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Comment by ynniv | Hacker News Reader

I'm impressed with the state of 32kbit AAC streams. You could fit almost 6 minutes of that onto a floppy, and the quality is much higher than an 8-bit MP3

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How's Opus for this sort of thing?

One can play around with Opus by exporting audio streams from existing video and audio

    ffmpeg -i sample.avi -map a out.wav

and then encoding that wav to opus

    opusenc --downmix-mono --bitrate 32 --vbr out.wav cor.opus

to decode

    opusdec cor.opus final.wav

and then

    play final.wav

brew install opus-tools sox ffmpeg

Or in one command:

ffmpeg -i sample.avi -acodec libopus -b:a 32k -map a sample.opus

In listening tests Opus typically outperforms HE-AAC by a fair margin. This is for 64 Kbit/s and under.

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