Comment by klodolph

I like to use Makefiles for parallel encoding.

    OPUSFLAGS = --vbr --bitrate 16
    all: $(patsubst %.wav,%.opus,$(wildcard *.wav))
    .PHONY: all
    %.opus: %.wav
        opusenc $(OPUSFLAGS) $< $@

Make -j4 or whatever. There are a few other ways to do this (e.g. xargs).