De quel codec ai-je besoin pour épisser un fichier mp4 avec ffmpeg?

Je suis sûr d'avoir installé tous les packages nécessaires ... voici ma tentative de découper les 14 premières minutes de ma vidéo.

meder@meder-desktop:/media/12dbbb01-4f96-433d-96a0-9b6c88598a51$ sudo ffmpeg -i HDV_0178.MP4 -ss 00:00:00 -t 00:14:32 out.mp4 -acodec copy
FFmpeg version SVN-r0.5.1-4:0.5.1-1ubuntu1, Copyright (c) 2000-2009 Fabrice Bellard, et al.
  configuration: --extra-version=4:0.5.1-1ubuntu1 --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-runtime-cpudetect --enable-gpl --enable-postproc --enable-swscale --enable-x11grab --enable-libdc1394 --enable-shared --disable-static
  libavutil     49.15. 0 / 49.15. 0
  libavcodec    52.20. 1 / 52.20. 1
  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 Mar  4 2010 12:35:30, gcc: 4.4.3

Seems stream 0 codec frame rate differs from container frame rate: 180000.00 (180000/1) -> 59.94 (60000/1001)
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'HDV_0178.MP4':
  Duration: 00:17:51.85, start: 0.000000, bitrate: 12134 kb/s
    Stream #0.0(eng): Video: h264, yuv420p, 1280x720, 59.94 tbr, 90k tbn, 180k tbc
    Stream #0.1(eng): Audio: aac, 48000 Hz, stereo, s16
File 'out.mp4' already exists. Overwrite ? [y/N] y
Output #0, mp4, to 'out.mp4':
    Stream #0.0(eng): Video: mpeg4, yuv420p, 1280x720, q=2-31, 200 kb/s, 90k tbn, 59.94 tbc
    Stream #0.1(eng): Audio: 0x0000, 48000 Hz, stereo, s16, 64 kb/s
Stream mapping:
  Stream #0.0 -> #0.0
  Stream #0.1 -> #0.1
Unsupported codec for output stream #0.1

Dois-je recompiler ffmpeg ou y at-il un moyen de récupérer le codec audio nécessaire?

mettre -acodec copy avant out.mp4. citant la page de manuel de ffmpeg:

 As a general rule, options are applied to the next specified file. For
 example, if you give the -b 64 option, it sets the video bitrate of the
 next file. Format option may be needed for raw input files.