NConvert with latest plugins

Discussions on NConvert - the command line tool for image conversion and manipulation

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herb
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NConvert with latest plugins

Post by herb »

Hello Pierre,

I just installed XnViewMP 1.11.4. Thanks for this new version.
Looking into (sub)directory plugins I have seen that almost all *.dll files are enhanced to latest versions and openEXR files have another filename.

Can we have NConvert_unicode.exe that also works with these "new" plugins.

Thanks in advance.
Best regards
herb
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xnview
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Re: NConvert with latest plugins

Post by xnview »

could you try this version
Pierre.
herb
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Re: NConvert with latest plugins

Post by herb »

Hello Pierre,

thanks for the new version 7.240.
I started the tests, but please be aware I have not finished.

Here are 2 comments
- with gpr.dll also *.gpr files can be converted. Please add this dll to plugins
- *.exr file can be converted using the "old" dll files (with "3-2" in filename).
I hoped that the new version will be working with the enhanced exr dll file (with "3-4" in filename)

Thanks again
Best regards
herb
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xnview
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Re: NConvert with latest plugins

Post by xnview »

herb wrote: Wed Jul 01, 2026 11:06 am - *.exr file can be converted using the "old" dll files (with "3-2" in filename).
I hoped that the new version will be working with the enhanced exr dll file (with "3-4" in filename)
it doesnt work with latest exr dll?
Pierre.
herb
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Re: NConvert with latest plugins

Post by herb »

Hello Pierre,
xnview wrote: Wed Jul 01, 2026 11:23 am it doesnt work with latest exr dll?
For me the latest exr dll have all "3-4" in filename.
This was my mistake. Also Imath-3_2.dll (with "3-2" in filename) must be available.

So it works now for exr file.
I will continue my tests.

Best regards
herb
herb
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Joined: Sat Jul 18, 2009 3:19 pm

Re: NConvert with latest plugins

Post by herb »

Hallo Pierre,

during my test I found that XnViewMp 1.11.5 does not display all *.psd images and also NConvert 7.240 does not convert it to *.jpg
(see: viewtopic.php?t=50936).

I also found that NConvert does not convert *.ora images. The libora.dll is available plugins directory.
But XnViewMP 1.11.5 does display my testfile.

I get the following:
Error: Can't open file () ( 4 times)
I will send the testimage via mail.

Best regards
herb
herb
Posts: 297
Joined: Sat Jul 18, 2009 3:19 pm

Re: NConvert with latest plugins

Post by herb »

Hello Pierre,

Problems also occure with *.dds files.
They are converted properly - BUT NConvert does NOT send the message (to stderr)

Code: Select all

Converion of ... into ... OK

And also with *.xpm images.
NConvert gives the following error message:

Code: Select all

Error: This picture cannot be written using this format <path-to-jpg-image>
But XnViewMP does this file store in jpg format without any problems.

Best regards
herb
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xnview
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Re: NConvert with latest plugins

Post by xnview »

herb wrote: Fri Jul 03, 2026 12:34 pm I also found that NConvert does not convert *.ora images. The libora.dll is available plugins directory.
But XnViewMP 1.11.5 does display my testfile.
it works here, libora (295 936 bytes) from XnViewMP?
Problems also occure with *.dds files.
They are converted properly - BUT NConvert does NOT send the message (to stderr)

Code: Select all

Converion of ... into ... OK
always?
And also with *.xpm images.
NConvert gives the following error message:
which command line?
Pierre.
herb
Posts: 297
Joined: Sat Jul 18, 2009 3:19 pm

Re: NConvert with latest plugins

Post by herb »

Hello Pierre,

thanks for your quick reply and thanks for taking time looking into my problems.

(1) @ *.ora files
Here I have to say sorry. I regret, but it was an error in my application that caused the problem.

(2) @ *.dds files
It is hard to answer your question because my test-file collection contains only 1 *.dds image.
Please find this image attached.

(3) @ *.xpm files
I mostly use NConvert with my application. It uses the following generic commandline

Code: Select all

-ignore_errors -page 0 -overwrite -out jpeg -q 100 -o <path to outputfile without any space> <path to source file in quotes>
I hope my answers help a little bit.

Best regards
herb
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xnview
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Re: NConvert with latest plugins

Post by xnview »

please send me the xpm too?
Pierre.
herb
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Re: NConvert with latest plugins

Post by herb »

Hello Pierre,

attached please find my xpm testfile.

Best regards
herb
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xnview
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Re: NConvert with latest plugins

Post by xnview »

it's an indexed color picture, so you need -32bits
Pierre.
herb
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Re: NConvert with latest plugins

Post by herb »

Hello Pierre,

thanks for your analysis.

I thought it is an error in NConvert, because XnViewMP 1.11.5 and also IrfanView can read the image and store as *.jpg image.

Is there any chance that also NConvert can store it as jpg.
Please keep in mind that I am looking for a generic command to be used for all formats.
xnview wrote: Sun Jul 05, 2026 4:16 pmyou need -32bits
What does this mean in detail?
Is it option -32bits?
If yes, can this option be used as part of a generic command?

Best regards
herb
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xnview
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Re: NConvert with latest plugins

Post by xnview »

-32bits convert in RGB/RGBA the picture, the only problem is if you have a 8bits grey image
Pierre.
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xnview
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Re: NConvert with latest plugins

Post by xnview »

so no new problems?
Pierre.