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• ffmpeg in bash only works on every second file

  5 août 2016, par kay

  ---

  EDIT :

  The Solution is to change the original ffmpeg-call below to the following :
  ffmpeg -nostdin -loglevel 16 -i "$dir/$var" -map_channel 0.0.0 "$left" -map_channel 0.0.1 "$right"
  where the -nostdin is the crucial thing.
  For reference see apply ffmpeg to many files (comment by macmichael01)

  ---

  I’m trying to convert all .wav-files in a given directory and it’s subdirectorys into two mono-files each with the following bash script. The crucial part is almost at the bottom - the ffmpeg call :

  #!/bin/bash
  
  # "[One] Stereo [file] to two mono [files] - stereo22mono"
  
  
  
  # Syntax ffmpeg siehe: https://trac.ffmpeg.org/wiki/AudioChannelManipulation
  
  
  
  
  
  ls -R $1 > .s22mtmp.txt
  
  
  
  while read -r line || [[ -n "$line" ]]; do
  
  
  
      var=$line
  
      tst=$var
  
      tst="${tst%:}"
  
  
  
      if [ -d "${tst%./}" ]       # is directory name
  
      then
  
          dir=$tst
  
  
  
      elif [ -f "$dir/$var" ]     # is file name
  
      then
  
          left=$dir/left_$var
  
          right=$dir/right_$var
  
  
  
          #loglevel 16 = only errors
  
          # -i ...-> input file
  
          # ffmpeg ... [SOURCE] ... [TARGET1] ... [TARGET2]
  
          ffmpeg -loglevel 16 -i "$dir/$var" -map_channel 0.0.0 "$left" -map_channel 0.0.1 "$right"
  
      fi
  
  
  
  done < .s22mtmp.txt
  
  
  
  
  
  rm .s22mtmp.txt

  It almost works - besides the fact, that it only does it’s job on only every second file, although the for-loop correctly goes through all files (watched it with echo) and calls ffmpeg.
  I thought it might be that ffmpeg has not finished it’s assigned work by the time it is asked to work on the next file and therefore just refuses, which seems to be true.
  Because I made one try with disowning every call of ffmpeg like so :

  ffmpeg -loglevel 16 -i "$dir/$var" -map_channel 0.0.0 "$left" -map_channel 0.0.1 "$right" & disown

  This worked almost, the problem was just that kind of hundreds of processes and multiple times more threads where starting to run and wouldn’t complete in a reasonable time, so I arborted. :D
  But at least it didn’t skip every second file anymore with that kind of call.

  Can anyone give me a hint, how to get this done ? Would be very thankful.. it’s actually the first time I’m trying with bash scripts.
  Thanks in advance !

• Android Video color effect issue using FFMPEG [on hold]

  8 juin 2016, par umesh mishra

  I m facing one problem. when we use library for effect that i have mentioned below video is created only 1/3 of actual video size. please tell me what is issue. and also doesn’t work on marshmallow.
  https://github.com/krazykira/VidEffects/wiki/Permanent-video-effects

• Anomalie #4532 (Nouveau) : Parse error en php 8

  26 juillet 2020, par Franck D

  Hello

  Spip et plugin_dist à jour de ce jour !
  easyphp (windows 10 (1909))
  easyphp
  Apache 2.4.43 x64
  PHP 8.0.0 alpha3 x64
  MySQL 8.0.20 x64

  Avant même de pouvoir faire l’installation, quand je vais sur le site, j’ai :
  Parse error : syntax error, unexpected token "match", expecting "(" in C :\Program Files (x86)\EasyPHP-Devserver-17\eds-www\test13\ecrire\inc\filtres.php on line 3114

  Je pense que le changement vient de :
  https://wiki.php.net/rfc/match_expression_v2