Setting Up The H.264 Video Encoding Rate - Cisco D9054 Installation And Operation Manual

Setting Up the H.264 Video Encoding Rate

Proceed as follows to set up the Video Encoder:
1. From the user interface of the D9054 HD Encoder, click the Video tab, expand
the H.264 icon and click the Encoding Rate icon from the sub-pages.
2. Set the Video Rate Mode. Set the Video Rate Mode to Fixed, VBR or Statmux.
Fixed is used for constant bit rate support. VBR is constrained to a maximum
rate whereby Statmux allows you set video bit rate (i.e., minimum and
maximum) which the encoder can operate within.
3. Set the VBR Mode. This controls the video encoding bit rate during periods of
low complexity. Select a setting from most to least aggressive. Selections are:
Best Quality, Low, Moderate, Aggressive and Very Aggressive. The default is
Best Quality.
4. Set the Video Bit Rate. The GUI automatically displays the Maximum Allowed
Bit Rate in order to help you set the correct video bit rate. (Fixed Video Rate is
not used.)
The maximum encoding rate allowed depends on the outgoing TS rate. You
must increase the TS rate, if possible, if you need a higher encoding rate than
displayed. The legal bit rate is in the range from 3 to 20 Mb/s at MPEG-4 part 10
MP@L4 video compression rate or 3 to 25 Mb/s MPEG-4 part 10 HP@L4 video
compression rate for the 4:2:0 Chroma format.
Note: If you want to increase the video bit rate, ensure there is sufficient
capacity on all of the outputs.
5-18 D9054 HDTV Encoder Intstallation and Operation Guide 4038938 Rev A