Helix Broadcaster 100 Touch Screen User Guide
CHAPTER 4: Video and Audio Options
26
Video Method
For
Video Method
, select one of the following:
•
Average Bit Rate
Average bit rate encoding keeps the video streaming rate at the selected bit rate as an
overall average. The actual streaming rate may be above or below the selected bit rate at any
given time, however. This fluctuation helps to improve quality over constant bit rate
encoding. Average bit rate encoding can be used with high-speed networks such as
corporate LANs, cable modems, and mobile LTE.
•
Variable Bit Rate
Variable bit rate encoding gives more bandwidth to scenes that are hard to compress,
making the most visible difference in videos that have fast-moving, high-action scenes. To
accommodate variable bit rates, the client network must be able to handle large bandwidth
spikes. This is typically acceptable on corporate networks and for cable modem use. It is
not advisable for DSL or mobile broadband connections.
•
Constant Bit Rate
Use constant bit rate for low-latency encoding. It keeps the video data more tightly set to
the bandwidth target than does average bit rate encoding. The quality may be lower than
with average bit rate encoding, but the streaming rate is stable. You may also want to
choose this encoding method when streaming over networks that have tightly constrained
bandwidths, such as 3G mobile networks.
Video GOP Size
The
Video GOP Size
field sets the “group of pictures” size in the video output. Larger values
result in higher compress. Lower values result in better visual quality. Unless you have a specific
need to change this value, leave it set to the default.
Filter Options
On the
Filters
tab you can set options that affect how Helix Broadcaster modifies video output.
Filters Tab