I have trouble understanding file formats, or maybe I have figured it out. Please help me!
A file format is a specification that tells how the data of a file is arranged and thus how it is to be interpreted. Does this mean, for instance, that data arranged according to a JPEG (an image format and codec) will tell my computer that the data is to be interpreted as an image?
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Yes. But the rabbit hole goes a bit deeper. You can theoretically have the exact same image in PNG and JPEG file formats. In both cases you tell the computer that the file is to be interpreted as an image, but the data is arranged in wildly different manners.
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