The VideoLAN Forums

Posted: **30 Sep 2009 21:30**

Hi guys,

I have problem with VLC not being able to stream via RTP protocol. I want to encode stream to mp3, h264 and AAC audio. While encoding video is just fine, VLC shouts at me that my FFMPEG installation is "crippled" . I guess ffmpeg package doesn't have AAC suport compiled in.

My command line is:

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vlc -vvv -I rc v4l2:// :v4l2-adev=/dev/dsp :input-slave=oss:// --sout "#transcode{venc=x264{keyint=60},vcodec=x264,vb=50,scale=1,width=160,height=140,acodec=aac,ab=32,channels=2,samplerate=22050}:rtp{dst=XXX.XXX.XXX.XXX,port=5432,sdp=http://0.0.0.0:5050/vlc.sdp}"

And error message printed out by VLC is:

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[0x22afce8] avcodec encoder debug: libavcodec initialized (interface 0x341400)
[0x22afce8] avcodec encoder error: cannot find encoder MPEG AAC Audio
*** Your FFMPEG installation is crippled.   ***
*** Please check with your FFMPEG packager. ***
*** This is NOT a VLC media player issue.   ***
[0x22afce8] main encoder error: Streaming / Transcoding failed
[0x22afce8] main encoder error: It seems your FFMPEG (libavcodec) installation lacks the following encoder:
MPEG AAC Audio.
If you don't know how to fix this, ask for support from your distribution.

This is not an error inside VLC media player.
Do not contact the VideoLAN project about this issue.

FFMPEG says it was compiled with options:

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FFmpeg version SVN-r19352-4:0.5+svn20090706-2ubuntu1, Copyright (c) 2000-2009 Fabrice Bellard, et al.
  configuration: --extra-version=4:0.5+svn20090706-2ubuntu1 --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 Aug 26 2009 09:45:20, gcc: 4.4.1
At least one output file must be specified

Any ideas? Am I doing something wrong? Is only solution to re-compile ffmpeg with AAC support?

Posted: **30 Sep 2009 22:01**

Ugh, I have spent whole day trying to do it and now when I came back it was 15 mins enough to do so... need to take break more often.

Here is what I did to enable VLC AAC output (and ffmpeg AAC in general) in plain Ubuntu 9.10 install:

Get building tools if you don't have yet:

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sudo apt-get install build-essential fakeroot dpkg-dev

Get build dependencies for ffmpeg:

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apt-get build-dep ffmpeg

Get ffmpeg's deb sources:

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apt-get source ffmpeg

Get faac codec for AAC:

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apt-get install faac libfaac0 libfaac-dev

Do something (extract?) sources:

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dpkg-source -x ffmpeg_0.5+svn20090706-2ubuntu1.dsc

Compile ffmpeg:

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cd ffmpeg_0.5+svn20090706 && DEB_BUILD_OPTIONS="--enable-faac" fakeroot debian/rules binary

Install ffmpeg and it's libraries that were packaged separately.

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cd .. && dpkg -i *.deb

Proper VLC command for streaming MP4 with AAC is:

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vlc -vvv -I rc v4l2:// :v4l2-adev=/dev/dsp :input-slave=oss:// --sout "#transcode{venc=x264{keyint=60},vcodec=x264,vb=50,scale=1,width=160,height=140,acodec=mp4a,ab=32,channels=2,samplerate=22050}:rtp{dst=XXX.XXX.XXX.XXX,port=5432,sdp=http://0.0.0.0:5050/vlc.sdp}"

Voila!

Posted: **02 Dec 2009 01:04**

I had the same problem. After update to Ubuntu 9.10 no stream. Same Error

Little changes for me

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dpkg-source -x ffmpeg_0.5+svn20090706-2ubuntu2.dsc

Remove all ffmpeg and it's libraries packages befor installing. I used the packetmanager and uninstalled vlc too.

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sudo dpkg -i *.deb

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sudo apt-get install vlc

Now my TV Stream works on my amd64 again

Thanks hubertlepicki!!!
Without your step by step commands I would never have made it so fast.

Posted: **02 Dec 2009 04:57**

This didn't work for me...

What vlc version are you using? and are you downloading from the official repositories?

Posted: **02 Dec 2009 16:22**

Ok, it actually works.

You just need to follow these steps, and only after, reinstall vlc.

Posted: **29 Jun 2010 11:17**

I had the same problem on Ubuntu 10.04. The solution is clear:

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mkdir ffmpeg                               # make directory for building ffmpeg
cd ffmpeg                                  # go into created directory
sudo aptitude install apt-src libfaac-dev  # install apt-src and FAAC library, version 
                                           # for development
sudo apt-src install ffmpeg                # get ffmpeg sources and automatically install 
                                           # all build dependencies
sudo chown -R myusername *                 # change owner of getted sources because they 
                                           # are downloaded under sudo and have root as owner
cd ffmpeg-0.5.1                            # go into source tree
debuild -us -uc                            # build ffmpeg packages, libfaac will be detected 
                                           # and enabled automatically
cd ..                                      # go back to source package directory
sudo dpkg -i *.deb                         # install builded packages

Posted: **14 Feb 2011 14:11**

I followed the instructions in the last post and it works, but on my system where I don't usually compile by myself, it is kind of overkill. I have to install 150 new packages with 380MB installation size, 980MB of code (source before and the compiled code after) and about half an hour of time (with my pc) for this "little" feature.

A much easier and more appropiate way, especially for less experienced users, is in my opinion adding medibuntu non-free repositories and reinstall ffmpeg. More details I found here: http://www.whynotwiki.com/Problem:_ffmp ... 10_to_8.04

Maybe this will help the next one finding this thread via google.

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