convert 'avi' to '3gp'

1. How can I convert avi (or and any other video file) to 3gp in .net. Preferably in asp.net4.

2. If a site is blocked by name and IP by the ISP, is it possible to write a method to download files an开发者_如何学Pythond get the HTML of the site being blocked (rejected).

For the Part #1 of the question:

It depends what you mean by "convert". Both 3GP and AVI are wrapper formats, so are you merely trying to change the container format, or do you want to re-encode the streams as well? ****[Quoted]***

Please this Question for more details:

How to convert AVI to 3gp in C#?