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• How to modify this Windows script to do a match?

  21 January 2016, by Andrei Clear

  ffmpeg can resize a video/image file .. first is input_file .. parameters .. output_file ..

  ffmpeg -i input.avi -vf scale=320:240 output.avi

  or

  ffmpeg -i 20140724_071746.mp4 -vf scale=640:-1 20140724_071746_LOW_640.mp4

  more info here: https://trac.ffmpeg.org/wiki/Scaling%20%28resizing%29%20with%20ffmpeg

  I want it to downscale all the videos on my microSD card to create space (I have originals backed-up)

  So I want it to go throw all the files in all the sub-directories overnight and resize all the files. Chances are that the script might stop or crash and I would need to run it again, or if I add new files I would want to run it again.

  So I would want it to skip processing all the files that have been processed AND their resized versions.

  In my case if a FILE_NAME.mp4 also has FILE_NAME_LOW_640.mp4 SKIP it
  AND
  if a FILE_NAME_LOW_640.mp4 has *640 SKIP it

  Here is my Windows batch script so far

  REM @echo off
  
  REM just save as "DOS"
  
  REM cd /d C:\s
  
  
  
  setlocal enabledelayedexpansion
  
  for %%j in (*.mp4) do (
  
  set filename=%%~nj
  
  echo %%j
  
  
  
  ffmpeg -i %%j -vf scale=640:-1 %%j_LOW_640.mp4
  
  
  
  REM but now I want to add the two checks to skip files that have been resized .. or if they are the resized version 
  
  
  
  REM if not "!filename!"=="%%j_LOW_640.mp4" AND IF FILE !COINTAIN *640* THEN ffmpeg -i %%j -vf scale=640:-1 %%j_LOW_640.mp4
  
  
  
  )
  
  
  
  pause
  
  REM AND I would also want it to process all the sub-directories  

  In other words my questions for help are:

  1. How can I do a check for a string if it contains a string match?

  2. How can I have my script also process all the subdirectories?

• Skipping incompatible libmp3lame.a while searching mp3lame (FFMPEG)

  19 October 2014, by trololo

  I want to compile ffmpeg with libmp3lame for my Android app. I’m using Virtual Machine with OS Debian.
  While compiling I recieve with message in Console.log file:

  skipping incompatible /home/sla/ffmpeg_build/lib/libmp3lame.a while searching mp3lame
  ...

  That’s why compilations doesn’t work properly.

  I’ve installed lame for debian using this code install.sh:
  (https://trac.ffmpeg.org/wiki/CompilationGuide/Ubuntu)

  sudo apt-get install libmp3lame-dev
  
  mkdir /home/sla/ffmpeg_build
  
  mkdir /home/sla/ffmpeg_sources
  
  sudo apt-get install nasm
  
  cd /home/sla/ffmpeg_sources
  
  wget http://downloads.sourceforge.net/project/lame/lame/3.99/lame-3.99.5.tar.gz
  
  tar xzvf lame-3.99.5.tar.gz
  
  cd lame-3.99.5
  
  ./configure --prefix="/home/sla/ffmpeg_build" --enable-nasm --disable-shared
  
  make
  
  make install
  
  make distclean

  But it doesn’t work (lame compiles but ffmpeg - doesn’t).
  ffmpeg compiler says something strange.

  For ffmpeg I wrote flags:

  --export-cflags
  
  -I/home/sla/ffmpeg_build/include
  
  
  
  --export-ldflags
  
  -L/home/sla/ffmpeg_build/lib

  How to fix it?

• Anomalie #3688 (Nouveau): Différence de traitement du IN selon qu’un critère est facultatif ou pas

  9 February 2016, by tcharlss (*´_ゝ｀)

  Description :¶

  Il semble y avoir une différence de traitement selon qu’un critère est facultatif ou pas, quand dans l’environnement, la valeur correspondant au critère est un array. Dans un cas, ça fait bien un WHERE machin IN (x,y,z), dans l’autre, ça fait un WHERE machin = truc bizarre.

  Pour reproduire :¶

  Soit un squelette qui en inclus un autre :
  

  Squelette inclus :
  

  #ID_AUTEUR
  

  Au niveau de ce dernier, #ENV{id_auteur} est un tableau qui contient des strings, au lieu de int :
  

  array (size=10)
    0 => string ’1’ (length=1)
    1 => string ’2’ (length=1)
    etc.
  

  Avec le critere facultatif {id_auteur ?}, la boucle passe, on a bien un IN dans le WHERE :
  

  auteurs.id_auteur  IN (1,2,3,4,5,6,7,8,9,10)
  

  En revanche avec le critere id_auteur, ça ne fonctionne pas :
  

  auteurs.id_auteur = (2 1 (3) : 4)