I'm looking to convert a whole bunch of HEIC files into PNGs so I can print them at a photo shop. I came up with a simple script that just changes the file extensions instead of using any special software. Here's the script I used:
`for f in *.HEIC; do mv -n "$f" ${f%.*}.png; done`
Surprisingly, this worked, and now I have PNG files that my printer can read. But I'm wondering, should I worry about losing any data in this conversion? Since HEIC and PNG formats are different, why did this method work just by changing the file name?
3 Answers
There's a catch with HEIC being a compressed format. Depending on how compressed your original files are, you might not notice much data loss through a simple rename, but over-compression can degrade quality, like detail and color depth. Remember that HEIC is also a lossy format, so data can be unrecoverable.
You're right in thinking HEIC and PNG have different data structures. Simply renaming the extension doesn’t change the actual contents of the file. Software can be tricked by the name, but specialized programs will still need a genuine PNG file to work properly. Just keep this in mind if you're planning to use the images commercially or for high-quality prints.
It's interesting that you found success with just renaming the files! However, I'd caution you. The internal structure of HEIC is quite different from PNG, so this method isn't a reliable conversion. Many programs can ignore the file extension, but those that require proper PNG format might not open the files. Have you tested by printing any of them? If you haven't yet, I recommend checking out ImageMagick for a proper bulk conversion; it'll ensure you don’t lose quality.
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