How to convert transparent backgrounds to black color backgrounds?

[xinni]

Hello my helping friends

I'm trying to batch convert some pngs with transparent background to jpeg format with black background color, but XNViewMP only converts them to white background files.

I only found this posting, which is from 2018, telling me, there might be an option to select the background color, but I don't know all the terminology to find that specific option.

I asked chat-gpt too, but after 20 minutes of hallucinating answers, I did not had a solution.

I think this must be too simple so I cannot find it...

[user0]

if you convert:
- 32bit image - run as is
- indexed - also enable "Transparent color" action (any color/any tolerance, no idea why )

batch_convert_to_24bit.png

[cday]

I'm trying to batch convert some pngs with transparent background to JPEG format with black background color...

... then set Output tab format to JPEG with your desired saving settings.