Rotated .MOV file, weird behaviour

[Leo48]

On certain cameras, recording a MOV file in portrait orientation results in the video displaying tilt sideways. I have found a way to rotate these files (without buying QT Pro) maintaining the MOV format, with the free Kodak EasyShare software.
You load the file into EasyShare, rotate it and save it as newname.mov. The resulting file is only 1 to 5% smaller than the original, so almost lossless. Strange things happen, though. Loading the new file into QT, RealPLayer or Olympus Master 2, everything runs perfectly. But in VirtualDub (with QT plugin), AviDemux the same file shows sideways again, so processing it further seems impossible. Any explanation available? Help much appreciated.

[Midzuki]

I suppose your .MOV was not actually re-encoded ---
apparently, only part of its header/container~structure was re-written.

[Leo48]

I suppose your .MOV was not actually re-encoded ---
apparently, only part of its header/container~structure was re-written.

Thanks for your help.
So I am back to square one, rotate and save as .AVI as the only option?

[Midzuki]

You could use a simple Avisynth script to rotate the video
and re-encode with mencoder into a new .MOV file.

[Leo48]

You could use a simple Avisynth script to rotate the video
and re-encode with mencoder into a new .MOV file.

You forgot you are in the newbie section! ;o)
Sounds easy though. Will stock this post and reread it when I have grown up in video processing. Thank you.