PlayBack a H263 Hang X-Lite

pls guide me on howto setup video streaming using x-lite.

I’d tried long… it has warning:
format_h263.c:163 h263_read: Length 5333 is too long
– Playing ‘/var/lib/asterisk/video/test’ (language ‘en’)

then both the asterisk and X-Lite proved become very very slow. So I have to kill them…

how could this happen?

I only simply configure the system as below:

#######sip.conf#########
[general
videosupport=yes

##extensions.conf#########
exten => 555,1, Playback(/var/lib/asterisk/video/test)

For your information,

I simply convert an avi file into h263 and then put it under the directory /var/lib/asterisk/video and re-named it as test.h263. File size: 5MB.

Besides, under the same directory, I have put a gsm file which I copy from the asterisk library itself(vm-goodbye.gsm) and re-named as test.gsm. File size=1KB.

Any guide and sugesstion is truly appreciated.
Thanks and regards.