transparency and v7.136

[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

transparent png file

alpha.png (1.04 KiB) Viewed 2710 times

When I use one of the previous versions of nconvert (v7.112, v7.99) the background is white as expected.

converted file without transparency and white background from nconvert 7.112

7.112 convert.jpg (2.19 KiB) Viewed 2710 times

when I convert the file with the latest version of nconvert (7.136) the background stays black.

converted file without transparency and black background from nconvert 7.136

7.136 convert.jpg (2.17 KiB) Viewed 2710 times

Is it a bug or is there something I'm not doing correctly? if so, thanks for any suggestion.

[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

[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