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• Compiling custom FFMPEG

  25 novembre 2019, par Arttu

  I need to compile ffmpeg from source for CentOS. The goal it to convert MP3 and WAV to FLAC. I tried to compile ffmpeg with this guide : https://trac.ffmpeg.org/wiki/CompilationGuide/Centos
  and it worked fine, but took approximately 20min and compiled a bunch unnecessary things, even thought I did not used next options as recommended in guide, but used :

  PATH="$HOME/bin:$PATH" PKG_CONFIG_PATH="$HOME/ffmpeg_build/lib/pkgconfig" ./configure \
  
  --prefix="/opt/tmg/ffmpeg_build" \
  
  --pkg-config-flags="--static" \
  
  --extra-cflags="-I/opt/tmg/ffmpeg_build/include" \
  
  --extra-ldflags="-L/opt/tmg/ffmpeg_build/lib" \
  
  --extra-libs=-lpthread \
  
  --extra-libs=-lm \
  
  --bindir="/opt/tmg/ffmpeg_build/bin" \
  
  --enable-gpl \
  
  --enable-libfreetype

  My question is what do I need for MP3 and WAV to FLAC and how do I compile just that part ?

  I found in configuration --disable-all option, but what do I have to enable ?

  Thanks in advance.

• how do I only run ffmpeg if not currently running

  6 juin 2019, par RobertW

  I have a script that runs every 10 minutes which causes ffmpeg to run over and over and really slows it down. I’d like to only run one instance at a time so the movies will appear quicker on my website (And not crash my server).

  Here is my code :

  for i in MovieCategories/Category1/*/*.mkv;
  
    do name=`echo $i | cut -d'.' -f1`;
  
    echo $name;
  
    ffmpeg -n -i "$i" "${name}.mp4"; rm -v "${name}.mkv";
  
  done
  
  
  
  for i in MovieCategories/Category2/*/*.mkv;
  
    do name=`echo $i | cut -d'.' -f1`;
  
    echo $name;
  
    ffmpeg -n -i "$i" "${name}.mp4"; rm -v "${name}.mkv";
  
  done
  
  for i in MovieCategories/Category3/*/*.mkv;
  
    do name=`echo $i | cut -d'.' -f1`;
  
    echo $name;
  
    ffmpeg -n -i "$i" "${name}.mp4"; rm -v "${name}.mkv";
  
  done
  
  for i in MovieCategories/Category4/*/*.mkv;
  
    do name=`echo $i | cut -d'.' -f1`;
  
    echo $name;
  
    ffmpeg -n -i "$i" "${name}.mp4"; rm -v "${name}.mkv";
  
  done
  
  
  
  for i in MovieCategories/Category5/*/*.mkv;
  
    do name=`echo $i | cut -d'.' -f1`;
  
    echo $name;
  
    ffmpeg -n -i "$i" "${name}.mp4"; rm -v "${name}.mkv";
  
  done
  
  for i in MovieCategories/Category6/*/*.mkv;
  
    do name=`echo $i | cut -d'.' -f1`;
  
    echo $name;
  
    ffmpeg -n -i "$i" "${name}.mp4"; rm -v "${name}.mkv";
  
  done
  
  for i in MovieCategories/Category7/*/*.mkv;
  
    do name=`echo $i | cut -d'.' -f1`;
  
    echo $name;
  
    ffmpeg -n -i "$i" "${name}.mp4"; rm -v "${name}.mkv";
  
  done
  
  
  
  for i in MovieCategories/Category8/*/*.mkv;
  
    do name=`echo $i | cut -d'.' -f1`;
  
    echo $name;
  
    ffmpeg -n -i "$i" "${name}.mp4"; rm -v "${name}.mkv";
  
  done
  
  for i in MovieCategories/Category9/*/*.mkv;
  
    do name=`echo $i | cut -d'.' -f1`;
  
    echo $name;
  
    ffmpeg -n -i "$i" "${name}.mp4"; rm -v "${name}.mkv";
  
  done
  
  for i in MovieCategories/Category10/*/*.mkv;
  
    do name=`echo $i | cut -d'.' -f1`;
  
    echo $name;
  
    ffmpeg -n -i "$i" "${name}.mp4"; rm -v "${name}.mkv";
  
  done
  
  
  
  for i in MovieCategories/Category11/*/*.mkv;
  
    do name=`echo $i | cut -d'.' -f1`;
  
    echo $name;
  
    ffmpeg -n -i "$i" "${name}.mp4"; rm -v "${name}.mkv";
  
  done

  I attempted to consolidate them into one command to help a bit but for some reason it mismatched the names from different directories and failed. Overall my main goal is to only run one movie at a time. If you could help consolidate this that would be a bonus. The movies are listed as follow :

  MovieCategories/

  • Category1/

    • Movie1/
      • Movie1.mp4
    • Movie2/
      • Movie2.mkv
    • Movie3/
      • Movie3.mp4
  • Category2/
    • Movie4/
      • Movie4.mp4
    • Movie5/
      • Movie5.mkv
    • Movie6/
      • Movie6.mp4

  And on...

• headless chrome capture screen video or animation

  22 mai 2017, par t_io

  I try to capture some animations from a website and stitch them together using ffmpeg.
  As far as I understand the docs startScreencast is the way to go.

  If I understand that right I can start the screencast with

  await Page.startScreencast({format: 'png', everyNthFrame: 1});

  and listen to every incoming frame with

  Page.screencastFrame(image =>{
  
    const {data, metadata} = image;
  
    console.log(metadata);
  
  });

  But it’s never prints out something. So I assume it’s not called.

  I archived my goal with something like this :

  let counter = 0;
  
  while(counter < 500){
  
    await Page.startScreencast({format: 'png', everyNthFrame: 1});
  
    const {data, metadata} = await Page.screencastFrame();
  
    console.log(metadata);
  
    counter += 1;
  
  }

  Which feels like a non-performant hack.
  So any suggestions on how to use startScreencast and screencastFrame properly ?