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From János Löbb <janos.l...@yale.edu>
Subject Re: [users@httpd] http video streaming
Date Thu, 10 Dec 2009 21:44:51 GMT

On Dec 10, 2009, at 3:48 PM, André Warnier wrote:

> Ted Byers wrote:
>> Presently running Apache's httpd v 2.2.9 on Windows Server (and  
>> also on XP,
>> but my tests in question were run on the server).
>> I have attempted to get httpd video streaming working by making a  
>> wvx file
>> pointing at the video file I want to stream.  When I then point my  
>> browser
>> at it, the dialog asking to open media player appears, and when I  
>> click ok,
>> th eplayer opens immediately, but it waits until the entire file (a  
>> WMV
>> file) has been transferred, showing the progress of its being  
>> buffered by
>> the player, before it actually plays the file.
> ...
> I don't really know, and I am also interested in an authoritative  
> answer.
>
> But I will dare a guess, based on what I think I know of HTTP.
> My guess would be that streaming video (or audio) would rely on the  
> capability, both of the client and the server, to handle "range"  
> requests.  The client can ask for an object, but also specify "from  
> byte x to byte y". The server then sends that part, and the client  
> starts plaing it. At the same time, the client issues more requests  
> for subsequent ranges, and the server sends these chunks, etc..
> I guess that this must also mean that the format of the media itself  
> lends itself to it, in the sense that the information needed to play  
> the thing is sent at the beginning or with each chunk, and not at  
> the end.
> All in all, I would thus guess that to do real streaming, both the  
> client and the server have to be rather specialised for that task.
>
>

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