well if you want .sseq or indeed any format not already in ffmpeg then make the patch , they always say "patches welcome" after all
as for streaming, right now your probably better waiting on or even helping with kieran's broadcastencoder https://github.com/kierank/broadcastencoder/wiki to be honest, if you really Need/Want an option you cant live without or cant find anywhere else in x264/ffmpeg, he's open to options you might like right now apparently if your quick.
yes, swar is done, but I'll comit it after I done .nsf too. I'm in struggle with finding truly convertor\extractor .nsf sounds from .smc games, if anybody know, please point me.
Anybody use wired thing like avivo? It's not just forgiven?