Comment on There are basically 4 types of files : text, image, audio and audio visual, right ?

• MoonManKipper@lemmy.world ⁨2⁩ ⁨weeks⁩ ago

  Depends on the file format. There is compressed and uncompressed audio - some times the numbers just represent the audio waveform (e.g. .wav) - some times with lossy lossless compression. Most, but not all, video formats are compressed due to the data size

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• gandalf_der_12te@feddit.org ⁨2⁩ ⁨weeks⁩ ago

  an image, technically, is an array of pixels. specifically a 2-dimensional array. this means, it’s just a long list of lists of pixels. so if you have a 1920x1080 image, it’s just a list of 1080 lists of 1920 pixels each.

  each pixel, again, is a tuple (i.e. a list with fixed length) of numbers which specify the brightness of red / green / blue lamp. so if you want to display a yellow pixel, the data would be (1.0, 1.0, 0.0) which turns red and green on and blue off.

  so if you have a 1920x1080 image, technically you have 192010803 ≈ 6 million numbers. each number takes 32-bit, you can read it here

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• fbr@lemmy.dbzer0.com ⁨2⁩ ⁨weeks⁩ ago

  It’s pretty hard to break file types into these discrete categories. Images can be raw pixel colours (see ppm), losslessly compressed pixel data (see png), or lossily compressed pixel data (see jpeg).

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• iturnedintoanewt@lemmy.world ⁨2⁩ ⁨weeks⁩ ago

  There’s as many files as applications use. But just to make a point following your reasoning, you should include CAD, sliced and blender files at least to cover 3D objects.

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