Image,Video, Audio effect and manipulation in web pages

Using jquery libary we can create daynamic effects on webpages eg:slide show,drag and drop,color picker etc..

http://www.jquery.com

For changing video and audio format of uploded file in sever we can use ffmpeg

http://www.howto-pages.org/ffmpeg/

php gd library is used for Image processing like water mark,cropping image,drawing images etc..

http://www.in.php.net/manual/en/book.image.php

Video players in we pages (FLV,mpeg etc..) http://www.freevideocoding.com/