I am sending the file now.
Since then I changed computer and wanted to wait to see if this would cure the problem.
Unfortunately it did not.
I now have Vista Home Premium French
I am using Klite codec pack
The problem seem to have worsten (sp) as the video seems to play faster now.
I am sending the original file and a small trimmed section of it.
I send it to your support address of solveigmm.com
I tried the shareware video trimmer, but it does the same.
Thanks for your help