[Live-devel] problem when outputting raw H264 stream

[Guillaume Grimaldi]

Ross Finlayson a écrit :
>> Ross Finlayson a écrit :
>>>> Hi.When I capture a rtsp h264 stream with openRTSP and save it into 
>>>> a .mp4 file (-4 option), I can reproduce it with common players 
>>>> (vlc, mplayer etc.)However, if I save the captured stream into a 
>>>> "raw" file (i.e video-H264-1) I cannot see it with any player. Why ?
>>>
>>> Because those media players (which are not our software, BTW) happen 
>>> not to support playing a 'raw' H.264 file.
>>>
>> Hi everybody.
>> Did you say that common players like vlc can not read h264 raw stream ?
>
> No, I said that they cannot play a H.264 raw *file* (but you'd have to 
> ask their developers to be sure).
>
>
>>  So if I stream a H264VideoRTP, I can not read my stream with those 
>> media players.
>
> Yes you can (at least with VLC), because it implements RTSP/RTP, and 
> the RTP payload format for H.264.
>
>
>> Another point. I just want to stream on RTP and not on RTSP. Can I do 
>> that with liveMedia ? All of your example implement RTSP Server but I 
>> do not that on my implementation. This is maybe why I can not read my 
>> stream.. What do you think about that ?
>
> Yes, that's quite possible, because without a RTSP server, the client 
> (media player) might not get the SPS and PPS NAL unit data that it 
> needs to properly decode the H.264 stream.
>
> You should be using a RTSP server.
ok, thank you for your advice.
But where can I specify SPS and PPS NAL ? When I try to connect with my 
client to "rtsp://localhost:1025/liveMedia0", it say me "waiting for 
SPS/PPS".
I think I specify this in my RTSPServer, but I do not know where exactly 
( This is maybe a attribute of a ServerMediaSession or must I create a 
sdp file ?)

Thank you for your help.