|
YouTube Play Information
-------------------------------------------------------------------------------
You may right click
the icons above and select "Open new link in new window" if your
prefer.
Standard Definition
Video (SD) provides just one resolution and an option of 2
screen sizes on this site.
High Definition (HD)
provides the option of 4 resolution settings and 2 screen sizes
(see next to red line).
Full Screen is also
available in both SD and HD however, this option is only
suitable for very high resolution images and super fast ADSL+2
transmission speeds.
HD video files require faster
transmission speeds during streaming to avoid 'buffering'
delays. Some server/ player configurations automatically adjust resolution and size
after detecting slower transmission speeds. When
available, this facility obviously provides for broader
application of HD format video files.
HD quality replay is
far superior and is recommended in cases where transmission
speeds allows.
TIP: If
you incur buffering delays when playing, press 'Pause' to allow the
buffering to accumulate for a short period then drag the button
in the red progress line back towards the beginning and release.
-----------------------------------------------------------------------------------------------------------------------------------------
Further Information that
may be of interest
Internet download
speeds in common use in Australia vary from 256 to 20,000
Kilobits per second (kbs) with the choice of 1,500 to 8,000 kbs
being popular with personal users and ranging up to 20,000 and
beyond for keen hobbyists, business and professional use.
Download speeds can
vary enormously depending on the particular Internet Service Provider's plan in use, and
can further vary depending on the line conditions at the time
(congestion).
Internet transmission
speeds are normally stated using the "bit" as a unit of
measure whereas computer users are more familiar with the
"byte" as a unit of measure (the 'byte' is used exclusively when
stating file sizes).
One byte
comprises 8 bits - so it follows that if your Internet connection
speed is 12,000 kbs then you can download 12,000 kilobits or
1,500 kilobytes (1.5 MB) per second.
Video and Audio files
are very large when compared to text files (such as a document
or system file).
One page of
text requires only 27 KB (0.027 MB) to record the data in a text file
whereas a 3 minute song
recorded in CD quality requires a file size of 31,000 KB (31
MB).
Video clips can be
compiled (rendered) to any one of a range of quality standards
with each being dependant on image
dimension and resolution. A video clip compiled using
an average image
size and resolution commonly found on 'YouTube' would consume about 260 KB per
second for a Standard Definition (SD) version and 1,867 KB per second for a
High Definition (HD)
version. Note the huge difference in file sizes between SD
and HD. The HD video clip at top right "Speedboat on the
Murrumbidgee River at Hay, NSW Australia" runs for 3:50 Min - the uploaded file size
was 429,474 KB (429.474 MB).
It should be noted
that YouTube convert all uploaded files to 'Flash Player'
format (*.FLV) which are better suited for Internet transmission. This process
substantially reduces the file size, however the resultant FLV
file is still quite large. It is recommended that you
check that you have Flash Player 10 or later installed.
Adobe offer a free download and installation from the following
web site:
Adobe https://www.adobe.com/support/flashplayer/downloads.html.
Note that your
browser may prompt you for permission to download and install (usually
a yellow background line just below the browser heading).
Allow Active X to install the update. Most Windows systems
will already have Flash Player installed, however version 10 or
later is required to play High Definition video files. HD
playback function was introduced in 'YouTube' in December
2009.
|
Suggestions and
constructive criticism welcomed |
 |
|
