[FFmpeg-user] post-encode stream mapping

[Reuben Martin]

Is it possible to map an encoded stream to multiple muxers for the purpose
of encoding once for multiple outputs?

I want to encode 3 separate outputs from the same input. (3 different
resolutions of the same video) However the audio will be encoded the same
for all 3. So it is possible to encode the audio once, and pass it to all 3
of the muxers? I know re-encoding the same audio 3 times for each output is
not all that intensive, but this is for live video, and the system is
almost at limit. Any small reduction in process load is a plus.

(Stream-copy is not an option in this scenario.)

-Reuben