Firmware Version 1.0.1.27 - Grandstream Networks GXV3240 Administration Manual

ILBC Frame Size
Enable RFC5168 Support
H.264 Image Size
H.264 Profile Type
Video Bit Rate
SDP Bandwidth Attribute

Firmware Version 1.0.1.27

orders using the Up and Down button.
Select the iLBC frame size when iLBC is selected. Users can select
20ms or 30ms. The default setting is 30ms.
If set to "Yes", RFC5168 support will be enabled for video call. The
default setting is "No".
Select the H.264 image size from "720P" "4CIF" "VGA" "CIF" "QVGA"
and "QCIF". The default setting is 720P.
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.
Select the H.264 profile type from "Baseline Profile" "Main Profile" "High
Profile" or "BP/MP/HP". The default setting is "Baseline Profile". 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 bit rate for video call. The default setting is 2048 kbps. The
valid range is from 32 - 2048 kbps. 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, the video quality will decrease due to packet loss.
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.
Select the SDP bandwidth attribute from "Standard" "Media Level"
"Session Level" and "No" to modify the session format. The default
setting is "Media Level".

Standard: use AS format in session level; use TIAS format in media
level

Media Level: use AS format in media level

Session Level: use AS format in session level

No: no modifications in the session format
GXV3240 Administration Guide Page 41 of 76