Unlocking Hidden Data: How to Save Files as Images on 4chan

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Renaming files and converting them between formats can lead to unexpected results, as demonstrated by a method involving changing an .mp3 file to .raw, saving it as a PNG, and then converting it back. This process allows for the retrieval of the original file, which can be useful for hiding information. However, simply renaming a file does not alter its underlying structure, meaning that an .mp3 renamed to .raw remains an .mp3. Additionally, converting a RAW file to PNG results in the loss of image data, making it impossible to restore the original file completely. Despite these limitations, some users have successfully created files that function as both images and audio when processed correctly. The method raises questions about file manipulation and potential applications for data concealment.
SF
No one thought something useful could be learned on 4chan, until now.

http://orz.4chan.org/hr/res/381892.html

Apparently renaming a file (such as an .mp3) to .raw and then saving it (using IrfanView or Photoshop) to PNG will allow you to retain the useful information in the image file.

When converting the PNG back to RAW and renaming it to have the original extension, you'll get the original file.
 
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And why would that be useful? Why not just save it as its original file? Is it compressed more that way?
 
Well, that link is broken, so I can't comment on the source of your information. However, your description sounds like a pointless exercise.

Simply renaming a file does not change the file's structure -- "myfile.mp3" renamed as "myfile.raw" is still a mp3 file. Second problem, "RAW" files are uncompressed image files created by digital cameras. Once you convert a RAW file to PNG (or anything else) you have lost image data. Saving a PNG as "RAW" can't restore that lost data.
 
pantaz said:
Well, that link is broken, so I can't comment on the source of your information. However, your description sounds like a pointless exercise.

Simply renaming a file does not change the file's structure -- "myfile.mp3" renamed as "myfile.raw" is still a mp3 file. Second problem, "RAW" files are uncompressed image files created by digital cameras. Once you convert a RAW file to PNG (or anything else) you have lost image data. Saving a PNG as "RAW" can't restore that lost data.
Apparently it does.

I saved a PNG as .RAW, renamed it to MP3 and got an .mp3 of the Rick Roll.

Possible applications relate to hiding stuff.
 
Was the original png file really a picture? I'd certainly like to see a file which is both an image and can be played as an audio file.
 
http://www.mediafire.com/?n1b54zj5tgz .png
http://www.mediafire.com/?xbgdnt65v5z .tga

Open them with IrfanView or Photoshop and save them as .RAW, then rename to .MP3 so Winamp would play them.
 
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It works. But strangely, when I tried to do the reverse by taking one my own mp3 files and reversing the process and then applying this procedure the media player failed to play the decoded mp3 file.
 
Oh god, not 4Chan, the cesspool of the internet
 
vincentm said:
Oh god, not 4Chan, the cesspool of the internet

Ditto that!
 

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