XnView Software

XnView: MP 0.96.4 - 64 bit
OS: Windows 10 64bit

Video files with embedded rotation tag (for example, after using exiftool -rotate) are shown as rotated wrong way.

As an example, see this file: www.kostrom.spb.ru/FILES/P1620409.MP4
It is shown correctly in Firefox, Chrome, Windows Media Player, and MPC-HC.
But XnView MP shows it upside down.

Thanks to your detailed description I can reproduce

you can try installed windows codec by changing xnview.ini

Is it a bug inherited from QtAV?

I see there is a similar issue "Video thumbnail rotation" possibly due to the delay to get the metadata / need to go through a number of frames before accessing them.

Topic duplicate with this one "Wrong video orientation" viewtopic.php?f=96&t=39439