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Re: RTP over RTSP (TCP) support in QuickTime

That makes sense - thanks! Looks like that way, they get it through proxies too.

Skye


On Feb 21, 2007, at 18:08, William Ahern wrote:

On Wed, Feb 21, 2007 at 04:53:14PM -0800, Skye Poier Nott wrote: 
Hi, a new question.  I'd like to make sure I'm understanding this
correctly.

It looks like even though DSS/QTSS supports "interleaved RTP" (ie RTP
over the RTSP TCP channel) for NAT traversal, QuickTime Player
doesn't support it!


The HTTP tunneling *is* doing interleaved RTP. HTTP tunneling is the same as
interleaved RTP, except there's an additional layer where incoming traffic
is base64 encoded and pulled w/ a GET and outgoing traffic is base64 encoded
and push w/ POST.

If you decode the HTTP data you just get plain-ole RTSP/RTP in interleaved
transport mode, w/ a few QTSS-specific headers in the playback setup.

I think the Apple guys just surmised that if interleaving the payload
already cost in terms of higher latency and poorer flow control, why not
toss in HTTP tunneling and turn the mode into a failsafe that is actually
failsafe.

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References: 
 >RTP over RTSP (TCP) support in QuickTime (From: Skye Poier Nott <email@hidden>)
 >Re: RTP over RTSP (TCP) support in QuickTime (From: William Ahern <email@hidden>)



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