• Compression Techniques

  ffmpeg Unknown encoder ‘mpeg4aac’

  Posted by Jefferson Goven on June 30, 2011 at 3:49 pm

  Hello,

  I am having a problem i just recompile ffmpeg (I install it by doing:
  apt-get install dpkg-dev
  apt-get source ffmpeg
  apt-get build-dep ffmpeg
  cd ffmpegcvs-20070329

  Then i edit this file and i had at the end of the CONFIG_ALL
  ­nano debian/rules

  –enable-decoder=mpeg4aac –enable-encoder=mpeg4aac

  Then i do
  dpkg-buildpackage
  cd ..
  dpkg -i *.deb

  cd ffmpegcvs-20070329
  /debian/rules configure
  /debian/rules build
  and then make install
  )

  When i try to convert a video by using the audio codec mpeg4aac (a .3gp file to a .mp4 file):

  root: /usr/bin/ffmpeg -i foxmedia_simulated_gent1.3gp -y -b 96k -s vga -vcodec mpeg4 -r 25 -aspect 1:1 -ar 44100 -acodec mpeg4aac -ac 2 -ab 12.k -t 3 test.mp4

  FFmpeg version SVN-r13582, Copyright (c) 2000-2008 Fabrice Bellard, et al.
  configuration: –prefix=/usr –libdir=${prefix}/lib –shlibdir=${prefix}/lib –bindir=${prefix}/bin –incdir=${prefix}/include/ffmpeg –enable-libmp3lame –enable-gpl –enable-libfaad –mandir=${prefix}/share/man –enable-libvorbis –enable-pthreads –enable-libfaac –enable-libxvid –enable-postproc –enable-libamr-nb –enable-libamr-wb –enable-x11grab –enable-libgsm –enable-libx264 –enable-liba52 –enable-libtheora –extra-cflags=-Wall -g -fPIC -DPIC –cc=ccache cc –enable-swscale –enable-libdc1394 –enable-nonfree –disable-mmx –disable-stripping –enable-avfilter –enable-libdirac –disable-decoder=libdirac –enable-libschroedinger –disable-encoder=libschroedinger –enable-decoder=mpeg4aac –enable-encoder=mpeg4aac –disable-altivec –disable-armv5te –disable-armv6 –disable-vis
  libavutil version: 49.7.0
  libavcodec version: 51.58.0
  libavformat version: 52.16.0
  libavdevice version: 52.0.0
  libavfilter version: 0.0.0
  built on Jun 30 2011 15:11:10, gcc: 4.1.2 20061115 (prerelease) (Debian 4.1.1-21)
  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from ‘foxmedia_simulated_gent1.3gp’:
  Duration: 00:01:00.22, start: 0.000000, bitrate: 255 kb/s
  Stream #0.0(eng): Audio: libfaad, 16000 Hz, stereo
  Stream #0.1(eng): Video: h264, yuv420p, 320×240, 14.98 tb(r)
  Unknown encoder ‘mpeg4aac’

  Help me please I didn’ t find the good answer on the web?

  Thanks Jeff

  Michael Rampe replied 15 years, 1 month ago 2 Members · 1 Reply
• 1 Reply

• 

  Michael Rampe

  July 4, 2011 at 12:46 am

  [jefferson Goven] “FFmpeg version SVN-r13582, Copyright (c) 2000-2008 Fabrice Bellard, et al.”

  This is a very old version. I recommend upgrading to a newer version.

  Also, the library specifically related to this is libfaac.

  Michael

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