f5cbENrsBpD8g3oG7c2KCgGD-ua6C_QIq15iYI9pIk9d73CmubKKpkIxfhXysKB03DYlH6g=w680)
![How to VLC Media Player Youtube.lua [Error Solved 2020]](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhO_CTnEISrZYY07FoMwyb-gO85a8D8uu_YRA_I1S5D5UbPoxCUFTCQ0M8ghpVGmHmOUiypaCJ2ifrHKVW4UtjkOGRSUC0AHco07lD40Xlorjor6O4Sf7RxvB1z3GUZC-Ge-hqb_dcjHqU/w680/vlc-media-player-logo.jpg){kind=logo}
0 Comments