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Lossless JPEG detected as Lossy #1252

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MarcusJohnson91 opened this issue May 4, 2020 · 5 comments
Open

Lossless JPEG detected as Lossy #1252

MarcusJohnson91 opened this issue May 4, 2020 · 5 comments
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@MarcusJohnson91
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Using the latest version of the Mac version of MediaInfo from the app store.

You can see the results in this Image

Lossless JPEGs use the following Start of Frame (SOF) markers: SOF3, SOF7, SOF11, SOF15 aka 0xFFC3, 0xFFC7, 0xFFCB, 0xFFCF, respectively.

the sof marker number is the only way to truly tell if an image is lossy or lossless.

the image that was misdetected as lossy can be found here
@JeromeMartinez
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Thanks, I fix that when I have some free time.

@JeromeMartinez
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I can give a pull

go :)

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@JeromeMartinez @MarcusJohnson91 and others