[Live-devel] testMPEG1or2AudioVideoToDarwin source code doubt

[venkata sripada]

the last RTSP command issued by testMPEG1or2AudioVideoToDarwin seems to be
different from a regular broadcaster...wat i mean to say is after the
ANNOUNCE,SETUP commands QuickTime Broadcaster issues a RECORD command
where as testMPEG1or2AudioVideoToDarwin issues a PLAY command...why is
this being done any specific reason...

also in the SDP file we are putting zero's in variable 'm' instead of
telling at which ports the Audio or Video is being broadcasted...is this
done only because we are using same TCP port to send the RTP stream...

raja

> At 12:51 PM 7/28/04, you wrote:
>>i'm trying to understand testMPEG1or2AudioVideoToDarwin.cpp program..to
>> see how it works...i wanted where exactly are we packing the video and
>> audio data into RTP packets..is this being done in
>>MPEG1or2VideoRTPSink.cpp and MPEG1or2AudioRTPSink.cpp
>
> Yes, and its parent class: "MultiFramedRTPSink".
>
>>  ..also when i use
>>ethreal to see these packets it shows as mpeg packets...i understand
>> that we are transmitting them over TCP..i thought it is a common
>> practise to transmit RTP over UDP...
>
> Yes, but RTP packets can also be sent over TCP, using the same TCP
> connection that's used for RTSP.  The "DarwinInjector" implementation
> currently does this, because I figured that it would usually be
> considered  important to transport data to the DSS reliably (and also to
> make it easier  to inject the stream to a DSS that's on the other side
> of a firewall).
>
>
> 	Ross Finlayson
> 	LIVE.COM
> 	<http://www.live.com/>
>
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