H.264 streaming

[GameProfessor]

I'm developing a gateway/proxy in charge of processing a video stream (RTP/RTSP) with some special functions for H.264. What it does with the video stream isn't important. The problem is that i really need a program that can run h.264 video stream in linux (it's a piece of cake in windows). After searching the whole week, i found that there's only two programs in linux that can manage to run RTP stream: MPlayer and mp4player (in mpeg4ip suite). (I use the popular Darwin Streaming Server which only support RTP/RTSP). Due to some advertisement, it seems that these two can play h.264 video (there's h264.h in their source code) but when i try, it doesn't play the sample h.264 file go with the server.
Not out of hope, i try to make some h264 video of my own. i download mpUI, mencoder, staripx, and realAnime but they are mostly two complicated and there is no example to follow. RealAnime looks straight up but i don't understand why it only output .mkv file although it has an option to choose MPEG4 container.

I'm not a professional in video encoding, actually i don't understand most of the parameters, I just need to make a H.264 video (.mp4) in the simplest way possible (do this in linux or windows is ok) and how to play it as a RTP stream in linux (the player must be in linux). Please help me

[nm]

By running you mean playing? There should be plenty of players supporting RTP streams on Linux. At least MPlayer, Xine and VLC do. Which MPlayer version did you try? Latest CVS should be fine, but pre7 and older probably have problems with H.264. Try VLC if you can't get MPlayer to work.

[Sagittaire]

Try Nero Recode ... it's a very simple way for make iso MPEG4 stream.