How-to Enable Video support in Asterisk
Asterisk Supported video codecs
H.261
H.263
H.263p (Asterisk 1.4)
H.264 (Asterisk 1.4)
Note : Still Asterisk 1.4 V has issue regarding video codec negotiation
For old Version :
enable video in Asterisk, modify sip.conf to add:
[general] videosupport=yes
For New Version :
Edit the following file /etc/asterisk/sip_general_custom.conf and add the following lines
videosupport=yes
allow=h264
allow=h263
allow-h263p
Then restart asterisk so that it reloads the config files