Is there any Plugin compatible to unity that allows me to inscribe meta data into a file?

Question

I'm trying to manipulate the meta data of an Image, so i can compress and decompress it without losing information, I can already read the image meta data, but I can't actually edit them.

I found this similar question: How to set extended file properties? But it doesn't seem to work today, as it is pretty old.

Edit: The project is for IOS and Android.

Answer 1

I managed to use SharpZipLib in unity: https://www.nuget.org/packages/SharpZipLib/ and compress the image to a zip:

using System.IO.Compression;

private string CompressImage(string picturePersistentPath)
{
    string pictureCompressedPath = Path.Combine(Application.persistentDataPath, "Compressed.zip");
        
    using FileStream originalFileStream = File.Open(picturePersistentPath, FileMode.Open);
    using FileStream compressedFileStream = File.Create(pictureCompressedPath);
    using var compressor = new GZipStream(compressedFileStream, CompressionMode.Compress);
    originalFileStream.CopyTo(compressor);

    return pictureCompressedPath;
}