Document Revision History

This table describes the changes to HTTP Live Streaming Overview.

Date	Notes
2016-03-01	Corrected CODECS string for H.264 High Profile level 4.1 to "avc1.640029".
2014-02-11	Added information on supporting multiple closed captions tracks to "Using HTTP Live Streaming."
2013-08-08	Made minor technical corrections.
2011-04-01	Added descripton of closed caption support, best practices for preparing media for iOS-based devices, and description of how to serve key files over HTTPS.
2010-11-15	Added description of timed metadata.
2010-03-25	Updated to include iPad and -optimize option for stream segmenter.
2010-02-05	Defines requirement for apps to use HTTP Live Streaming for video over cellular networks and requirement for 64 Kbps streams.
2010-01-20	Updated links to tools and sample streams. Added documentation of CODECS attribute and video streams with audio-only alternates.
2009-11-17	Fixed typos and corrected URLs for samples.
2009-09-09	Updated to include failover support.
2009-06-04	Added sample code, QuickTime X support. Reorganized document for readability.
2009-05-22	Changed title from iPhone Streaming Media Guide for Web Developers. Added URL for downloading media segmenter.
2009-03-15	New document that describes live streaming of audio and video over HTTP for iPhone.