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MP3 / Re: Low bitrate MP3 (+ unsupported bitrates)
Last post by maikmerten -Now i'm tried opus and it sounds horrible for 16kbps and 8kbps compared to MP3. Also it does not support 11025Hz, 22050Hz, and 44100Hz while these are my target sampling rates.
That's very unexpected. Opus should do *much* better than MP3 at such exceedingly low bitrates. Do you have an example file to toy around with?
Edit: If you happen to encode with ffmpeg: Don't use the interal Opus encoder, use libopus.
Edit2: One can encode non-standard bitrates in MP3 in "free format" mode. For instance "lame -b 18 --freeformat music.wav freeformat.mp3". This is, however, non-standard and needs a supporting decoder. This throws away most of the compatibility benefit MP3 has.
Edit3: Also, of course, one can do ABR-encoding with a bitrate target of 18 or 20 kbps.