* The libraries can be used to stream, receive, and process MPEG, H.265, H.264, H.263+, DV or JPEG video, and several audio codecs. * They can easily be extended to support additional (audio and/or video) codecs, and can also be used to build basic RTSP or SIP clients and servers, and have been used to add streaming support to existing media player applications, such as "VLC" and "MPlayer".

* Capture and playback from various platform dependent sound architectures (ALSA, PulseAudio, AudioUnit, AudioQueue, WaveApi, WASAPI, Android AudioTrack/AudioRecord, Android OpenSLES) * Send and receive RTP streams * Encode and decode the following audio formats: OPUS, speex, G711, GSM, iLBC, AMR, AMR-WB, G722, SILK, G729 * Encode and decode the following video formats: VP8 (WebM), H263, H263-1998, MPEG4, theora and H264 (thanks to a plugin based on OpenH264), with resolutions up to 1080P * RTP/AVPF support: RTCP control messages for video error recovery: PLI, SLI, RPSI, FIR. * Audio conferencing * Supports SRTP and zRTP (encryption of voice and video) * Supports any webcam, based on OS's camera API: quicktime, directshow, video4linux, android.camera * Acoustic echo cancellation using the speex echo canceler or webrtc AECm. * Read and write from/to a wav file * Optimized rendering of YUV pictures, using openGL, DrawDib, X11/Xv * Dual tones generation * Custom tone detector * Audio parametric equalizer * Volume control, automatic gain control * ICE for optimized NAT traversal (RFC5245) to allow peer to peer audio & video connections without media relay server * Adaptive bit rate control algorithm: for automatic adaption of encoder bit rate based on received RTCP feedback. * Can use plugins: to add new codecs, new sound input/output backend...