./ffmpeg/ffmpeg -loglevel debug -acodec mp3float -i 1.mp3 1.mp3.ffmpeg.mp3float.wav

ffmpeg version git-N-29946-g27614b1, Copyright (c) 2000-2011 the FFmpeg developers
  built on May 15 2011 18:04:36 with gcc 4.4.5
  configuration: 
  libavutil    51.  2. 1 / 51.  2. 1
  libavcodec   53.  5. 0 / 53.  5. 0
  libavformat  53.  0. 3 / 53.  0. 3
  libavdevice  53.  0. 0 / 53.  0. 0
  libavfilter   2.  5. 0 /  2.  5. 0
  libswscale    0. 14. 0 /  0. 14. 0
[NULL @ 0x1fc9d80] Format mp3 probed with size=2048 and score=51
[mp3 @ 0x1fcbd40] mdb:418, lastbuf:0 skipping granule 0
    Last message repeated 1 times
[mp3 @ 0x1fcbd40] mdb:418, lastbuf:0 skipping granule 1
    Last message repeated 1 times
[mp3 @ 0x1fc9d80] Estimating duration from bitrate, this may be inaccurate
Input #0, mp3, from '1.mp3':
  Duration: 00:00:03.00, start: 0.000000, bitrate: 192 kb/s
    Stream #0.0, 115, 1/14112000: Audio: mp3, 44100 Hz, stereo, s16, 192 kb/s
Output #0, wav, to '1.mp3.ffmpeg.mp3float.wav':
  Metadata:
    encoder         : Lavf53.0.3
    Stream #0.0, 0, 1/44100: Audio: pcm_s16le, 44100 Hz, stereo, s16, 1411 kb/s
Stream mapping:
  Stream #0.0 -> #0.0
Press [q] to stop, [?] for help
[mp3float @ 0x1fcbd40] mdb:418, lastbuf:0 skipping granule 0
    Last message repeated 1 times
[mp3float @ 0x1fcbd40] mdb:418, lastbuf:0 skipping granule 1
    Last message repeated 1 times
Input stream #0.0 frame changed from rate:44100 fmt:s16 ch:2 to rate:44100 fmt:flt ch:2
Warning, using s16 intermediate sample format for resampling
size=     518kB time=3.00 bitrate=1411.3kbits/s    
video:0kB audio:518kB global headers:0kB muxing overhead 0.008303%




./ffmpeg/ffmpeg -loglevel debug -acodec mp3float -i 2.mp3 2.mp3.ffmpeg.mp3float.wav

ffmpeg version git-N-29946-g27614b1, Copyright (c) 2000-2011 the FFmpeg developers
  built on May 15 2011 18:04:36 with gcc 4.4.5
  configuration: 
  libavutil    51.  2. 1 / 51.  2. 1
  libavcodec   53.  5. 0 / 53.  5. 0
  libavformat  53.  0. 3 / 53.  0. 3
  libavdevice  53.  0. 0 / 53.  0. 0
  libavfilter   2.  5. 0 /  2.  5. 0
  libswscale    0. 14. 0 /  0. 14. 0
[NULL @ 0x1311d80] Format mp3 probed with size=4096 and score=51
[mp3 @ 0x1311d80] Estimating duration from bitrate, this may be inaccurate
Input #0, mp3, from '2.mp3':
  Duration: 00:00:01.01, start: 0.000000, bitrate: 320 kb/s
    Stream #0.0, 39, 1/14112000: Audio: mp3, 44100 Hz, stereo, s16, 320 kb/s
Output #0, wav, to '2.mp3.ffmpeg.mp3float.wav':
  Metadata:
    encoder         : Lavf53.0.3
    Stream #0.0, 0, 1/44100: Audio: pcm_s16le, 44100 Hz, stereo, s16, 1411 kb/s
Stream mapping:
  Stream #0.0 -> #0.0
Press [q] to stop, [?] for help
Input stream #0.0 frame changed from rate:44100 fmt:s16 ch:2 to rate:44100 fmt:flt ch:2
Warning, using s16 intermediate sample format for resampling
size=     176kB time=1.02 bitrate=1411.5kbits/s    
video:0kB audio:176kB global headers:0kB muxing overhead 0.024484%




./ffmpeg/ffmpeg -loglevel debug -acodec mp3float -i 3.mp3 3.mp3.ffmpeg.mp3float.wav

ffmpeg version git-N-29946-g27614b1, Copyright (c) 2000-2011 the FFmpeg developers
  built on May 15 2011 18:04:36 with gcc 4.4.5
  configuration: 
  libavutil    51.  2. 1 / 51.  2. 1
  libavcodec   53.  5. 0 / 53.  5. 0
  libavformat  53.  0. 3 / 53.  0. 3
  libavdevice  53.  0. 0 / 53.  0. 0
  libavfilter   2.  5. 0 /  2.  5. 0
  libswscale    0. 14. 0 /  0. 14. 0
[NULL @ 0x1b30d80] Format mp3 probed with size=2048 and score=51
[mp3 @ 0x1b32d40] mdb:438, lastbuf:0 skipping granule 0
    Last message repeated 1 times
[mp3 @ 0x1b32d40] mdb:438, lastbuf:0 skipping granule 1
    Last message repeated 1 times
[mp3 @ 0x1b30d80] max_analyze_duration reached
[mp3 @ 0x1b30d80] Estimating duration from bitrate, this may be inaccurate
Input #0, mp3, from '3.mp3':
  Duration: 00:00:06.00, start: 0.000000, bitrate: 127 kb/s
    Stream #0.0, 194, 1/14112000: Audio: mp3, 44100 Hz, stereo, s16, 128 kb/s
Output #0, wav, to '3.mp3.ffmpeg.mp3float.wav':
  Metadata:
    encoder         : Lavf53.0.3
    Stream #0.0, 0, 1/44100: Audio: pcm_s16le, 44100 Hz, stereo, s16, 1411 kb/s
Stream mapping:
  Stream #0.0 -> #0.0
Press [q] to stop, [?] for help
[mp3float @ 0x1b32d40] mdb:438, lastbuf:0 skipping granule 0
    Last message repeated 1 times
[mp3float @ 0x1b32d40] mdb:438, lastbuf:0 skipping granule 1
    Last message repeated 1 times
Input stream #0.0 frame changed from rate:44100 fmt:s16 ch:2 to rate:44100 fmt:flt ch:2
Warning, using s16 intermediate sample format for resampling
[mp3float @ 0x1b32d40] mdb:389, lastbuf:382 skipping granule 0
size=    1035kB time=6.01 bitrate=1411.3kbits/s    
video:0kB audio:1035kB global headers:0kB muxing overhead 0.004152%