Sur d’autres sites (8067)

• How to run one script after another in Apple Script

  19 juillet 2015, par mskx4

  I’m trying with Apple Script to run three different scripts that would alow me to :

  1. Convert a purchased m4a file into an "anonymized" m4a file and extract its artwork (with ffmpeg)
  2. Attach the artwork to the file previously converted, since the converted file won’t maintain its artwork (with AtomicParsley)
  3. Remove the artwork from his path

  I don’t have any kind of programming knowledge, I’ve collected different script from the web and tried to make an app that could do these 3 simple task :

  on open argv
  
     set paths to ""
  
     repeat with f in argv
  
         set paths to paths & quoted form of POSIX path of f & " "
  
     end repeat
  
     tell application "Terminal"
  
          do script "for f in " & paths & "; do ffmpeg -i \"$f\" -acodec copy -y \"$f\" output.jpg; done"
  
          activate
  
          do script "for f in " & paths & "; do AtomicParsley \"$f\" --artwork output.jpg; done"
  
          activate
  
          do script "rm output. jpg"
  
          activate
  
     end tell
  
   end open

  The problem is that, when I drop a file on the app, it opens three terminal windows at once and it runs the three tasks in the same time, with the obvious result that the conversion fails : the first task overwrites the input file, and the second script should use the output of the first one as its input file. So I need the three scripts to be executed successively, one after another.

• Why is exec('which ffmpeg') returning nothing in my application ?

  28 avril 2015, par EchoLogic

  I’m trying to deal with FFMpeg for my application, but I’m encountering some difficulty in getting it set up. To instantiate or create an instance of FFMpeg, I need to call a create() method and pass through the operating locations of FFMpeg and FFProbe. To do this, I was hoping to be able to write :

          $ffmpeg = FFMpeg\FFMpeg::create([
  
                  'ffmpeg.binaries' => exec('which ffmpeg'),
  
                  'ffprobe.binaries' => exec('which ffprobe')
  
          ]);

  But, sadly, the command exec('which ffmpeg') returns an empty string. If I run the ’which ffmpeg’ command in Terminal, I get a response :

  /usr/local/bin/ffmpeg

  So why does it work in my terminal, but not when my PHP script tries to execute it ?

  I’ve tried a few solutions, such as appending 2>&1 to the end of the command, which did not help, running the command in shell_exec(), and placing the output in the second parameter of exec() which also did not solve my issue.

  I feel like this may be some sort of weird permissions issue...

  Addendum

  It has been brought to my attention that PHP cannot see my $PATH variable. From the console, echo $PATH produces :

  /Applications/MAMP/bin/php/php5.6.2/bin:/usr/local/bin:/usr/bin:/bin:/usr/sbin:‌​/sbin:/opt/X11/bin:/usr/local/git/bin:/opt/ImageMagick/bin

  While calling the same from my application with exec() produces :

  /usr/bin:/bin:/usr/sbin:/sbin237.671000 

• How to extract single image (with different name each time) from multiple videos in the one folder using ffmpeg bash script

  15 juillet 2014, par morriscotty_sd

  Let’s start with this... I’m fairly new to Linux.

  I have been looking into ffmpeg to extract an image from a video using the terminal. I’ve accomplished this using this piece of code :

     ffmpeg  -itsoffset -4  -i oggvideo.ogg -vcodec mjpeg -vframes 1 -an -f rawvideo -s 320x240 oggThumb.jpg

  I run this when I’m in the directory which holds the videos in my project. But what I want is to extract an image from all videos in that folder at the same time, naming the image corresponding with the video name it’s extracted from. My end goal is to have a folder which will hold videos that a user uploads, and at a certain time the script will run and extract images from the uploaded videos, saving the image path to a database.

  I found this line of code :

  for %%i in (*.mp4) do ffmpeg -ss 20 -i %%i -t 1 -s 590x340 -f image2 %%i.jpg

  from this site : Trying-to-extract-1-image-from-multiple-videos-with-FFMPEG

  I run that in the terminal and it gives me the error : ’bash : syntax error near unexpected token `(’’
  I tried removing the ’( )’ but then it just takes me onto a new line. This is where I’m having the most problems due to being relatively new to linux commands.

  Any suggestions or advice would be very helpful.