Application level improvements:

The video window has now controls in order to switch fullscreen mode and terminate call
The out of call video preview feature (to test camera) is moved into the settings and is no longer linked to the in-call video preview feature
Add an assistant to help users to set audio/video parameters
Some ergonomics improvements (checkbox to set random port for UDP and TCP, ...)
Lots of updated translations. Arabic translation has been added
Experimental feature: play an MKV file by drag-and-dropping it on the video call window

Liblinphone level improvements:

Support for RTP/AVPF (RFC4585) for video streams, allowing fast transmission error recovery with VP8 codec only.
API enhancements, most objects can be ref-counted.
Add some getter funtctions to the call information API
Add a function in the API to accept early-media calls
Add a function to set the SIP transport timeout
Add a function to change adaptive rate algorithm at runtime
Add support of file transfer
Call video recording feature, in mkv format (H264 streams only for the moment)
Call playing feature: play an MKV file and send the audio/video stream through a call
Local player API. Play WAV and MKV file and display video on a specified window display
A wrapper for Python has been made
Support of Wake Locks on Android
Support of multicast IP addresses
Support of incoming UPDATEs within dialog (RFC3311)
Support of SRTP by using packages from GNU/Linux distributions