In MediaCoder, it is possible to change the ratio of a video without re-encoding it.
There is also a function to rotate a video, but not without re-encoding it.

However, many phones and other programs include this feature.
With MediaInfo installed on its system (Included in K-Lite Codec Pack), we then see the "Rotation" line among the various information of the video.

This allows you to rotate a video quickly and without loss of quality.
It is a shame to have to use another program to access this feature.
Could not we include it in a future version of MediaCoder?