Fix all issues of h264 codec on current pjsip project.
The fixing must pass this test:
1. h264 video call iOS-Linephone (or one other standard sip client)
2. Modify something to make iOS-MS Lync 2013 client video call working. This time, you will need to check which need to be modified if need (I will not point you like before). I can support to test this.
3. Document what you did.