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• How to change mp4 aspect ratio to 16:9 using ffmpeg ?

  20 février 2023, par user1788736

  I got an mp4 video that I copy 4 minute of it using ffmpeg. After uploading to YouTube I noticed the uploaded video has black bars on both side of video(right and left side) !After searching for a way to remove those black bars I found that I need to use yt:stretch=16:9 !However,using yt:stretch=16.9 tag will not remove the black bars on iPhone and Samsung smart tv YouTube app !

  



  could an expert help me change the aspect ratio of original mp4 video to 16:9 using ffmpeg (without losing video quality) for re uploading to YouTube ? Thanks in advance ?

  



  I got two types of source with following information :

  



  1)Resolution:720x576 ,Frame rate:25 . Codec:H264 - MPEG-4 AVC(part 10)(avc1),
2)Resolution:848x480 , Frame rate:24.804393,Codec:H264 - MPEG-4 AVC(part 10)(avc1)


  



  ffmpeg code used to trim the original video :

  



     ffmpeg -i orginalVideo.mp4 -ss 00:25:55 -t 00:04:02 -acodec copy -vcodec copy videoForYoutube.mp4


  


• ffmpeg video created from images looks faded [closed]

  17 avril 2024, par Oscar Franco

  I'm creating a video from a series of png images I have generated. However, on the final video the colors look faded. Is there anyway to preserve the look of the images ?

  


  Here is a sample image, it might be a little hard to tell due to compression but the hue of the green changes.

  


  

  


  

  


  Here are some of the commands I've used trying to get the colors to match :

  


  ffmpeg -framerate 60 -pattern_type glob -i 'capture/*.png' -c:v libx264 -preset slower -pix_fmt yuv420p -color_range tv -colorspace bt709 -color_primaries bt709 -color_trc iec61966-2-1 out.mp4


  


  ffmpeg -framerate 60 -pattern_type glob -i 'capture/*.png' -c:v h264 -x264opts colormatrix=bt709 out.mp4


  


• Unable to install ffmpeg on CircleCi Ubuntu 14.04

  28 juillet 2017, par Mateusz Urbański

  I have Ruby on Rails project which uses CircleCI for continuous deployment. I’m trying to install ffmpeg because I need this to make all of my specs green. Unfortunately I’m not able to do that. I’ve read a lot of different topics but I didn’t find any solution for that. Currently I’m installing ffmpeg in the following way :

  cd ~/ffmpeg_sources
  
  wget http://ffmpeg.org/releases/ffmpeg-snapshot.tar.bz2
  
  tar xjvf ffmpeg-snapshot.tar.bz2
  
  cd ffmpeg
  
  PATH="$PATH:$HOME/bin" PKG_CONFIG_PATH="$HOME/ffmpeg_build/lib/pkgconfig" ./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-libass \
  
    --enable-libfdk-aac \
  
    --enable-libfreetype \
  
    --enable-libmp3lame \
  
    --enable-libopus \
  
    --enable-libtheora \
  
    --enable-libvorbis \
  
    --enable-libvpx \
  
    --enable-libx264 \
  
    --enable-nonfree \
  
    --enable-x11grab
  
  PATH="$PATH:$HOME/bin" make
  
  sudo make install
  
  sudo make distclean
  
  hash -r

  I didn’t see any errors in the console but when I run my specs some of them failing because of missing ffmpeg library. How can I solve this problem ?