how to reduce file size without making it a zip file

Harsh Gour

I want to reduce file size and store it in the root folder ex. if I upload a user image from IFromFile then there should be two files stored first the original one and the other one compressed I have tried GZip but it is producing zero byte file size

2 Replies

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Marvin Reid2y ago
Accepted answer
You can use the RasterCodecs class to apply Jpeg compression which is a common way to reduce file size. One can manipulate the Q Factor to determine the degree of loss applied from the compression. For a higher compression ratio, you can set the QualityFactor to a bigger number. For less compression you can keep it at 2. Here is an example:
```
            using (RasterCodecs codecs = new RasterCodecs()) 
            { 
               RasterImage image = codecs.Load(@"input file path"); 
               codecs.Options.Jpeg.Save.QualityFactor = 2; // Where 2 is the highest quality image
               codecs.Save(image, @"output file path ", RasterImageFormat.Jpeg, 0); 
            }
```
https://www.leadtools.com/help/sdk/main/api/file-formats-jpeg-and-lead-compressed-jpg-j2k-jp2-jpm-jls-cmp-and-cmw.html
https://www.leadtools.com/help/sdk/v22/dh/co/codecsjpegsaveoptions-qualityfactor.html

Amit Mohanty2y ago

You can use a ImageSharp library to reduce file size. Check the below example.
First, make sure you have ImageSharp installed.
Then you can create a method to compress and save the uploaded image.

using SixLabors.ImageSharp.Formats.Jpeg;

namespace YourNamespace
{
    public class ImageService
    {
        public async Task CompressAndSaveImageAsync(IFormFile imageFile, string outputPath, int quality = 75)
        {
            using var imageStream = imageFile.OpenReadStream();
            using var image = Image.Load(imageStream);
            var encoder = new JpegEncoder
            {
                Quality = quality, // Adjust this value for desired compression quality
            };

            await Task.Run(() => image.Save(outputPath, encoder));
        }
    }
}

Now in your code call the CompressAndSaveImageAsync method to process and save the compressed image:

public async Task UploadImage(IFormFile imageFile)
{
    if (imageFile == null || imageFile.Length == 0)
    {
        return BadRequest("No file uploaded");
    }

    // Save the file as compressed
    var outputPath = ;
    var imageService = new ImageService();
    await imageService.CompressAndSaveImageAsync(imageFile, outputPath, 30);

    // Save the original file
    var originalFilePath = ;
    using (var fileStream = new FileStream(originalFilePath, FileMode.Create))
    {
        await imageFile.CopyToAsync(fileStream);
    }

    return Ok("Image uploaded and compressed.");
}