What types of mux is possible?

[Lillu]

Hello to everybody!

Sorry for maybe supid question I am only begginer, but what mux types of mux in VLC is possible? I read here http://www.videolan.org/doc/streaming-h ... /ch03.html that mux sets encapsulation method for video. But I can't find the full option for mux. In mane examples there are can be various options for mux (ts, dummy, mp4...) But I can't find description for all possible options. What is the consequence of using them?
The type of mux greatly influence on result. If I, e.g., use VLC for receiving video stream like
vlc --file-logging --log-verbose=2 --logfile=/tmp/vlc_log_transform.txt file:///home/sdp.sdp --sout '#standard{access=file,mux=,dst=/home/result_4.mp4}'
I will get different results.
For e.g. with mux=mp4 I get the following strings in log file:
mux_mp4 warning: i_length <= 0
mux_mp4 warning: i_length <= 0
mux_mp4 warning: i_length <= 0
mux_mp4 warning: i_length <= 0

In case of using dummy there are no such strings at all.
I will be very grateful to you for information. Please help me to clear up all information.

Thanks.