SPONSORED CONTENT JUNE 2017 STREAMING MEDIA SPOTLIGHT SERIES WP25
Figure 6. The AWS Elemental Live encoder is tuned to take a live
video feed or stream and encode it in real time. It can pass the
streams off to A WS Elemental Delta, which handles the delivery.
Figure 7. AWS Elemental Server is a file-based encoder that takes video sources and transcodes them to hundreds of different
bitrates and resolutions, suitable for delivery by AWS Elemental Delta to myriad viewing devices.
While AWS Elemental Live is a live stream-based
encoder, AWS Elemental Server is a file-based encoder
for on-demand content (Figure 7). AWS Elemental Server
takes source video files and can encode them to literally
hundreds of bitrates and resolutions (SD, HD, 4K, etc.) for
delivery to all of the different types of devices that viewers
use today. Because these videos aren’t being delivered in
real time, AWS Elemental Server can take as much time
as it needs to analyze and process each file. It can also
process video files faster than real time, turning around
assets quickly for delivery. For premium content, such as
a television series or movie, AWS Elemental Server can
encode the video files to the highest possible quality,
because that’s what customers are paying for and have
come to expect. VOD services may employ a fleet of AWS
Elemental Servers to process video files, again passing
them along to a packaging and delivery platform like
AWS Elemental Delta.
Because AWS Elemental Server is a software-based
solution, content publishers can leverage as much hardware
processing power as they want in order to achieve the
desired balance of high picture quality and speed of encoding.
AWS Elemental Server also offers tremendous scalability
and has been optimized to process assets in parallel.
The HEVC/H.265 Video Codec
As we mentioned earlier, the codec of choice for
delivering video evolves every few years, and each
advance brings with it improved quality at lower bitrates.
At the same time, screen sizes and resolutions have gotten
bigger, so it takes considerable computing power to
generate compressed files with high video quality.