[xiph-rtp] Fragmenting in RTP versus letting UDP fragment

[Ken Linder (kc7rad)]

Pardon my ignorance, or not, as the case may be (newbie here).  It is my 
understanding that RTP normally rides on UDP packets.  That being the case, 
there could be no retries...  right?

Now, if the RTP was riding on TCP, then there are built-in retries.  Of 
course, using TCP throws away many advantages of UDP/multicasting.

Now, how the heck can I fin get real time SPEEX data to fit in a 256 byte 
packet, eh?  :-)

Ken
KC7RAD
----- Original Message ----- 
From: "Jack Moffitt" <jack at xiph.org>
To: <xiph-rtp at xiph.org>
Sent: Sunday, October 31, 2004 9:07 PM
Subject: Re: [xiph-rtp] Fragmenting in RTP versus letting UDP fragment


>> No, RTP is a real time protocol. There are no retries at all. If
>> something does not arrive it is simply not played.
>
> You have some time to retry even if it is realtime.  It's not 'one shot
> only'.  After all, the packets aren't guarunteed to arrive in order
> anyway.
>
> jack.