transparency and v7.136

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neko
Posts: 2
Joined: Fri Jan 27, 2023 3:10 pm

transparency and v7.136

Post by neko »

Hi,
I'm having a problem with the new version.
NConvert 7.136

I want to transform a transparent png into a jpg with white background. I'm removing the alpha/transparency with -merge_alpha -truecolours and I'm setting the color of the background with -bgcolor 255 255 255.

Code: Select all

nconvert.exe -merge_alpha -truecolours -bgcolor 255 255 255 -out jpeg -o convert.jpg  alpha.png
alpha.png
When I use one of the previous versions of nconvert (v7.112, v7.99) the background is white as expected.
7.112 convert.jpg
when I convert the file with the latest version of nconvert (7.136) the background stays black.
7.136 convert.jpg

Is it a bug or is there something I'm not doing correctly? if so, thanks for any suggestion.
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xnview
Author of XnView
Posts: 43897
Joined: Mon Oct 13, 2003 7:31 am
Location: France

Re: transparency and v7.136

Post by xnview »

yes there is a change in .136, when converting 8bits with transparency with -truecolors, the result is RGBA picture
Please try

Code: Select all

-transpcolor 255 255 255 -truecolours -merge_alpha -out jpeg
Pierre.
neko
Posts: 2
Joined: Fri Jan 27, 2023 3:10 pm

Re: transparency and v7.136

Post by neko »

Yes it's OK now.
I've got to check if it'll work with WEBP files, but that's for an other day ;-)
Thanks Pierre