Re: Low bitrate MP3 (+ unsupported bitrates)
Reply #8 – 2024-04-16 23:41:15
@Klymins , when people ask about extremely uncommon things without giving a use case where such things would seem appropriate, there is a temptation to assume that the person is solving an XY problem , e.g. how to hammer nails with a microscope. Could you explain why a specific bitrate, CBR mode and mono sound are important to you? Take, for example, the point-n-click adventure game Broken Sword (1996), where the audio is mostly stored as 11025 Hz 16 bit mono. I'm going to compress a fragment, which contains speech and music, using Fraunhofer 3.1 (CBR), GXLame 5.3 (CBR & VBR), Helix 5.2.3 (VBR with forced resampling to 22.05 kHz), and Vorbis Aotuv 6.03 (VBR).$ mp3enc.exe -br 24000 -esr 11025 -if history.wav -of history.frau.11khz.cbr.br24000.mp3 $ gxlame.exe -b 24 -h history.wav history.gxlame.11khz.cbr.b24h.mp3 $ gxlame.exe -V# -h history.wav history.gxlame.11khz.vbr.v#h.mp3 (# = 24, 32, 40) $ hmp3.exe -V24 history.wav history.helix.22khz.vbr.V24.mp3 $ oggenc2.exe history.wav -q # -o history.aotuv.11khz.vbr.q#.ogg (# = -1, 0, 1) Bytes Kbps Filename -------- ------ ------------------------------- 34 913 17 history.aotuv.vbr.q-1.ogg 37 599 18 history.gxlame.vbr.v24h.mp3 41 814 20 history.gxlame.vbr.v32h.mp3 47 330 22 history.gxlame.vbr.v40h.mp3 50 173 24 history.aotuv.vbr.q0.ogg 50 648 24 history.gxlame.cbr.b24h.mp3 51 095 24 history.frau.cbr.br24000.mp3 51 584 25 history.helix.vbr.V24.mp3 56 562 27 history.aotuv.vbr.q1.ogg
• Join our efforts to make Helix MP3 encoder great again • Opus complexity & qAAC dependence on Apple is an aberration from Vorbis & Musepack breakthroughs • Let's pray that D. Bryant improve WavPack hybrid, C. Helmrich update FSLAC, M. van Beurden teach FLAC to handle non-audio data