Questions to specific *.mng images

[herb]

Hello Pierre,

I use NConvert 7.221_unicode on my Windows 10 system

I have 2 *.mng images which will not be converted into jpg format.
The command which my application uses

Code: Select all

nconvert.exe -ignore_errors -page 0 -overwrite -out jpeg -q 100 -o <out-image> <image>

(1)
For attached image australia1.mng I get the error

This picture cannot be written using this format

(2)
For attached image pnglogo.mng I get

Don't know how to read this picture

Do I need additional or other options for conversion into jpg?

Thanks for your help in advance
Best regards
herb

[SAMSAM]

Try, via the -xall command to Tif format (it worked for me). It really didn't work in JPG format