multimedia stream from mysql database

I have a design using php/mysql. In mysql database i stored multimedia files

such as avi, mp3, as blob types. How can I stream such files using headers maybe, through an internet browser. I have available the binarydata, filename, filesize and filetype. Till now with: header("Content-type: $filetype"); the appropriate program is being lauched in the internet brower (IE) without

playing anything as the php file is being inserted in the appropriate program. What should I do?

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