Grandstream Networks GXV34 0 Series Manual page 39

Enables/disables RFC5168 mechanism for video calls. RFC5168 allows SIP party to request the
Enable RFC5168
sender to refresh its video frame in H.264, or refresh the full picture in VP8.
Support
The default setting is "Yes".
If set to 0, FEC is not sent by separate port. If set 1, FEC is sent by separate port.
Video FEC Mode
Default setting is 0.
FEC Payload Type Configures FEC payload type. The range is 96-126. Default setting is 120.
Set video packetization mode. If set to "Single NAL Unit Mode", the packetization mode will be
negotiated as single NAL unit mode when dial video calls, if the other party does not support the
negotiation, then single NAL unit mode will be used for video encoding by default. If set to "Non-
Interleaved Mode", the packetization mode will be negotiated as Non-interleaved mode when dial
Packetization Mode video calls, If the other party does not support negotiation, then the Non-interleaved mode will be
used for for video encoding by default; If set to "Prefer Non-Interleaved Mode", the packetization
mode will be negotiated as prefer Non-interleaved mode when dial video calls, if the other party
does not support the negotiation, then prefer Non-interleaved mode will be used for video
encoding by default.
Sets the H.264 image size. It can be selected from the dropdown list.
720P
● 720P
● 4CIF
● VGA
H.264 Image Size
● CIF
● QVGA
● QCIF
Note: For some network environment, the default setting "720P" might be too high that causes no
video or video quality issue during video call. In this case, please change "H.264 Image Size" to "VGA"
or "CIF" and change "Video Bit Rate" to "384kbps" or lower. The default setting is 720P.
Use H.264 Configures that whether to set H.264 constrained profiles.
Constrained Profiles The default setting is "No".
Selects the H.264 profile type from the dropdown list.
● Baseline Profile
● Main Profile
● High Profile
● BP/MP/HP (Default Setting)
H.264 Profile Type
Note: Lower levels are easier to decode, but higher levels offer better compression. Usually, for the best
compression quality, choose "High Profile"; for playback on low-CPU machines or mobile devices,
choose "Baseline Profile". If "BP/MP/HP" is selected, all three profiles "Baseline Profile" "Main Profile"
and "High Profile" will be used for negotiation during video decoding to achieve the best result. This is
usually used in video conference when there is higher requirement on the video.
Configures the bit rate for video call. It can be selected from the dropdown list. The default setting is
2048 kbps. The valid range is from 32 – 2048 kbps.
Note: The video bit rate can be adjusted based on the network environment. Increasing the video
bit rate may improve video quality if the bandwidth is permitted. If the bandwidth is not permitted,
Video Bit Rate
the video quality will decrease due to packet loss. For some network environment, the default
setting "720P" might be too high that causes no video or video quality issue during video call. In this
case, please change "H.264 Image Size" to "VGA" or "CIF" and change "Video Bit Rate" to "384kbps"
or lower.