since 2011-01-03

wav を ogg に変換してみる：

$ ffmpeg -i 3.wav 3.ogg
FFmpeg version 0.5-svn17737+3:0.svn20090303-1ubuntu6.2, Copyright (c) 2000-2009
(omitted)
  libavutil     49.15. 0 / 49.15. 0
  libavcodec    52.20. 0 / 52.20. 0
  libavformat   52.31. 0 / 52.31. 0
  libavdevice   52. 1. 0 / 52. 1. 0
  libavfilter    0. 4. 0 /  0. 4. 0
  libswscale     0. 7. 1 /  0. 7. 1
  libpostproc   51. 2. 0 / 51. 2. 0
  built on Apr 23 2010 15:08:34, gcc: 4.3.3
Input #0, wav, from '3.wav':
  Duration: 00:00:01.00, bitrate: 255 kb/s
    Stream #0.0: Audio: pcm_s16le, 16000 Hz, mono, s16, 256 kb/s
Output #0, ogg, to '3.ogg':
    Stream #0.0: Audio: flac, 16000 Hz, mono, s16, 64 kb/s
Stream mapping:
  Stream #0.0 -> #0.0
Press [q] to stop encoding
size=      14kB time=1.01 bitrate= 113.4kbits/s
video:0kB audio:13kB global headers:0kB muxing overhead 3.896482%