1. Average duration of mobile video chat. http://goo.gl/ow9uDT. Average duration of mobile video chat. http://goo.gl/ow9uDT.
2. ffmpeg. http://www.ffmpeg.org/. ffmpeg. http://www.ffmpeg.org/.
3. Juniper research report. http://goo.gl/F5qvGz. Juniper research report. http://goo.gl/F5qvGz.
4. Linphone. www.linphone.org. Linphone. www.linphone.org.
5. Monsoon power monitor. http://goo.gl/spM1pt. Monsoon power monitor. http://goo.gl/spM1pt.