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A comment on Students are failing AP tests because the College Board can’t handle HEIC images. Parent comment

Re:Students are failing AP tests because the College Board c... by MattGaiser on Thursday May 21, 2020 @02:43PM (#23262998)
> why wouldn't changing the extension trigger the OS to convert the file?

If you change the extension on any operating system and then open it in the image viewer, it does appear to work. It doesn't as image viewers do not trust the file extension and ignore it, but there is no indication of that to the average user.

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Re:Students are failing AP tests because the College Board c... by cesarb on Thursday May 21, 2020 @04:45PM (#23264981)
> image viewers do not trust the file extension and ignore it

Not all of them; for instance, if I rename a .jpg to a .png exension and try to open it with Gnome's EOG, it presents an error saying "Not a PNG file", instead of showing the image.

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Re:Students are failing AP tests because the College Board c... by WillDaSilva on Thursday May 21, 2020 @07:27PM (#23266844)
A behaviour which I'm quite fond of, as it allows me to fix the file extensions. I generally don't like relying on the file extension for information, but it helps me keep my media collection clean in this case. It'd be ideal if it displayed the image anyway, while also displaying a warning message that says the extension doesn't match the actual file type.
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