Ganz PixelPro ZN-DT2MTP, User Manual

10

2.5 Video stream types

H.264 protocols and communication methods 

 
• 

RTP

 (

R

eal-time 

T

ransport 

P

rotocol) is a protocol that allows programs to manage 

the real-time transmission of multimedia data, via unicast or multicast. 
 
• 

RTSP

 (

R

eal 

T

ime 

S

treaming 

P

rotocol) serves as a control protocol, to negotiate the 

type of transport protocol to use for the stream. RTSP is used by a viewing client to     
start a unicast session. 
 
• 

UDP 

(

U

ser 

D

atagram 

P

rotocol) is a communications protocol that offers limited 

service for exchanging data in a network which uses the Internet Protocol (IP).   
UDP is an alternative to the Transmission Control Protocol (TCP). The advantage of 
UDP is that, it is not required to deliver all data and may drop network packets when 
there is network congestion. This is suitable for live video, as there is no point in re-
transmitting old information that will not be displayed anyway. 
 
• 

Unicasting

 is communication between a single sender and a single receiver over a 

network. This means that the video stream goes independently to each user, and 
each user gets own stream. A benefit of unicasting is, in case one stream fails, it 
only affects one user. 
 
• 

Multicasting

(Will be supported)

is bandwidth-conserving technology that reduces 

bandwidth usage by simultaneously delivering a single stream of information to 
multiple network recipients. This technology is used primarily on delimited networks 
(intranets), as each user needs an uninterrupted data flow and should not rely on 
network routers. 
 

2.6 How to stream H.264

Deciding on the combination of protocols and methods to use depends on your 
viewing requirements, and on the properties of your network. Setting the preferred 
method(s) is done in webpage. 

RTP+RTSP 

This method (actually RTP over UDP and RTSP over TCP) should be your first 
consideration for live video, especially when it is important to always have an up-to-
date video stream, even if some images are lost due to network problems. This could 
be configured as multicast or unicast.

RTP/RTSP/Multicasting 

(Will be supported) 

provides the most efficient usage of 

bandwidth, especially when there are large numbers of clients viewing 
simultaneously. Note however, that a multicast broadcast could not pass a network 
router unless the router is configured to allow this. For example, It is impossible to 
multicast over the Internet.