"One of the recurring themes of our work over the past few years has been synchronising web-based media with audio/video.

"In this first of two technical blog posts on our recent work on P2P Next, we explain why and how we implemented the HTML5 media element attribute startOffsetTime in Firefox to enable accurate synchronisation of out-of-band timestamped metadata with media streamed live to a browser over the internet. "

Live streams, sub-titles, why NTP can't be used etc. etc. If you are interested, please see:

 
http://www.bbc.co.uk/blogs/researchanddevelopment/2012/01/implementing-startoffsettime-f.shtml

Cheers,
David
--
SatSignal software - quality software written to your requirements
Web:  http://www.satsignal.eu
Email: [email protected]

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