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Introduction

I searched the internet for a program to convert the image files to the OTA file format, but there was none!!! So, I began researching for OTA file format details... finally, I wrote a program with C# to do this...

The source code and binary files are ready for download...

The main logic of this program is an algorithm for converting images. Mobile picture messages (OTA or OTB files) have a standard size: 72x28. First of all we must create a file (*.ota) and then write 4 standard bytes into it.

byte0 -> 0000 0000 (0)
byte1 -> 0100 1000 (72)
byte2 -> 0001 1100 (28)
byte3 -> 0000 0001 (1)

Now read image, pixel by pixel, from left to right and top to bottom, every 8 pixel makes a byte for writing to the file:

black pixels = 0
Other pixels = 1

An image with size 72x28:

has 72*28 = 2016 (bits)
every 8 bits = 1 byte => 2016 / 8 = 252
and 252(bytes) + 4(standard bytes) = 256 bytes

Finally, the file size is 256 bytes.

Download and read my source code to see this program working...

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Generalwant a program in java to convert .jpg image into .ota format Pin
shoaib_bagwan		23:50 8 Sep '09  
Generalhi, Pin
prashant.patel31@gmail.com		3:22 13 Apr '09  
GeneralRe: hi, Pin
musyab		22:10 17 Apr '09  
GeneralHello Sir Pin
oviyaa		19:03 16 Feb '09  
QuestionHow to send pic msgs (.ota) By Nokia E51 ? Pin
undead_fred		3:45 11 Nov '08  
AnswerRe: How to send pic msgs (.ota) By Nokia E51 ? Pin
Alireza Naghizadeh		5:18 11 Nov '08  
GeneralTrouble with creating picture msg with my n70 Pin
Nikhil Dhotre		7:44 15 Jul '08  
GeneralRegarding OTA Pin
Muthuganesh		2:44 12 Jul '08  
GeneralSending OTA file via SMPP protocol to NOKIA SMSC Pin
Iftee		3:51 17 Jan '08  
GeneralAbout OTA file Pin
Ta Hoang Van		15:58 9 Jan '08  
GeneralRe: About OTA file Pin
venki_pandi		23:57 3 Feb '08  
GeneralNeed more idea Pin
tykea_khy		17:38 11 Dec '07  
GeneralSend Picture SMS as 1 SMS ( instead of conventional 3 SMS) Pin
Night Safari		23:33 3 Nov '07  
GeneralRe: Send Picture SMS as 1 SMS ( instead of conventional 3 SMS) Pin
style of worlds		22:12 19 Jan '08  
GeneralFor this .OTAfile i have to instal any software in my mobile? Pin
Narendra Mahalik		2:56 24 Aug '07  
GeneralRe: For this .OTAfile i have to instal any software in my mobile? Pin
Alireza Naghizadeh		5:48 9 Sep '07  
Generalhow to send image ? Pin
Shakeel Mumtaz		19:58 10 Jun '07  
GeneralRe: how to send image ? Pin
adnaneco		20:13 18 Apr '09  
GeneralRe: how to send image ? Pin
Shakeel Mumtaz		20:47 19 Apr '09  
GeneralRe: how to send image ? Pin
adnaneco		3:54 20 Apr '09  
GeneralPicture message Pin
teznin		2:14 5 Jan '07  
AnswerRe: Picture message Pin
Alireza Naghizadeh		19:26 6 Jan '07  
GeneralAbout This Program Pin
pouriia		11:03 28 Mar '06  
GeneralWant Details abt OTA file format Pin
imran_3jan		20:14 15 Mar '06  
GeneralRe: Want Details abt OTA file format [modified] Pin
basudekrishna		20:37 28 May '06  
Last Visit: 14:44 22 Nov '09     Last Update: 14:44 22 Nov '09 12 Next »


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