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

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Discussion Overview

The discussion revolves around a method purportedly allowing users to save files as images on 4chan, specifically by renaming files and converting them to PNG format to retain hidden information. The scope includes technical exploration of file formats and potential applications of this method.

Discussion Character

  • Exploratory
  • Debate/contested
  • Technical explanation

Main Points Raised

  • Some participants propose that renaming files (e.g., .mp3 to .raw) and saving them as PNGs can retain useful information.
  • Others question the utility of this method, asking why one would not simply save files in their original format.
  • One participant argues that renaming a file does not alter its structure, suggesting that the original data cannot be recovered after conversion to PNG.
  • Another participant claims to have successfully converted a PNG back to an MP3, suggesting potential applications for hiding data.
  • Questions arise regarding whether the original PNG was genuinely an image, with skepticism about the feasibility of a file being both an image and an audio file.
  • Links to files are shared for testing the method, with instructions to use specific software for conversion.
  • One participant reports failure when attempting to reverse the process with their own MP3 files, indicating inconsistency in results.
  • Some participants express disdain for the source of the discussion, characterizing 4chan negatively.

Areas of Agreement / Disagreement

Participants express a mix of skepticism and curiosity regarding the proposed method. There is no consensus on its validity or usefulness, with multiple competing views presented.

Contextual Notes

Limitations include unresolved questions about file structure changes, the nature of the original files, and the effectiveness of the proposed method in reliably recovering original data.

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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