Ah, I still remember those days when FFmpeg got one new decoder once week or two.
Mike once mentioned here that one coder searches for ideas to implement. My situation is rather complimentary – I hardly manage to fullfill all requests from other people. Recently I’ve added two image decoders to FFmpeg – Targa (.tga) and TIFF. Both of them were done by request. The same situation was with Worms Video.
WavPack decoder was written by my own wish but there are already some people asking to write MPEG-4 ALS and Monkey’s Audio decoders. While the later is not possible to implement right now, I’ll implement both MP4 ALS decoder and encoder.