[FFmpeg-trac] #1457(avcodec:new): Add support for libshine-fxp fixed point math MP3 encoder

FFmpeg trac at avcodec.org
Mon Jun 18 01:51:13 CEST 2012

#1457: Add support for libshine-fxp fixed point math MP3 encoder
             Reporter:  patters      |                    Owner:
                 Type:  enhancement  |                   Status:  new
             Priority:  wish         |                Component:  avcodec
              Version:  git-master   |               Resolution:
             Keywords:               |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |

Comment (by patters):

 Sure, this was the test data I had linked to:

 3m48s WAV file ripped from CD (Aphex Twin - Pulsewidth.wav):
 libmp3lame 3.99-5 @128Kbps - encoded in 6m09s
 libshine @128Kbps - encoded in 42s
 libshine @320Kbps - encoded in 46s (Sounds perfectly fine on headphones to
 me, though my test track isn't ideal for assessing quality. Guitar music
 might be better to show up any problems).

 Both libmp3lame and libshine had audible artifacts at 128Kbps. I found it
 difficult to distinguish libshine at 320Kbps from the source WAV.

 Re your comment, as far as I understood [http://en.wikipedia.org/wiki/MP3
 mp2 audio sampling rate is limited to 24000Hz] so it's not really
 sufficient for typical music streaming requirements which tend to demand

 I'll update the ticket again tomorrow with some more test results and
 quality comparisons.

Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/1457#comment:3>
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