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• apply ffmpeg to many files

  30 juillet 2015, par puchu

  I have written simple script :

  #!/bin/bash
  
  find . -name "*.m4a" | while read filename;
  
  do
  
      new_filename=$(echo "$filename" | sed "s/^\(.*\)m4a$/\1flac/g");
  
      if [ ! -f "$new_filename" ]
  
      then
  
              #ffmpeg -i "$filename" -acodec flac "$new_filename" > /dev/null 2>&1;
  
              #wait $!;
  
              echo "$filename";
  
              echo "$new_filename";
  
      fi
  
  done

  it outputs correct result :

  ./Equilibrium, ALAC [GER] viking.folk/2003 - Demo 2003, ALAC/04 - Met.m4a
  
  ./Equilibrium, ALAC [GER] viking.folk/2003 - Demo 2003, ALAC/04 - Met.flac
  
  ./Equilibrium, ALAC [GER] viking.folk/2003 - Demo 2003, ALAC/02 - Nach Dem Winter.m4a
  
  ./Equilibrium, ALAC [GER] viking.folk/2003 - Demo 2003, ALAC/02 - Nach Dem Winter.flac

  if uncomment ffmpeg and wait :

  ./Equilibrium, ALAC [GER] viking.folk/2003 - Demo 2003, ALAC/04 - Met.m4a
  
  ./Equilibrium, ALAC [GER] viking.folk/2003 - Demo 2003, ALAC/04 - Met.flac
  
  uilibrium, ALAC [GER] viking.folk/2003 - Demo 2003, ALAC/02 - Nach Dem Winter.m4a
  
  uilibrium, ALAC [GER] viking.folk/2003 - Demo 2003, ALAC/02 - Nach Dem Winter.flac

  And no flacs has been done !

  PS

  #!/bin/bash
  
  find . -name "*.m4a" | while read filename;
  
  do
  
      new_filename=$(echo "$filename" | sed "s/^\(.*\)m4a$/\1flac/g");
  
      if [ ! -f "$new_filename" ]
  
      then
  
              ffmpeg -i "$filename" -acodec flac "$new_filename";
  
              echo "$filename";
  
              echo "$new_filename";
  
      fi
  
      sleep 5;
  
  done

  1) encode start but suddenly stop with no error messages

  2) encode couldn’t start because of "uilibrium" instead of "./Equilibrium"

  3) = 1)

  4) = 2)

  ...

  last) correctly

• Advise newsportal [on hold]

  25 janvier 2016, par DavyJ

  I need some advise for building an news system/site where news photographers can upload photo’s and video in every format from all kind off devices like mobiles, and camera’s from different Brands to keep the system easy for everyone ! Its need to be something with PHP ,js on a wamp. Is ffmpeg enough for this to acomplish ? And if yes, can i use one form fileinput for video and photos ?. Photos needs to be converted to .jpeg and video to .mp4. Maybe someone knows/has a simple PHP form with this functionality. Any help and ideas to accomplish is welcome. Is a lot i want in one solution, but i need some input and advice about what is the best direction for this kind of system.

  Thanks in advance !,
  Dave

• How to extract the sound of a video from two timecodes to a .ts file [closed]

  22 avril 2023, par Imprevisible

  I'm trying to use FFMPEG to extract the audio from a video for a certain period of time and cut it into 5 second chunks, but it doesn't work. Instead, the chunks have different lengths and don't match what I asked for. I tried several solutions, but nothing worked.

  


  From what I understand, the problem could be with the picturerate and the treshold, but I don't know what to do with that information. Here is the command I used :

  


  ffmpeg -loglevel error -accurate_seek -ss 00:00:00 -to 00:00:05 -t 5 -i H:/Films/Tetris.mkv -c:a aac -b:a 128k -ac 4 -vn -map 0:1 -f adts pipe:1


  


  This gave me an audio file of 53s, but if I do from 00:00:05 to 00:00:10, I have an audio file of 4.6s.

  


  If anyone can help me, that would be great. Thanks in advance