Osprey Talon User Guide
25
<20180425>
Encode Profiles (RTMP/RTP only)
There are nine Encode Profiles available on Talon. These range from
‘Low’ which creates a low bitrate stream with a video resolution of
480x270, to ‘HD 1080 60fps” which creates a robust 3G stream. There
are specialty profiles for Facebook® and YouTube® that conform to the
published suggestions of those platforms. When an Encode Profile is
selected, Talon configures the advanced settings. The Video Bitrate and
Maximum Delay can be adjusted without changing the profile.
Video Bitrate
Video Bitrate (vrate) is
the desired encoded rate
of the outgoing video.
Settings are expected in Kilobits per second. For example, you may use 100000;
100k; 100K etc. You may also use 1m; 2m, etc. representing Megabits per
second. 1G, etc. is not accepted.
NOTE:
If a setting is out of bounds for the encoder you will receive the message
“status: !Error: Bad vrate xK”. This only indicates that the setting is not
acceptable to Talon. It is possible to set a value that is acceptable to Talon, but
is not adequate to support quality video.
Video Rate Control
Select VBR for Variable Bit Rate. (default) Select CBR for Constant Bit Rate. (only
recommended when your CDN requires it)
NOTE:
CBR is only supported for progressive output. Talon CBR does not allow the use of B frames.
Maximum Delay
This setting adjusts the amount of internal buffer the encoder can use. Larger buffer gives the encoder more time to produce
more accurate video. The default of 2000 is generally adequate for most streaming. A setting of 0 will result in blocky video. A
setting above 5000 does not usually provide a significant improvement.
In technical terms the Maximum Delay setting controls how much time is allowed for the bitrate to reach the average set by the
‘Video Bitrate’. A longer buffer allows the bitrate to rise and fall more with the complexity of the video. Some live encoding
applications do not tolerate large fluctuations in the bitrate. If you encounter such problems set the Maximum Delay to the
100-300ms range. This will provide better results for applications requiring a constant bit rate.
Содержание Talon G1H model AH-E23
Страница 1: ...Osprey TALON User Guide...
Страница 3: ...Osprey Talon User Guide 2 20180425...