[vlc-devel] [Videolan-devel] Bittorrent VoD

Developer developer at noknok.net
Tue Dec 22 21:02:36 CET 2009

You can implement a custom picker to sequentially grab blocks...albeit: 


Andre-John Mas wrote:
> On 22-Dec-2009, at 14:29, Juan Cristóbal Olivares wrote:
>> 2009/12/22 Rémi Denis-Courmont <rem at videolan.org>
>>        Hello,
>> Le mardi 22 décembre 2009, Marijn Swenne a écrit :
>>> I'm looking into making a Bittorrent VoD integration for VLC. So in
>>> other words, being able to open a BT metafile in VLC as you would a
>>> HTTP file and start viewing it before the whole file is downloaded.
>>> Obviously you'de need a BT client that supports VoD. I was looking
>>> into using http://www.rasterbar.com/products/libtorrent/ which has a
>>> BSD-license and modifying it to become a VoD client.
>> In my understanding, the BitTorrent protocol is fundamentally
>> incompatible with video on demand. VoD requires data to be fetched
>> linearly. BitTorrent fetches file chunks starting from the scarcest to
>> the most commonly available. This enables users to trade chunks, thus
>> maximizing the bandwidth usage. But then, you need to fetch the
>> complete video file before you can play it with a media player. Then,
>> VLC will be just worse than a dedicated BitTorrent client.
>> AFAIK, there's a variant for streaming (.tstream files). Take a look:
>> http://www.ghacks.net/2008/07/27/eztv-allows-bittorrent-streaming/ 
> I also wonder to what extent Apple's "HTTP Streaming Architecture" could
> be adapted:
> http://developer.apple.com/iphone/library/documentation/NetworkingInternet/Conceptual/StreamingMediaGuide/
> The idea being that you use the same segmented approach, but use P2P
> approach for deciding where to get the missing segment for the portion
> you are trying to play, or simply randomising the source addresses
> for each segment based on available hosts.
> André-John
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