Hapax a écrit:salut
il y a des tas d'outils qui font ça (même Movie Maker) ,mais souvent avec des conséquences désastreuses...(d'abord faire un essai avec une copie)
vois si cette solution ,avec VirtualDub,te convient : http://www.commentcamarche.net/faq/8022 ... -de-videos

Virtualdub can do this easily, but you have install plugins and such to get it to work with non-AVI files. Check the site's newbie forum for instructions.
Once you get it to work with your file format here's how to batch rotate:
Open Virtualdub.
Go to Video-->Fitlers, click Add filter, select the Rotate filter if you need 90 or 180 degree rotation, select Rotate2 if you need a custom angle. Click OK until you are back on the main window.
Go to Video, make sure full processing mode is selected (default).
Go to Video--> Compression... , select your compression method. Xvid is good, click configure to adjust quality/size if you want.
So now you have it setup to open, rotate and recompress your video. You just need to set up the batch jobs.
Go to File--> Queue Batch Operation-->Batch Wizard
Drag your videos to the window. Change the Output directory if you want. When you're finished click Add to Queue-->Re-save as AVI, that should clear the file window, click OK to get back to main window.
Go to File-->Job Control. Your jobs should be listed here. Click Start to begin the batch job.