Do you know some way that the videos automatically converts to flv and 3gp when upload them to the server?

For example, you upload a called video X.avi/wma and automatically converts to X.flv and X.3gp. Each one of these videos would automatically be copied to their folder:

-flvideo/X.flv
-3gpvideo/X .3gp

This would be good to be able to download movies directly to the mobile.

They could also convert manually the videos to the format 3gp and to upload them to their folder in the server. Then it would only be necessary to put a link in the view video page to be able to download it. Logically, the video that is shown in flv should be the same one that is downloaded to the mobile.

Somebody knows something about this topic?