[FFmpeg-devel] Realmedia patch

Ronald S. Bultje rsbultje
Tue Sep 9 17:45:45 CEST 2008

Hi Luca,

On Tue, Sep 9, 2008 at 11:36 AM, Luca Abeni <lucabe72 at email.it> wrote:
> Ronald S. Bultje wrote:
> [...]
>>>> As for the transport, it can always be x-pn-tng for Real servers
>>> Are you really sure about this? I've seen real servers handling this
>>> properly (that is, accepting requests with the correct "Transport:"
>>> tag and replying with a correct "Transport:").
>> SETUP rtsp://streamr.hitpops.jp/ngc/mov/m0609.mov/streamid=0 RTSP/1.0
>> Transport: x-pn-tng/TCP;mode=play
>> If-Match:
>> RealChallenge2: d5273de0821265735b2910a6cbe0406201d0a8e3, sd=d38651c4
>> CSeq: 5
>> --
>> line='RTSP/1.0 200 OK'
>> line='CSeq: 5'
>> line='Date: Mon, 08 Sep 2008 21:11:37 GMT'
>> line='Session: 276998441-5'
>> line='Reconnect: true'
>> line='RealChallenge3: 1f1f861dfc36d2d379d74c951ba1f8bd4f213d09,sdr=18fd741f'
>> line='RDTFeatureLevel: 2'
>> line='Transport: x-pn-tng/tcp;interleaved=0'
>> The resulting stream is RTP, not RDT.
> I did a little test with this URL, capturing the traffic with wireshark.
> And wireshark is telling me that the protocol encapsulated inside the RTSP
> connection is actually RDT, not RTP. I have no time to perform other tests,
> but wireshark is detecting "RDT packet (data)" with sequence numbers,
> timestamps, etc...

I'll have a look at this "wireshark" tool, and I'll test with
"RTP/AVP" vs. "x-pn-tng" to see if that changes the packet data...

Thanks for the pointers,

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