Hello again,
So I make some test, a lots of test... I found some older version online such as 4.40, 4.58, 5.20 etc etc... to 10.04
I start to install, 4.40 to 8.20 in english, no sound problem
Since the 5.20 in french version, the downloader try to get the 10.28 version which is corrupted or doesn't work on my computer. Same on 6.30, 7.00, 8.20 in french only.
But in english it's working from 4.40 -> 8.20. After that, all video files sound don't edit after 10 sec...