Grandstream Networks GVC3210 Administration Manual page 46

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Video
Enable RFC5168
Support
Packet
retransmission
Enable Video FEC
Video FEC Mode
FEC Payload
Type
Enable FECC
FECC H.224
Payload Type
SDP Bandwidth
Attribute
Video Jitter
Buffer Maximum
(ms)
Enable Video
Gradual Decoder
Refresh function
Preferred video
codec
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If set to "Yes", the RFC5168 mechanism will be enabled for video call. RFC5168
allows SIP party to request the sender to refresh its video frame in H.264, or refresh
the full picture in VP8. The default setting is "Yes".
When the function is enabled, signaling will carry RTX information, if the final
negotiation is succeeded, the related media RTX function will realize packet loss
retransmission purpose. When this function is disabled. then packet loss
retransmission cannot be used.
If enabled, the video sender will temporarily allocate part of the bandwidth to one data
channel to send FEC data to system, thus to improve the video quality the receiver
gets. Enabling this function will take up part of bandwidth and reduce call rate. The
default setting is "No".
If set to 0, FEC is not sent by separate port. If set 1, FEC is sent by separate port.
Default setting is 0.
It is used to configure FEC payload type. The range is 96-127. The default setting is
120.
If set to "Yes", you can control the camera of the opposite side for video call, but the
opposite site must support FECC, and allow remote control on its local camera. The
default setting is "Yes".
It is used to configure FECC H.224 payload type. The valid range is from 96 to 127.
The default value is 125.
It is used to select the SDP bandwidth attribute from "Standard", "Media Level" or
"None". The default setting is "Media Level".

Standard: Use AS at the session level and TIAS at the media level.

Media Level: Use AS at the media level.

None: Do not change the format.
Note:
Please do not change the format as it may cause decode failure if the user is unclear
about what format the server supports.
It is used to configure the video buffer size according to the network environment. The
valid range is 0-1000, the default setting is 50.
GDR (Gradual Decoder Refresh) by P frame including the method of applying I block
group to achieve asymptotic refresh. If set to "Yes", GDR will bring better network
adaptability. The default setting is "No".
It lists the available and enabled video codecs for this account. Users can enable the
specific video codecs by moving them to the selected box and set them with a priority
order from top to bottom. This configuration will be included with the same preference
order in the SIP SDP message. The codec option includes "H.264" and "H.265".
GVC3210 Administration Guide
Version 1.0.1.21
P a g e | 46