Request #49488

From:

felii

Account Type:

Paid Account

Dreamwidth:

Account Name:

felii

Style: (S2) core: public, layout: public, theme: public, user: custom

Email confirmed? Yes

cluster: 10

data version: 10

scheme: tropo-purple

Media storage used: 59.974 MB (4.0%)

Support category:

General/Unknown [Previous| Next]

Time posted:

Tue, 26 Nov 2024 17:43:32 GMT (42 weeks ago)

Status:

Open

Summary:

Is there a way to bypass JPEG compression for image sharing?

Original Request:

I would like to share images already compressed as JPEG. If I share an 800x800 168.KB JPEG (this: https://incohearent.dreamwidth.org/file/291547.jpg ) that is compressed using jpegli command line tool, which is the most modern JPEG compression method, it loads into dreamwidth as 93KB. In file list it says it is 171KB.

I understand that most people don't preprocess their high quality JPEGs, but I want to share images already optimized.

Diagnostics: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Goanna/6.7 Firefox/102.0 PaleMoon/33.4.1

In the source code, there is a perl script /cgi-bin/DW/Media/Photo.pm that I do believe is performing the lossy transformation on all JPEGs. From the note, it is necessary for all JPEGs to be rerendered so their EXIF orientation data can be reset. It's using the Perl implementation of Image Magick, and I understand that Image Magick cannot losslessly rotate JPEGs.

In the case of users who have already scaled down their JPEGs and removed EXIF data from their photography, and especially digital artists, it would be nice if there was a way to disable this JPEG rerendering from happening. I would love it if EXIF resetting for JPEG media could be disabled in the settings or in the admin console, if I am correct this is what is happening, by accident.

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