Missing thumbnails for .m2ts files

[KrisR]

Hi,
When I used XnView v2.04 earlier this automn, thumbnails would be generated for HD video files with the .m2ts extension.
However, after installing v2.05 last month, those thumbnails are not generated any more. Same is now the case with
my newly installed v2.13.
For .mpg and HD .wmv files, thumbnails are displayed OK.

What is the problem?

[xnview]

you have not changed your codecs?

[KrisR]

No, not to my knowledge anyway.
Is there a particular codec that is missing and that I should look for?
Anyway, when I click on the missing thumbnail in the browser pane, the .m2ts file is played OK. So there must be some codec somewhere.

I also notice that Windows Explorer does produce thumbnails for .m2ts files.
Also XnView MP v0.61 produces thumbnails OK for .m2ts files.

Kristen

[xnview]

If you reinstall 2.04, do you have thumbnails?

[KrisR]

No. Indeed when I reinstall 2.04 it produces no .m2ts thumbnails any more.
It indicates perhaps that something has changed on my computer. (E.g. I always keep it up-to-date from Windows update).
But what?
Where should I start looking?

Another strange thing: I have folder with several .mov files. A thumbnail is generated for the first of them but not the rest. Why?

What does XnView need in order to generate .m2ts thumbnails?

KrisR

[xnview]

What does XnView need in order to generate .m2ts thumbnails?

A directShow decoder, like in Klite codec pack