Nagarajesh Garapati MEE10:11, pp. 44. COM/School of Computing, 2010.
YouTube is today one of the most popular video sharing web
sites. It is using Flash Player technology together with progressive
download to deliver videos in a variety of qualities adaptable to the
clients connection speed and requirements. Recently YouTube has
got much more user attention with the introduction of HD (High
Definition) video content on its web site. This work started with
analyzing different aspects of YouTube videos and finding a way to
detect re-buffering events during playback. In an effort to do this,
38 videos were uploaded to YouTube and analyzed with respect to
codec, container format, encoded bitrate and resolution. An application
called YouTube Player API was used to detect the re-buffering
events and some more useful information for the investigation. The
greater part of the work concentrated on estimating the effect of
re-buffering on the end user perceived quality of YouTube videos.
Finally, conclusions were made by presenting a way to estimate the
effect of re-buffering on the perceptual quality of YouTube videos and
stating that the maximum quality available on YouTube for HD-720P
and HD-1080P is approx 3.91 and 3.86 (on a scale from 1 to 5) respectively.