[Live-devel] VLC needs to send the PLAY command twice

[Mario Raffin]

Dear developer(s),
     thank you for this great code. I am developing an IP camera which 
streams H.264 video via rtp in UNICAST. I use VLC to receive the stream.
At the beginning I used the multicast SSM and all was fine. Then I 
implemented the unicast as described in the FAQ starting from the 
testOnDemandRTSPServer.cpp. Here I noticed that when using VLC under 
linux the stream was quite slow to start while with the VLC windows 
version it did not start at all. So looking at the session init, I 
noticed that the session never start after the first PLAY but VLC needs 
to close the first session and call PLAY again.
When I start playing all seems OK, I see the the OPTIONS,DESCRIBE, SETUP 
and PLAY from the VLC client. After the PLAY the source always replies 
with the OK. Then, immediatly after this *first *PLAY the VLC client 
sends a GET_PARAMETER request, the server answers but the streams does 
not starts and after about 10s the client sends a TEARDOWN and closes 
the session (in the middle I see a couple of RTCP packets).
After the *second *PLAY, the GET_PARAMETER request is not sent and the 
stream starts immediatly.

I attached the packet description I get with Wireshark.

Some idea or suggestion about the possible cause of this strange 
behaviour will be very appeciated.

Thank you.
M. Raffin
-- 


	*Mario Raffin *
Development Engineer
Ermes Elettronica s.r.l.
via Treviso, 36
31020 San Vendemiano (TV) Italy (Map 
<http://maps.google.com/maps?f=d&source=s_d&saddr=&daddr=Strada+sconosciuta&hl=it&geocode=FeM5vAIdPQe8AA&mra=mr&sll=45.890001,12.320609&sspn=0.006019,0.013733&ie=UTF8&ll=45.890374,12.31915&spn=0.005272,0.010804&t=h&z=17>)
Mail: raffin at ermes-cctv.com <mailto:raffin at ermes-cctv.com>
Web:http://www.ermes-cctv.com/
/Tel. +39 0438 308470/
/Fax. +39 0438 492340/


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