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• Combine Image and Audio AND fade in and out

  7 janvier 2024, par Jake

  I have an ffmpeg command that merges 1 image and 1 audio file, but I also want the output video to have a fade in and fade out, how can I do that ?

  


  Here's the command :
ffmpeg -r 1 -loop 1 -i image.jpg -i audio.mp3 -acodec copy -r 1 -shortest -vf scale=1280:720 final.mp4

  


• Why my ffmpeg libs are so large ? [on hold]

  9 avril 2014, par user3504221

  I compiled ffmpeg libs on my Ubuntu 64-bits using the following script :

     mkdir ~/ffmpeg_sources

  #x264

  cd ~/ffmpeg_sources
  
     wget http://download.videolan.org/pub/x264/snapshots/last_x264.tar.bz2
  
     tar xjvf last_x264.tar.bz2
  
     cd x264-snapshot*
  
     ./configure --prefix="$HOME/ffmpeg_build" --bindir="$HOME/bin" --enable-static --disable-asm
  
     make
  
     make install
  
     make distclean

  #FFmpeg

  cd ~/ffmpeg_sources
  
     wget http://ffmpeg.org/releases/ffmpeg-snapshot.tar.bz2
  
     tar xjvf ffmpeg-snapshot.tar.bz2
  
     cd ffmpeg
  
     PKG_CONFIG_PATH="$HOME/ffmpeg_build/lib/pkgconfig"
  
     export PKG_CONFIG_PATH
  
     ./configure --prefix="$HOME/ffmpeg_build" --extra-cflags="-I$HOME/ffmpeg_build/include" \
  
     --extra-ldflags="-L$HOME/ffmpeg_build/lib" --bindir="$HOME/bin" --extra-libs="-ldl" --   enable-gpl \
  
    --enable-libx264 --enable-x11grab --disable-yasm                                                                                                                               
  
     make
  
     make install
  
     make distclean
  
     hash -r

  But the final libs are really large (For example, libavcodec.a > 140 Mb). Anybody know why my libs are so large ?

  EDIT

  My Solutions :

  • add the option "—disable-debug" to the ./configure. The size of my libavcodec fell from 150Mb to 12Mb !
  • Remove all unnecessary codecs : Add the options -disable-encoders, —disable-decoders and then add only codecs you want with —enable-encoder=NAME and —enable-decoder=NAME. Print the list using ./configure —list-encoders —list-decoders. see ./configure —help for more information. (My final libavcodec has a size of 4Mo)

• FFMPEG Video Multiplexer

  4 décembre 2015, par Nader

  I am a DirectShow developer, I used to build multiplexers that take 2 video inputs and generate one output, I would then use a video encoder mux to feed it the output + anothrr audio stream to generate the final video output. The multiplexer (DirectShow framework) allows me to process the input video from two sources (for example, adding effects using the two frames).
  Does anyone know how this can be done using FFMPEG, or at least point me to the right resources ? Thanks