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<p class=MsoPlainText><font size=2 face="Courier New"><span style='font-size:
10.0pt'>Hi,<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span style='font-size:
10.0pt'><o:p> </o:p></span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span style='font-size:
10.0pt'>I have implemented the H264VideoStreamer subclass and am able to
successfully unicast stream to a single VLC client. For this I had modified the
live sdp generation code to exclude the fmtp:... line from the returned
describe response for H264.<font color=navy><span style='color:navy'> In this
case I am able to play the streamed content using MPlayer or VLC client.</span></font><o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span style='font-size:
10.0pt'><o:p> </o:p></span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span style='font-size:
10.0pt'>If I pass the profile level id "profile_level_id" and <o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span style='font-size:
10.0pt'>"sprop_parameter_sets_str" parameters to <o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span style='font-size:
10.0pt'>"H264VideoRTPSink::createNew()" as suggested and ensure that
the sdp returned contains the correct <font color=navy><span style='color:navy'><o:p></o:p></span></font></span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span style='font-size:
10.0pt'>fmtp:<font color=navy><span style='color:navy'> line –“a=fmtp:97
packetization-mode=1;profile-level-id=000042;sprop-parameter-sets=Z0Ligqwewo3FkkBaHsuG,aMOOOOKCrA==”<o:p></o:p></span></font></span></font></p>
<p class=MsoPlainText><font size=2 color=navy face="Courier New"><span
style='font-size:10.0pt;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=navy face="Courier New"><span
style='font-size:10.0pt;color:navy'>then my vlc client is not able to play the
stream.(I am also unable to play using MPlayer)<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=navy face=Arial><span
style='font-size:10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=navy face=Arial><span
style='font-size:10.0pt;font-family:Arial;color:navy'>I have extracted the
profile level id and sps and pps and using h264analyzer tool.<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=navy face=Arial><span
style='font-size:10.0pt;font-family:Arial;color:navy'>Also I have base64
encoded the sps and pps as stated in the rfc-3984.<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=navy face=Arial><span
style='font-size:10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=navy face=Arial><span
style='font-size:10.0pt;font-family:Arial;color:navy'>I suspect that the vlc
client is able to play the h264 stream when it extracts the decoder parameters
from the rtp stream itself (in band; we are transmitting NAL units 7 and 8 (sps
and pps) also over RTP). But if we try to provide the profile id and
sprop_parameters over sdp (while also streaming the NAL packets 7 and 8 over
rtp as before) then even a single requesting client is unable to play the
stream. Maybe the presence of the fmtp: line stops the client from looking for
this information within the stream. But the fmtp: line provided by us is not
intelligible enough to the client to successfully play the stream.<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=navy face=Arial><span
style='font-size:10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=navy face=Arial><span
style='font-size:10.0pt;font-family:Arial;color:navy'>As our actual requirement
is to unicast stream to multiple clients (reuseFirstSource is set to True) and
also stream multicast we need to communicate using the sdp, the in band
mechanism is not sufficient and also not reliable.<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span style='font-size:
10.0pt'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>I have attached our sdp and NAL frame
(contains NAL units 7 and 8) alongwith the mail. We may be missing some needed
information in sdp or we might be communicating it in the wrong format or I
might be totally mistaken</span></font><font size=2 color=navy face=Wingdings><span
style='font-size:10.0pt;font-family:Wingdings;color:navy'>J</span></font><font
size=2 color=navy face=Arial><span style='font-size:10.0pt;font-family:Arial;
color:navy'>. Could you tell us the correct sdp fmtp line to generate or any
pointers to missing or incorrect information in our sdp?</span></font><o:p></o:p></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'> I have
attached ethereal extracted sdp description and NAL packet extracted from h264
analyzer.Please check the attached text file.</span></font><o:p></o:p></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Regards</span></font><o:p></o:p></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Soumya</span></font><o:p></o:p></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>LGSI</span></font><o:p></o:p></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
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