Operation Manual

 Mux Parameters: these are advanced controls related to audio/video multiplexing and

(P)SI tables.

Advanced Tab – Video Parameters

The Video Parameters section is shown below:

 GOP Mode: Select between Open GOP and Closed GOP. The normal setting is Open

GOP. Closed GOP is used for some storage applications, and is also required by some

CDNs (such as YouTube); there is a very small negative impact in video quality if Closed

GOP is selected. For some output protocols (HLS and RTMP), this control becomes

read-only and is forced to Closed GOP.

 Level: Selects the H.264 level signaled in the bitstream. The default setting is Auto-

Select, whereby the encoder will signal the minimum required level based on the current

settings. If, for some reason, a different (higher) level is desired, it can be selected here.

Note that the encoder will not honor a level selection that is lower than the legal

minimum for the current settings. It is typically not necessary to change the level from

Auto-Select.

 Profile: This control has four options:

o Auto-Select: With this setting, the encoder will use High Profile for HD and

Main Profile for SD.

o High Profile: With this setting, the encoder will always use High Profile for all

resolutions.

o Main Profile: With this setting, the encoder will always use Main Profile for all

resolutions.

o Baseline Profile: With this setting, the encoder will always use Baseline Profile.

The GOP Structure control will not be selectable in Baseline Profile and will be

set to IP.

Note that, as the profile is lowered, there will be video quality degradation. In other

words, for a given resolution and bit rate, the video quality for High Profile will be better

than Main Profile, and Main Profile will be better than Baseline Profile. Whether the

quality difference is noticeable will depend on the resolution, bit rate, and specific video

content.