How Read/Access binary of files like(.MP4, .ISO , .MP3 etc) in visual basic

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As anyone knows that computer working on binary (0s and 1s).
Every file/data have its binary source.
I want to Read/Access and edit binary of data/files like(.MP4 , .MP3, .ISO etc) in visual basic.
How can is do that?

Posted 21-Jan-13 5:56am

Alamgirable

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OriginalGriff · Accepted Answer · 2013-01-21T06:17:00

Solution 1

There are a huge number of ways: the simplest is:

VB

Dim data As Byte() = File.ReadAllBytes("D:\Temp\MyVideo.mp4")
data(0) = CByte(&Hff)
File.WriteAllBytes("D:\Temp\MyModifiedVideo.mp4", bytes)

But don't expect the file to work if you do exactly that! :laugh:

Posted 21-Jan-13 6:17am

OriginalGriff

Comments

Valery Possoz 21-Jan-13 16:42pm

For what ever reasons I think he want 0s and 1s... What about adding Dim bits As New BitArray(data)?
5 anyway :)

Alamgirable 22-Jan-13 7:57am

Can you plz tell me how to call its binary data.
For example:After opening file using your above given method i want to make first binary value to equal 11 or 00.
Like this:
for example the first binary value of ("D:\Temp\MyVideo.mp4")is 1 or 0 i want to make it equal 11 or 00.

OriginalGriff 22-Jan-13 8:08am

Soory - pleas etry to explain that a little better, perhaps with an example showing byte values.
If you want to replace a byte &H01 with a byte &H11 or &H03 that is easy - but your comment implies you might be trying to insert a single bit in the entire file, which is a lot harder! (And will wreck the file as far as it still being a valid video is concerned)

Alamgirable 22-Jan-13 9:12am

Actually i want to edit the binary file and then compress it using algorithm.
Sorry for bad english.

OriginalGriff 22-Jan-13 9:21am

You probably don't want to treat it as binary data - that will likely be far too slow - bytes are the "natural" size of most algorithmic compression as they are far, far easier to work with (or you might want to work with the hardware's true natural unit (32 or 64 bits) for speed.

Be aware that MP4 and MP3 and so forth are already compressed data formats, and you are unlikely to gain much in compression (unless you have a new, wonder algorithm, in which case sell it to someone big for serious amounts of money!)

Alamgirable 22-Jan-13 9:26am

OK,Above you said that "If you want to replace a byte &H01 with a byte &H11 or &H03 that is easy" then tell me how can i replace byte.
Plzzzzz show me it with coding example.

OriginalGriff 22-Jan-13 9:31am

Look at the code in my original answer - it replaces the value in the first byte (byte zero) with the hexadecimal value FF (or decimal 255)

Alamgirable 22-Jan-13 9:35am

How can i change (byte zero) with the binary (Mean FF = 1 OR 0)

OriginalGriff 22-Jan-13 9:46am

You are joking, right?
data(0) = 0
Or
Data(0) = 1

Alamgirable 22-Jan-13 11:12am

I,m not joking.Actually i'm 15 year old boy and i'm new in computer programming.
Thanks.

OriginalGriff 22-Jan-13 11:51am

Even if you're 15, you are expected to think and apply what you are shown to your own problem.
It's not exactly a massive stretch from my original code to the revised version, is it? :laugh: