Facebook-like chathead with camera preview and video/audio recording
CircularBuffer - Modifed from https://github.com/Petrakeas/CircularBuffer
Video/Audio encoder - Modified from https://github.com/saki4510t/AudioVideoRecordingSample
Android-Chathead - https://github.com/henrychuangtw/Android-ChatHead