Are there any codecs that can output multiple versions of an input at the same time? Seems like a lot of the encoding process (like motion estimation) is the same every time, so why do it once for every output instead of reusing it?
That would be interesting to know. A lot of transcoders can make multiple passes over the source, so being able to reuse the meta data generated for subsequent passes at different output qualities might help speed up the process. I dunno, not my forte, just thinking out loud.
