Slow header output

[hlstriker]

I'm trying to make a script to stream a flash video.

 

Everything works fine except the headers don't send until the script is done executing. This is bad because the script needs to throttle the bandwidth which makes the script load very slow.

 

Is there a way to force the headers to the client browser as soon as they are called in the script?

 

header("Content-Type: video/x-flv");
header("Content-Length: " . $fileSize);

SomeForceHeaderFunction();