When you say you have its signature are you referring to the first 4 bytes, the "magic string" of the file? If you can view it whatever's opening it can obviously figure out what it is...bcrew1375 said:What would be the best way to go about deciphering a file format that there is no information on? I know the file is an image file, I know where the signature is, and I know where the width and height of the image are. How can I find some more info on this format? I have a way of viewing the image and I can use a hex editor . I could just go through the file changing every byte and seeing how it affects the image, but is there another way I could do it to make it easier?
Tell us more about it, ie if you do have the magic string tell us that, also tell us its width/height vs. size and what the image looks like (save it as something else maybe and post it) so we can get a good idea of dimensions vs. overall size so we can try to see how compressed it is (if at all).