I have a doubt. When I am trying to debug RTSP streaming with QT
(which I am still unable to achieve), I found one difference between
QT and VLC setup.
The SDP information when I connected using QT is as follows:
a=rtpmap:96 H264/90000
a=fmtp:96
packetization-mode=1;profile-level-id=428015;sprop-parameter-sets=J0KAFZZUCg/QgAATiA,KM4ECMg=
a=control:track1
RTSPClientSession[0xab8ff8]::incomingRequestHandler1() read 303
bytes:SETUP rtsp://172.16.1.211:8002/ch2/track1 RTSP/1.0
CSeq: 2
Transport: RTP/AVP;unicast;client_port=6970-6971
x-retransmit: our-retransmit
x-dynamic-rate: 1
x-transport-options: late-tolerance=2.900000
User-Agent: QuickTime/7.6 (qtver=7.6;os=Windows NT 5.1Service Pack 3)
Accept-Language: en-US
And when I connected using VLC player, the log is as follows:
a=rtpmap:96 H264/90000
a=fmtp:96
packetization-mode=1;profile-level-id=428015;sprop-parameter-sets=J0KAFZZUCg/QgAATiA,KM4ECMg=
a=control:track1
RTSPClientSession[0xab8ff8]::incomingRequestHandler1() read 183
bytes:SETUP rtsp://172.16.1.211:8002/ch2/track1 RTSP/1.0
CSeq: 3
Transport: RTP/AVP;unicast;client_port=56630-56631
User-Agent: VLC media player (LIVE555 Streaming Media v2008.07.24)
When I compare, I observed some new parameters like x-retransmit,
x-dynamic-rate, x-transport-options. I presume these are client
specific options. Where can I find more information about the same?
Do they impact the final video display on the screen? Should I tweak
any of these parameters?
.
Those are Apple-specific options that are handled only by Apple's
'Darwin Streaming Server'. I think they are only optimizations (for
reliable) delivery, and I doubt they're the reason why QuickTime
Player doesn't play your stream. Instead, the reason is probably
that QuickTime Player doesn't support the particular variant
('profile') of H.264 that you're using.
However (for the bazillionth time!) QuickTime Player is not our
product, and this is not the right mailing list for bug reports with
QuickTime Player. Instead, use an appropriate QuickTime mailing list.
--
Ross Finlayson
Live Networks, Inc.
http://www.live555.com/
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