libavcodec and php

Question

Hello,

I see here an c example of libavcodec http://cekirdek.pardus.org.tr/~ismail/ffmpeg-docs/api-example_8c-source.html This is encoding/decoding audio and video (frame by frame). I intend to something like this but in php.

I want to convert a video in same time of uploading. Ex: User upload a 100mb video. When server receive first data, it convert and then wait for upload to go on, and so on.

Can someone help me ? Thank you