[Live-devel] About transfer of RTP / RTCP

[Masanobu Yoshihara]

Ross-san

Thank you for your quick answer.
I will ask again.

> But once again, you should check whether our ?LIVE555 Proxy Server" 
already does what you want.

Thank you for providing the information. 
However, I think that detailed specifications have been decided and can 
not be used.


Our system is a transmission system to which an IP camera is connected 
and 
a reception system to which a viewer is connected.
IP camera and viewer are connected via Ethernet respectively.
The sending system and the receiving system are unidirectional 
communication (wireless).


My development part does not include IP cameras and viewers.

The transmission system has the following requirements.
 - Function as an RTSP client for IP cameras
 - Transfer RTP / RTCP packets from IP camera to receiving system
 - RTCP (RR) transmission to IP camera
 - Send the media information of the IP camera to the receiving system 
with its own protocol


> If you wish to transmit the relayed packets as RTP packets, then you 
should use a ?RTPSink? subclass, *not* a ?BasicUDPSink?.  (You should 
also send RTCP packets, by creating a ?RTCPInstance? object.)

I understand that it is necessary to use the RTPSink subclass also to 
use RTCP.
Is the source class OK by using the RTPSource subclass?

Just transfer it without being conscious of media format and audio / 
video.


I may ask you about the receiving system at a later date.
Reference system requirements are as follows
 - It acts as an RTSP server for the viewer (information is received 
from the sending system with its own protocol)
 - Transfer RTP / RTCP packets from the sending system to the viewer



Please answer and give advice.

----- Original Message -----
> live555 Dear Developer
> 
> I am promoting the development of stream transfer system
> and I plan to use live 555.
> I have some questions but please check one by one.
> 
> I am developing a relay system for stream data. Transfer 
> RTP / RTCP packets from the IP camera connected via Ethernet
> to the receiving system. Transmission system and reception system
> are wireless communication and unidirectional communication. 
> The software interface of wireless communication is a unique
> interface (hardware access) without using socket. 
> Only IP and port number need to be changed and transferred.
> 
> I confirmed the source of "testRTSPClient.cpp".
> The DummySink class was able to acquire media data,
> but there was no RTP header.
> I think that it is probably because the source class
> is automatically specified as an appropriate class.
> 
> Next I confirmed the source of "testRelay.cpp".
> I do not use the BasicUDPSink class on my system,
> but I think that you can create your own class derived
> from the MediaSink class.
> In that way, we think that we can change IP packet to only
> the destination, destination IP and port number and transfer
> it to the receiving system.
> 
> Is this idea correct?
> 
> Please answer and give advice.
> 
> 
> ------------------------------------------------
> Masanobu Yoshihara
> Nippon Information Development Co., Ltd.
> TEL: +81-3-6221-6811
> FAX: +81-3-6221-6812
> E-mail: M.Yoshihara at nid.co.jp
> URL: http://www.nid.co.jp/
> ------------------------------------------------
> 
>