XnViewMP 0.97.1 - batch conversion - slower than previous version 0.97

[masterjp]

I often use the batch conversion with different folders and use the 'skip' output file setting, if the output file already exists.
Sometimes there are only a few new files in the source folder, which I want to convert.

The batch conversion process is much slower than in previous versions of XnViewMP (0.96, 0.97).
Sometimes it also look like XnViewMP is freezing. If I use the "overwrite" output file setting, it is much faster.

Here you can find my settings:

xnv2.png

xnv1.png

[xnview]

strange nothing has changed between 0.97.0 & 0.97.1

[masterjp]

The first step, the analysing phase, is slow. The previous XnViewMP was much faster in this phase.

[xnview]

Thanks to your detailed description I can reproduce the problem.
Relate to issue 1856

[masterjp]

Fantastic. You found the reason for the performance problem. Thank you!

[jprzybys]

Dear Pierre

I have similar problem on Windows 10 and XnViewMP 0.97 - batch conversion takes minutes vs. seconds. Could you help me understand how to solve it?

Example - I started batch resize of 17 jpg impages each around 1.5-2MB and it estimates the time to 40+ minutes!

batch_convert.PNG

Best regards
Jarek

[cday]

Thanks to your detailed description I can reproduce the problem.
Relate to issue 1856

Pierre has identified the cause and it will be fixed in the next version 0.97.2, when it is released probably sometime in the next few weeks...

[masterjp]

You can use XnConvert from this website, which has the same batch conversion mode and functions.
It use multi-threading, too.

[xnview]

This problem is supposed to be fixed in XnView MP 0.98.0. Please check and confirm the bug fix here.