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<DIV><SPAN class=757253707-07052004><FONT face="ＭＳ Ｐゴシック" color=#0000ff
size=2>Hi,</FONT></SPAN></DIV>
<DIV><SPAN class=757253707-07052004><FONT face="ＭＳ Ｐゴシック" color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=757253707-07052004><FONT face="ＭＳ Ｐゴシック" color=#0000ff
size=2>When you use RTSP without specific indication, you are unicasting through
UDP. As you indicated from your email, the user types in the URL of the machine.
Therefore, it is multicasting since it is not a multicast address. Maybe
you want to check if any firewall (either the server network or the
LAN) is blocking UDP access.</FONT></SPAN></DIV>
<DIV><SPAN class=757253707-07052004><FONT face="ＭＳ Ｐゴシック" color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=757253707-07052004><FONT face="ＭＳ Ｐゴシック" color=#0000ff
size=2>Sorry that I can't give much info.</FONT></SPAN></DIV>
<DIV><SPAN class=757253707-07052004><FONT face="ＭＳ Ｐゴシック" color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=757253707-07052004><FONT face="ＭＳ Ｐゴシック" color=#0000ff
size=2>Regards,</FONT></SPAN></DIV>
<DIV><SPAN class=757253707-07052004><FONT face="ＭＳ Ｐゴシック" color=#0000ff
size=2>Dixon Siu</FONT></SPAN></DIV>
<BLOCKQUOTE dir=ltr
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<DIV class=OutlookMessageHeader dir=ltr align=left><FONT face=Tahoma
size=2>-----Original Message-----<BR><B>From:</B>
live-devel-bounces@ns.live.com [mailto:live-devel-bounces@ns.live.com]<B>On
Behalf Of </B>Riccardo Rosapepe<BR><B>Sent:</B> Saturday, May 08, 2004 1:12
AM<BR><B>To:</B> live-devel@ns.live.com<BR><B>Subject:</B> [Live-devel] Some
stupid questions<BR><BR></FONT></DIV>
<DIV><FONT face=Arial size=2><FONT face="Times New Roman" size=3>Dear Mr.
Finlayson,<BR><BR>Thank you for the excellent job that you did with live.com
streaming libraries.<BR><BR>I implemented a streaming application on the top
of testMPEG4VideoStreamer test program.<BR>My app grabs video from an usb
device then encodes the grabbed frame in mpeg4 format ( using ffmpeg 0.4.8
codec ) and streams it over the network.<BR>I wrote "VideoDeviceSource" a
"FramedSource" subclass that delivers video frames to the RTPSink, following
your suggestions in the faq and after a little debugging everything went
ok.<BR><BR>Now, there are 2 different scenarios:<BR><BR>1) When the streaming
server ( my application ) is on a LAN i can stream multicast and play stream
on a client machine on the same LAN using VLC or Quicktime and the url in the
format rtsp://url_of_the_machine:7070/testStream ...the players can play the
stream very well and everything is fine!<BR><BR>2) When the streaming server (
my application ) is NOT a LAN but on a machine that has a gprsmodem with a SIM
card that, connecting via ppp bridge obtains an url from an internet provider
, VLC or Quicktime are not able to play the url in the format
rtsp://url_given_from_provider:7070/testStream .<BR>Why?<BR><BR>Consider that
the machine with gprs modem is a linux box and, after obtained an url from a
provider ( e.g.: 217.40.15.218) i can open an ssh tunnel from a machine on the
LAN ( 192.168.1.55 ) to this machine just typing ssh
root@url_given_from_provider and the command succeeds. Maybe because ssh
services uses simple tcp? <BR><BR>Should i stream using unicast? <BR>If yes..
how? How can i quickly change my program? Your suggestions in the faq
<BR><BR>--------"In "test*Streamer.cpp", change "destinationAddressStr" to the
(unicast) IP address of the intended destination. In the corresponding
"test*Receiver.cpp", change "sessionAddressStr" to "0.0.0.0".
------<BR><BR>don't seem to work. Should i open url in vlc like rtsp://0.0.0.0
?<BR><BR>Please help me, i'm stuck with it and in my company we desperately
need to stream using a wireless box.<BR><BR>p.S.: When i'll find a solution
there is another question. GPRS bandwidth is very low ( 12 kbits/s )<BR>My
actual settings are: size: 176x144, fps :5, qmin = 3; qmax = 31; bitrate = 4.
Is there any other improvement that i can apply to achieve better
performance?<BR><BR>p.p.s: Why realPlayer( version 10 ) doesn't read streams
from testMPEG1or2VideoStreamer ? <BR><BR>Thanks in advice for your
help.<BR><BR>Riccardo Rosapepe</FONT><BR><BR><BR><BR><BR>
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