XnView Software

Windows 10 home with all available updates applied.
XnView 2.40.
I have a number of mp4 files.
For some reason, some of them play, rotated 90 degrees to the left when using XnView 2.40.
The thumbnails look correct in XnView.
If I play them with other apps, they play correctly (Not rotated 90 degrees ...

Based on a string started by "FlyAway" on 5-7-11, I think I have my issue resolved.

Here's what I did (In case anyone else is experiencing this issue.)

Stopped XnView.
Did a search for and then downloaded "ffmpeg-20170724-03a9e6f-win64-static.zip" (to my pc) from https://www.ffmpeg.org/download ...

XnView Classic for Windows version 2.40.
Windows 10 home, with all available updates applied.

I just downloaded and install the XnView Classic app to my laptop.
I love it.
It has everything I want except that it will not play .mp4 files.

I am able to play the .mp4 files using a number of other ...