I made a couple of videos in portrait mode, so they're on their side.
I thought I'd find it easy to rotate them upright, but despite lots of Googling and experimenting, I still have problems.
I'm using Avidemux. I've managed to turn the picture upright, but two problems happen:
- The picture is jerky, as though a number of frames have been cut out.
- Avidemux adds its own subtitle to the front; as the clip is only a few seconds long, it interferes with what's being shown.
I wonder if someone can tell me how to simply turn the picture upright (90 degrees) without changing the frame rate or quality, and without adding any subtitles?
My videos were recorded as MP4 (mpeg-4).
I'd prefer to use a GUI, if possible, but I'll use a command line if necessary.
My system: Hardy 8.04
Avidemux version 2.4.1