this post was submitted on 26 Nov 2025
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All you have to do is add a small traditional JPEG image at the start of the file. It doesn’t have to be high resolution or more than a couple of kb. The new format decoder would know this, and skip the traditional jpeg “header”, rendering the newer file format embedded in the image.
Would completely defeat the purpose of making a new smaller file format if we prefix if with the old format.
That would have been a brilliant move with wav vs MP3
If you’re really saving 20% in file size with XL, adding back a very compressed preview image that takes up one or two percent isn’t going to cost you much.