The VideoLAN Forums

So, it works fine?

Yes

After some more testing: It might be a user error. I noticed the wrong videos are all filmed from top-down perspective. In that position the smartphone sensor changes display orientation very easily. The orientation of the video is set when you start filming. Other players like Windows Media Player ...

I have the same problem on my PC (Win7 x64). Some of my Smartphone (xperia z3) mp4 videos are playing vertical, others are correct horizontal. This happens ONLY in VLC. Windows Media Player and ZoomPlayer are playing ALL files correct! All VLC-transform-effects are disabled. If I enable "rotate...