Here is a trick to overcome the limitations of modern mobile browsers which are o-so-reluctant to to unify their standards for the benefit of consumers and programmers. It appears that those browsers do not mind playing MP3 in video controls, so here you go:
function playVid() {
var myems = document.getElementsByTagName("em");
for (var i = 0; i < myems.length; i++) {
var myem = myems[i];
var myemid = myem.id;
myem.onclick = function () {
var video = document.getElementById('video1');
sndfile = this.id + ".mp3";
video1.src = sndfile;
video.load();
video.play();}
}
}
The function loops through EM element IDs and plays MP3 files in onclick event. Place this function in body onload event.
Place a video element somewhere in a tucked away location on your web page and set its width and height to 1px.
<video id="video1" width="1" height="1" > <source src=""/></video>
You can see this code in action on this interactive transcript page
Coding Bits and Bites
Sharing code snippets in VB.NET, javascript, XML DOM, XSLT, Regular expressions with webmasters and programmers.
Friday, August 26, 2016
Playing MP3 files in Dolphin and other mobile browsers
SRT To Text Online Converter
SRT To Text Online Converter is a useful tool for those who want to take advantage of the closed caption information provided by YouTube to create a transcript of a video. This free online converter does not require any software installations.
To create a transcript for your video, you need to download closed caption information from YouTube and then follow these easy steps
To create a transcript for your video, you need to download closed caption information from YouTube and then follow these easy steps
- Copy the URL of your video in YouTube and follow this link to create and download the raw SRT file of your video.
- Open your downloaded SRT file in Notepad and copy its entire contents to clipboard (maximum character size: 5000)
- Follow this link to create transcript.
- Once you have finished, you can fine tune your transcript file. Transcript stripped of stopwords can be useful to make a list of keywords to optimize your video for search engines or in the "Description" field on Youtube Video Manager page or video webpage on your website.
- You can also create a list of most frequent words that occur in your transcript for search engines optimization.
And this is free online tool to extract keywords from a webpage:
Regular expressions to match spaces, whole words and words with flexions
Regular expressions can be very useful but also very tricky. Here are a few ones that have been tested in my VB.NET web applications.
"\b\.?\s+" & yourword & "\b\s+"
\b\ stands for word boundary
\s+ stands for one or more spaces
Here is an improved regular expression without word boundaries that also looks for optional punctuation marks:
"([\.!?]?\s+" & yourword & "\s+)"
The optional group is enclosed in brackets, without them the group becomes mandatory.
Regular expression to match whole words surrounded by spaces
"\b\.?\s+" & yourword & "\b\s+"
\b\ stands for word boundary
\s+ stands for one or more spaces
Here is an improved regular expression without word boundaries that also looks for optional punctuation marks:
"([\.!?]?\s+" & yourword & "\s+)"
The optional group is enclosed in brackets, without them the group becomes mandatory.
Regular expression to match words with flexions
"((?i)\s+" & yourword & "[en|e|er|s|es\b]{0,}[\.\,!?]?\s+)"
?i sets ignore case
en|e|er|s|es\b sets word flexions before word boundary
{0,} gets all forms
[\.\,!?] optional punctuation after word boundary
\s+ mandatory space
Please let me know how it works in your applications.
Extract specific number of words from string
The following function is useful where there is a need to display a snippet of text. Tested in real life VB.NET application.
Function GetNewString(ByVal mystr As String) As String
Dim finStr As String = ""
Dim count As Integer
Dim words1() As String
Dim strSeparator As Char = (" ")
words1 = mystr.Split(strSeparator)
If words1.Length - 1 < 10 Then
For count = 0 To words1.Length - 1
finStr &= words1(count) & " "
Next
Else
For count = 0 To 10
finStr &= words1(count) & " "
Next
End If
Return finStr
End Function
The function returns 10 words from a string that is passed as a string parameter.
Function GetNewString(ByVal mystr As String) As String
Dim finStr As String = ""
Dim count As Integer
Dim words1() As String
Dim strSeparator As Char = (" ")
words1 = mystr.Split(strSeparator)
If words1.Length - 1 < 10 Then
For count = 0 To words1.Length - 1
finStr &= words1(count) & " "
Next
Else
For count = 0 To 10
finStr &= words1(count) & " "
Next
End If
Return finStr
End Function
The function returns 10 words from a string that is passed as a string parameter.
Add onkeypress event to server control
Suppose you need to use a client side function when the enter key is pressed in a a server control. This is how it can be done with a few lines of javascript code:
function handle(e) {
if (e.keyCode === 13) {
var linkUrl = document.getElementById("txtLinkUrl").value;
var linktext = document.getElementById("txtLinkText").value;
var mylink = "<a href='" + linkUrl + "'>" + linktext + "</a>";
var txtWriteValue = document.getElementById("txtWrite").value;
document.getElementById("txtWrite").value = txtWriteValue + " " + mylink;
document.getElementById("lblActive").innerText = txtWriteValue + " " + mylink;
}
return false;
}
The function converts values from two textboxes into a hyperlink. The event handler is added as an attribute to a server control where the enter key is pressed:
txtWrite.Attributes.Add("onkeypress", "handle(event)")
This function does not perform any error checking, so you need to customize it to be more robust.
function handle(e) {
if (e.keyCode === 13) {
var linkUrl = document.getElementById("txtLinkUrl").value;
var linktext = document.getElementById("txtLinkText").value;
var mylink = "<a href='" + linkUrl + "'>" + linktext + "</a>";
var txtWriteValue = document.getElementById("txtWrite").value;
document.getElementById("txtWrite").value = txtWriteValue + " " + mylink;
document.getElementById("lblActive").innerText = txtWriteValue + " " + mylink;
}
return false;
}
The function converts values from two textboxes into a hyperlink. The event handler is added as an attribute to a server control where the enter key is pressed:
txtWrite.Attributes.Add("onkeypress", "handle(event)")
This function does not perform any error checking, so you need to customize it to be more robust.
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