https://bugs.documentfoundation.org/show_bug.cgi?id=101458
--- Comment #4 from Danny <[email protected]> ---
>I don't know if png should be recompressed.
I guess that is the key question. But in my use case (many slides with a lot of
embedded png and svgs) I assumed that keeping the Impress file high quality and
future proof validated not converting every single image to jpg (if there is a
global option to do this, whatever pdf export is doing would be less important)
For distribution to others, an export to lower quality pdf is very useful. And
I assumed that is what this option is there for. And if there is an option that
says it will recompress images in a lossy format I expect it to do exactly
that....
On average my files are 5-10x bigger compared to last year.
For very small images I agree that png or jpg does not matter much (and png is
probably better). But simply ignoring png when selecting I want a lossy pdf
does not sound right either. It seems the patch you linked is related to bug
97662.
I do not completely understand your test result (in my case, it seemed selected
lossy did not do anything). So I am curious if you could do a check with
pdfimages.
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