I'm Ronald and work on all kind of stuff in libavformat, and some in libavcodec. My contributions include:
- RDT / Realmedia and RTSP-MS / ASF support to the RTSP / RTP stack
- HTTP seeking
- Matroska demuxer
- WMAVoice and VP8 decoder
- H264 optimizations
I hope to some day write video encoders as well.