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• Skipping incompatible libmp3lame.a while searching mp3lame (FFMPEG)

  19 octobre 2014, par trololo

  I want to compile ffmpeg with libmp3lame for my Android app. I’m using Virtual Machine with OS Debian.
  While compiling I recieve with message in Console.log file :

  skipping incompatible /home/sla/ffmpeg_build/lib/libmp3lame.a while searching mp3lame
  ...

  That’s why compilations doesn’t work properly.

  I’ve installed lame for debian using this code install.sh :
  (https://trac.ffmpeg.org/wiki/CompilationGuide/Ubuntu)

  sudo apt-get install libmp3lame-dev
  
  mkdir /home/sla/ffmpeg_build
  
  mkdir /home/sla/ffmpeg_sources
  
  sudo apt-get install nasm
  
  cd /home/sla/ffmpeg_sources
  
  wget http://downloads.sourceforge.net/project/lame/lame/3.99/lame-3.99.5.tar.gz
  
  tar xzvf lame-3.99.5.tar.gz
  
  cd lame-3.99.5
  
  ./configure --prefix="/home/sla/ffmpeg_build" --enable-nasm --disable-shared
  
  make
  
  make install
  
  make distclean

  But it doesn’t work (lame compiles but ffmpeg - doesn’t).
  ffmpeg compiler says something strange.

  For ffmpeg I wrote flags :

  --export-cflags
  
  -I/home/sla/ffmpeg_build/include
  
  
  
  --export-ldflags
  
  -L/home/sla/ffmpeg_build/lib

  How to fix it ?

• Use ffmpeg to create a music video with the cover on a black background

  21 septembre 2020, par user6329530

  I am trying to use this tutorial to create youtube videos with ffmpeg
https://trac.ffmpeg.org/wiki/Encode/YouTube

  


  When using this example, I get a video that works however the background is white

  


  ffmpeg -loop 1 -framerate 2 -i albumcover.png -i audio.wav -c:v libx264 -preset medium -tune stillimage -crf 18 -c:a copy -shortest -pix_fmt yuv420p output.mkv


  


  I tried to add a color filter but that makes the whole video output black :

  


  ffmpeg -loop 1 -framerate 2 -i albumcover.png -filter_complex "color=s=1920x1080:c=black" -i audio.wav -c:v libx264 -preset medium -tune stillimage -crf 18 -c:a copy -shortest -pix_fmt yuv420p output.mkv


  


  I find it very difficult to find something about this on the internet as most ask for just a black video or a transparent background for a gif ect.

  


  So how do I get the albumcover.png on a black background ?

  


  EDIT : I just realized that the video format is of course the image format (square) and therefore it's white on youtube. The question therefore is now how do I create a black background 16:9 and put the albumcover centered on it...

  


• FFMPEG - build ubuntu 32 bit - missing shared library : libspeex

  29 avril 2013, par Benoit Brayer

  I am currently doing a cross platform software calling ffmpeg in c++ and I need a ffmpeg build working on both ubuntu 32bits and 64bits for the installer.
  I also need this ffmpeg build to include librtmp, libh264, x11-grab, alsa, and mp3.

  I tried to compile ffmpeg on a 32bits virtual box to have a ffmpeg build working on ubuntu 32 bits and 62 bits.

  I used this guide to build ffmpeg :
  https://ffmpeg.org/trac/ffmpeg/wiki/UbuntuCompilationGuide

  After compiling all the libs and ffmpeg himself, after installation using the deb files, ffmpeg is working perfectly on the 32bits virtualbox with all of my required components but not on my 62bits ubuntu.

  When executing ffmpeg on ubuntu 64bits i got a message saying : impossible find the shared library libspeex.

  Do you have any idea why I have this problem only on linux 64bits with the save deb files ?
  Do you know a website where i could find an ffmpeg 32bits build with all the components I need (static if possible) ?
  I tried this website http://ffmpeg.gusari.org/static/ but the build is not including alsa...

  I have a build for windows working perfectly, I downloaded the 32 bits static build on this website : zeranoe builds website for windows.

  Thanks in advance for any answer.
  Regards.

  Benoit Brayer