title: Asterisk12 and sipML5 video support
body: <p>is it possible to send video each other on asterisk12 and sipML5 demo site?
  I can hear audio but video is black screen...
  I set sip.conf like this,</p>
  
  <pre><code>[general]
  videosupport=yes
  [6001]
  host=dynamic
  secret=1234
  context=from-internal
  type=friend
  encryption=yes
  avpf=yes
  force_avp=yes
  icesupport=yes
  directmedia=no
  disallow=all
  allow=ulaw
  allow=alaw
  allow=gsm
  allow=h261
  allow=h263
  allow=h264
  allow=vp8
  dtlsenable=yes
  dtlsverify=fingerprint
  dtlscertfile=/etc/asterisk/keys/asterisk.pem
  dtlscafile=/etc/asterisk/keys/ca.crt
  dtlssetup=actpass
  
  [6002]
  host=dynamic
  secret=1234
  context=from-internal
  type=friend
  encryption=yes
  avpf=yes
  force_avp=yes
  icesupport=yes
  directmedia=no
  disallow=all
  allow=ulaw
  allow=alaw
  allow=gsm
  allow=h261
  allow=h263
  allow=h264
  allow=vp8
  dtlsenable=yes
  dtlsverify=fingerprint
  dtlscertfile=/etc/asterisk/keys/asterisk.pem
  dtlscafile=/etc/asterisk/keys/ca.crt
  dtlssetup=actpass
  </code></pre>
  
  <p>my environment,
  sipml5 demo site
  <a href="http://sipml5.org/call.htm?svn=224" rel="nofollow">http://sipml5.org/call.htm?svn=224</a></p>
  
  <p>asterisk
  Asterisk 12.4.0 built by root @ 48asterisk on a x86_64 running Linux on 2014-08-01 08:22:18 UTC</p>
  
  <p>OS
  debian 7.6</p>
  
  <p>Thank you for your cooperation.</p>