Extron Electronics SME 100 User Guide User Manual
Page 97
•
GOP Length — This field is used to specify the number of secondary frames
(predictive frames / P-frames) that are used between two primary frames
(intraframes /
I
-frames). A
lower GOP length uses more bandwidth since more
primary frames are required. A
higher GOP length uses less bandwidth since
fewer primary frames are required. To obtain optimal stream quality (if bandwidth
limitations are not an issue), a smaller value should be used for media that contains
more motion and a higher value should be used for media with very little motion.
The range of settings is
1
to
30
, default is
30
.
•
Audio Delay — This field is used to specify the amount of time (in milliseconds)
that the audio is delayed from the video. Video sometimes takes longer to
process (output) than audio. Audio delay is used to properly sync the audio with the
video that is being displayed. The range of settings is
0
to
999
.
Default is
0
(no audio delay).
d
RTSP Configuration panel (pull stream configuration)
•
Streaming Method — This drop-down menu is used to select the streaming
protocol that will be used by the SME 100 (see the "
" section on page 20 for more information).
•
Multicast IP — This field is used to enter the multicast IP address group that the
SME 100 will stream to, typically
239.199.188.138
. This option is not available
when using the unicast RTP streaming protocol.
•
MTU (Maximum Transfer Unit) — Sets the maximum packet size. The range of
settings is 1100 to 1500. Maximum packet size increases streaming performance.
•
TTL (Time To Live) — This field is used to specify the number of hops multicast
traffic will make between routed domains when it exits the SME 100. This option is
not available when using the unicast RTP streaming protocol.
e
Streaming Configuration panel (push stream configuration)
Consult the decoder specifications and network administrator to configure the following:
•
Stream Control — Used to turn the output stream on (enable) or off (disable).
•
Stream Method — Select one of the following options from the drop-down menu:
•
TS/UDP — (Unicast and multicast) The MPEG-2 transport stream containing
raw H.264 video or raw AAC audio (elementary streams), not wrapped by any
other headers. It is encapsulated in the UDP packets.
•
TS/RTP — (Unicast and multicast) The MPEG2 transport stream encapsulated
in the RTP/UDP. RTP provides sequencing information ensuring proper
ordering.
•
ES/RTP (Native RTP) — (Unicast and multicast) Similar to RTSP, sends a
RTP stream for video and a RTP stream for audio. These elementary streams
are encapsulated in UDP and RTP packets. To view this, an SDP file is also
required to learn how the streams are configured.
•
Destination IP — For unicast stream control insert the IP address of the target
decoder. For multicast insert the multicast standard IP address of the network,
typically
239.199.188.138
.
•
Destination Port — For unicast stream control, enter the port number of the target
decoder. For multicast, enter the multicast port number of the network.
•
MTU (Maximum Transfer Unit) — Sets the maximum packet size. The range is
1100 to 1500. Maximum packet size increases streaming performance.
•
TTL (Time To Live) — Specifies the number of router hops multicast streams are
allowed before being blocked.
Transport Streams (TS) — A form of media wrapped in MPEG-2
transport stream headers. The MPEG-2 transport headers contain
information about the media and also contain the H.264 and AAC
elementary streams embedded in the transport stream packets.
•
TS/UDP — (Unicast and multicast) An MPEG-2 transport
stream containing the elementary streams for the audio and
video. It is sent using UDP packets.
•
TS/RTP — (Unicast and multicast) – Transport stream that is
sent using RTP/UDP. RTP provides sequencing information;
if the sequencing information is reordered by the network,
RTP reorganizes and processes the information in the correct
order. UDP would process the sequencing information out of
order, making RTP performance better on larger, many hop
networks.
•
ES/RTP (Native RTP) — (Unicast and multicast) Similar to
RTSP; sends an RTP stream for video and an RTP stream for
audio.
SME 100 • Web-based Configuration Page
91