@@$ ls
track1.chapters  track1.mp3
@@$ ffmpeg -i "track1.mp3" -y -vn -acodec libfaac -ab 128k -ar 44100 -threads 3 -f mp4 track1.aac
FFmpeg version SVN-r19352-4:0.5+svn20090706-2ubuntu2, Copyright (c) 2000-2009 Fabrice Bellard, et al.
  configuration: --extra-version=4:0.5+svn20090706-2ubuntu2 --prefix=/usr --enable-avfilter --enable-avfilter-lavf --enable-vdpau --enable-bzlib --enable-libgsm --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-libvorbis --enable-pthreads --enable-zlib --disable-stripping --disable-vhook --enable-gpl --enable-postproc --enable-swscale --enable-x11grab --enable-libdc1394 --extra-cflags=-I/build/buildd/ffmpeg-0.5+svn20090706/debian/include --enable-shared --disable-static
  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 Oct 13 2009 22:15:16, gcc: 4.4.1
Input #0, mp3, from 'track1.mp3':
  Duration: 00:18:58.13, start: 0.000000, bitrate: 128 kb/s
    Stream #0.0: Audio: mp3, 44100 Hz, stereo, s16, 128 kb/s
Output #0, mp4, to 'track1.aac':
    Stream #0.0: Audio: libfaac, 44100 Hz, stereo, s16, 128 kb/s
Stream mapping:
  Stream #0.0 -> #0.0
Press [q] to stop encoding
size=   18131kB time=1137.96 bitrate= 130.5kbits/s
video:0kB audio:17747kB global headers:0kB muxing overhead 2.161185%
@@$ MP4Box -add track1.aac -chap track1.chapters test.mp4
IsoMedia import - track ID 1 - Audio (SR 44100 - 2 channels)
Converting to ISMA Audio-Video MP4 file...
Saving to test.mp4: 0.500 secs Interleaving
@@$ mp4chaps --convert --chapter-qt test.mp4
converting chapters in file "test.mp4" from Nero to QuickTime
@@$ mv test.mp4 test.m4b
@@$ ls
test.m4b  track1.aac  track1.chapters  track1.mp3