Differences with HDR and how HDR10+ works…

The standard HDR technology adds up the static metadata to the content (*.MP4 video). This will mean that the parameters are applied at the beginning itself and continue throughout. This causes the bright scenes in a movie look too bright and lose detail, while the dark scenes would continue to look dim. In HDR10+ the brightness boundaries of the video clip is configured and changed in a frame by frame manner, the full-color range is added to every scene dynamically no matter whether it contains only dark or only light scenes.

In other words, HDR10+ ensures that you will end up getting the best details in your videos and images.

How an HDR10+ video is viewed on supported and non-HDR devices

There is a problem, when viewing an HDR10+ video on a device that does not support the HDR10+ standard, the video will be displayed as in the following image on the left (with washed-out colors), while on a Galaxy S10 smartphone or TV that supports HDR10+ you will see it as in the image on the right

So, to view an HDR10+ video on an unsupported device, we must first convert it to a video in SDR (standard dynamic range) which however must retains the same depth and intensity of colors, without washed-out colors, as the original HDR10+ video.

How to convert HDR10+ video to SDR on PC

To make the video conversion from HDR10+ to SDR is very simple on a Samsung Galaxy S10 smartphone, but in this article I will explain how to convert it on PC (otherwise, if you want to know how to convert it on Galaxy S10, read this from Samsung).

First of all, you need the ffmpeg software, a free command-line tool that converts audio or video formats; from this link http://ffmpeg.org/download.html look for “Get packages & executable files”, and download the compiled version for your OS (Linux, Windows or Mac).

Step 1 : Extract FFMPEG to a folder

Extract the contents of the zip file to a new folder in “C:\ffmpeg\” (this is a windows path, but you can change it at your convenience).

Step 2 : Create a Batch file and copy your HDR10+ video to convert

Create a new file named “convert.bat” in “C:\ffmpeg\bin” with the following code

C:\ffmpeg\bin\ffmpeg.exe -i video-input.mp4 -vf zscale=t=linear:npl=100,format=gbrpf32le,zscale=p=bt709,tonemap=tonemap=hable:desat=0,zscale=t=bt709:m=bt709:r=tv,format=yuv420p -c:v libx265 -crf 22 -preset medium -tune fastdecode video-output.mp4

Then, copy your HDR10+ video in “C:\ffmpeg\bin” and rename it in “video-input.mp4”

Step 3 : Open a command prompt and execute the batch

Now, press Windows button+R to open the “Run” box. Type “cmd” and click “OK” to open a regular Command Prompt. Finally, type “C:\ffmpeg\bin\convert.bat” to start the conversion from HDR10+ video to a new SDR video named “video-output.mp4”.

Conversion completed!

At the end of the conversion, you will find the new converted file in the “C:\ffmpeg\bin\” folder.

The new SDR file “video-output.mp4” can be viewed on all non-HDR devices, but with the same brightful colors as the original HDR10+ video.

Have fun converting your movies! 😀

The post How to convert HDR10+ videos to SDR (for non-HDR devices) first appeared on MaxVergelli.com.

$date1 = new DateTime('2020-01-01'); 
$date2 = new DateTime('2020-02-15'); 
print_r($date1->diff($date2));

And the output will be:

DateInterval Object ( 
  [y] => 0 
  [m] => 1 
  [d] => 14 
  [h] => 0 
  [i] => 0 
  [s] => 0 
  [f] => 0 
  [weekday] => 0 
  [weekday_behavior] => 0 
  [first_last_day_of] => 0 
  [invert] => 0 
  [days] => 45 
  [special_type] => 0 
  [special_amount] => 0 
  [have_weekday_relative] => 0 
  [have_special_relative] => 0 
)

The post Display the total number of days between two dates in PHP first appeared on MaxVergelli.com.

Function ConvertToUnixTimeStamp(input_datetime) 'As String 
  Dim d
  d = CDate(input_datetime) 
  ConvertToUnixTimeStamp = CStr(DateDiff("s", "01/01/1970 00:00:00", d)) 
End Function

Then, to get back the datetime from the Unix timestamp use the following code:

Function ConvertUnixTimeStampToDateTime(input_unix_timestamp) 'As String [regular datetime] 
  ConvertUnixTimeStampToDateTime = CStr(DateAdd("s", input_unix_timestamp, "01/01/1970 00:00:00")) 
End Function

The post Convert a DateTime string to a Unix timestamp in VbScript / Classic ASP first appeared on MaxVergelli.com.

Function Base64Encode(sText)
  Dim oXML, oNode
  Set oXML = CreateObject("Msxml2.DOMDocument.3.0")
  Set oNode = oXML.CreateElement("base64")
  oNode.dataType = "bin.base64"
  oNode.nodeTypedValue = Stream_StringToBinary(sText)
  Base64Encode = oNode.text
  Set oNode = Nothing
  Set oXML = Nothing
End Function

Function Base64Decode(ByVal vCode)
  Dim oXML, oNode
  Set oXML = CreateObject("Msxml2.DOMDocument.3.0")
  Set oNode = oXML.CreateElement("base64")
  oNode.dataType = "bin.base64"
  oNode.text = vCode
  Base64Decode = Stream_BinaryToString(oNode.nodeTypedValue)
  Set oNode = Nothing
  Set oXML = Nothing
End Function

Private Function Stream_StringToBinary(Text)
  Const adTypeText = 2
  Const adTypeBinary = 1
  Dim BinaryStream 'As New Stream
  Set BinaryStream = CreateObject("ADODB.Stream")
  BinaryStream.Type = adTypeText
  BinaryStream.CharSet = "us-ascii"
  BinaryStream.Open
  BinaryStream.WriteText Text
  BinaryStream.Position = 0
  BinaryStream.Type = adTypeBinary
  BinaryStream.Position = 0
  Stream_StringToBinary = BinaryStream.Read
  Set BinaryStream = Nothing
End Function

Private Function Stream_BinaryToString(Binary)
  Const adTypeText = 2
  Const adTypeBinary = 1
  Dim BinaryStream 'As New Stream
  Set BinaryStream = CreateObject("ADODB.Stream")
  BinaryStream.Type = adTypeBinary
  BinaryStream.Open
  BinaryStream.Write Binary
  BinaryStream.Position = 0
  BinaryStream.Type = adTypeText
  BinaryStream.CharSet = "us-ascii"
  Stream_BinaryToString = BinaryStream.ReadText
  Set BinaryStream = Nothing
End Function

The post Base64 encoding / decoding functions in VbScript / Classic ASP first appeared on MaxVergelli.com.

[sourcecode language=”vb”]
<!–#include file="AssociativeArrayClass.asp" –>
<%
Dim Person, God
Set Person = New AssociativeArray
Set God = New AssociativeArray
Person("name") = "Max"
Person("surname") = "Vergelli"
God("name") = "Jesus"
God("surname") = "Christ"
Dim World
Set World = New AssociativeArray
World(1) = Person
World(2) = God
response.Write World.ToXML()
%>
[/sourcecode]

And You will get out the following XML:

[sourcecode language=”xml”]
<?xml version="1.0" encoding="utf-8"?>
<array>
<key>
<name><![CDATA[1]]></name>
<value>
<key>
<name><![CDATA[name]]></name>
<value><![CDATA[Max]]></value>
</key>
<key>
<name><![CDATA[surname]]></name>
<value><![CDATA[Vergelli]]></value>
</key>
</value>
</key>
<key>
<name><![CDATA[2]]></name>
<value>
<key>
<name><![CDATA[name]]></name>
<value><![CDATA[Jesus]]></value>
</key>
<key>
<name><![CDATA[surname]]></name>
<value><![CDATA[Christ]]></value>
</key>
</value>
</key>
</array>
[/sourcecode]

The post How to export an ASP Associative Array to XML first appeared on MaxVergelli.com.

Right now, You can start declaring associative arrays in ASP with the following syntax:

[sourcecode language=”vb”]
Dim Person
Set Person = New AssociativeArray
Person("name") = "Max"
Person("surname") = "Vergelli"
Response.Write Person("name") & " " & Person("surname")
[/sourcecode]

In the above example, the key “name” in “Person” object, stores “Max” value. You can set strings or integers for the key and any object/variant type for the relative value. However, You can not set key with Null or “” strings like the following:

[sourcecode language=”vb”]
‘invalid keys…
Person(Null) = "Null Key"
Person("") = "Empty String"
Dim undefined
Person(undefined) = "Variable Not Initialized"
Response.Write Person("") & Person(Null) & Person(undefined)
[/sourcecode]

How to get every item of the associative array:
You can make a “For Each” loop on the array like in the following code

[sourcecode language=”vb”]
For Each element In Person.Items
   Response.Write element.Key & " : " & element.Value & vbCrLf
Next
[/sourcecode]

“Person.Items” gets all the items inside the associative array and for each item You can get “Key” and “Value” properties.

How to copy an associative array:

[sourcecode language=”vb”]
Dim Person_Clone             ‘it’s a Variant type
Set Person_Clone = Person    ‘NOTE: Use "Set" statement!
‘print values
Response.Write Person_Clone("name") & " " & Person_Clone("surname") & vbCrLf
‘get each key/value
For Each element In Person_Clone.Items
   Response.Write element.Key & " : " & element.Value & vbCrLf
Next
[/sourcecode]

How to create nested associative arrays…
You can create infinite nested associative arrays and accessing them like the following:

[sourcecode language=”vb”]
Dim Person
Set Person = New AssociativeArray
Person("name") = "Max"
Person("surname") = "Vergelli"
Dim People
Set People = New AssociativeArray
People(1) = Person
People(2) = Person
People(3) = Person
Response.Write People(1)("name") & " " & People(1)("surname")
[/sourcecode]

Besides, You can enumerate all the keys/values inside the “People” associative array object

[sourcecode language=”vb”]
For Each element In People.Items
   Dim el_person
   Set el_person = element.Value
   Response.Write el_person("name") & " : " & el_person("surname") & vbCrLf
Next
[/sourcecode]

The post How to use Associative Arrays in ASP first appeared on MaxVergelli.com.

It is possible also load in an associative-array the data coming from MySQL or MS Access databases, then You can programmatically manage the structured data; You can also export associative arrays to XML.

Associative arrays are usefull when it is necessary manage many variables at once (for example when we pass multiple values at once to a method/function) or just to store data in a well structured array and reusing  its values anytime.

The post VBScript Class to create easly Associative Arrays in ASP like in PHP first appeared on MaxVergelli.com.

The post Online JSON Validator first appeared on MaxVergelli.com.

[sourcecode language=”php”]
function datetime2mysqldatetime($datetime){ // ‘25.12.2010 12:10:00’ -> ‘2010-12-25 12:10:00’
return date(‘Y-m-d H:i:s’, strtotime($datetime)); // ‘25.12.2010’ -> ‘2010-12-25 00:00:00’
}

function mysqldatetime2datetime($mysql_datetime){ // ‘2010-12-25 12:10:00’ -> ‘25.12.2010 12:10:00’
$d = split(‘ ‘, $mysql_datetime); // ‘2010-12-25’ -> ‘25.12.2010’
if($d && count($d)>1){
list($year, $month, $day) = split(‘-‘, $d[0]);
list($hour, $minute, $second) = split(‘:’, $d[1]);
$d = date(‘d.m.Y H:i:s’, mktime($hour, $minute, $second, $month, $day, $year));}
else if($d && count($d)==1){
list($year, $month, $day) = split(‘-‘, $d[0]);
$d = date(‘d.m.Y’, mktime(0, 0, 0, $month, $day, $year));
} else {
$d = NULL;
}
return $d;
}
[/sourcecode]

Max 🙂

The post PHP Date or Datetime to MySQL Datetime and viceversa first appeared on MaxVergelli.com.

Happy encryption/decryption! 🙂

Max

[sourcecode language=”php”]
function encrypt($input_string, $key){
$iv_size = mcrypt_get_iv_size(MCRYPT_RIJNDAEL_256, MCRYPT_MODE_ECB);
$iv = mcrypt_create_iv($iv_size, MCRYPT_RAND);
$h_key = hash(‘sha256’, $key, TRUE);
return base64_encode(mcrypt_encrypt(MCRYPT_RIJNDAEL_256, $h_key, $input_string, MCRYPT_MODE_ECB, $iv));
}

function decrypt($encrypted_input_string, $key){
$iv_size = mcrypt_get_iv_size(MCRYPT_RIJNDAEL_256, MCRYPT_MODE_ECB);
$iv = mcrypt_create_iv($iv_size, MCRYPT_RAND);
$h_key = hash(‘sha256’, $key, TRUE);
return trim(mcrypt_decrypt(MCRYPT_RIJNDAEL_256, $h_key, base64_decode($encrypted_input_string), MCRYPT_MODE_ECB, $iv));
}
[/sourcecode]

The post Easy-to-use and strong Encrypt/Decrypt PHP functions first appeared on MaxVergelli.com.