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• Possible Duplicate : Batch convert all files in folder and sub folder using FFMpeg with different output folder

  8 janvier 2020, par Cecila Tarjon

  I know that the part of this is a duplicate to How would I write a batch file to run an ffmpeg command on an entire directory ? and How do you convert an entire directory with ffmpeg ?.

  I am currently using the command prompt to navigate to the directory in question and then running the command line

  for %i in (*.mkv) do c:\ffmpeg\bin\ffmpeg -i "%i" -c copy -map 0 %userprofile%\documents\Plex\mp4\%~ni.mp4"

  I would like to be able to run this on a higher level (ie %userprofiles%\Plex\MKV instead of ...\mkv\show\season) and have it run on all sub folders. I would also ideally like for it to output to the mp4\show\season level for the same place it get them from.

  Any advice ?

  Note : this is for remuxing to MP4 so I can use it on my Roku as well as from my Plex. Once I know it will work in a regular command window I will be converting it to a batch file so i can run as needed.

• PHP exec is causing issues in my webservice

  11 novembre 2013, par meda

  Guys I need some help with this

  I am building an android app that uploads a sound file to a server then converts it.
  Then the next step in my app is to populate a spinner using JSON from another script

  Everything works as expected but for some reason I get an JSON parsing error on the next step.
  I made sure the JSON is correct, so the problem is not there.
  You can trust me on that, I debugged this.

  The android error is :

  E/JSON Parser(14625) : Error parsing data org.json.JSONException : Value
   !DOCTYPE of type java.lang.String cannot be converted to JSONObject

  It the JSON script is not even called, because I put some logs to make sure

  It seems like the issue is comming from the webservice instead, particularly the following function

  function ConvertFileToUlaw($input, $output) { 
  
      try {
  
          exec("ffmpeg -i \"$input\" -codec:a pcm_mulaw -f mulaw \"$output\"");
  
         //error_log($output);
  
      } 
  
      catch (Exception $e) {
  
          error_log($e->getMessage());
  
      }
  
  } 

  I call it like this :

  ConvertFileToUlaw($ThreeGpFilePath, $ulawFilePath);

  Now this works fine, and my sound file is converted, but I can get the next script to run without error, unless I comment it out.

  I am stumped at this point, please advice.

• Best practices for developing scalable video transcoding server on Amazon Web Services ?

  6 septembre 2016, par undefined

  What do people think are the most important issues when developing an application that is going to allow users to upload video and images to a server and have them transcoded by FFMPEG and stored in amazon S3 ? I have a couple of options ;

  1) install FFMPEG on the same server that handles file uploads, when a video is uploaded and stored on EC2 instance, call FFMPEG to convert it then when done, write the file to S3 bucket and dispose of the original.

  How scalable is this ? What happens when many users upload at the same time ? How do I manage multiple processes at once ? How do I know when to start another instance and load balance this configuration ?

  2) Have one server for processing uploads (updating database, renaming files etc) and one server for doing transcoding. Again what is the best way to manage multiple processes ? should I be looking at Amazon SQS for this ? Can I tell the transcoding server to get the file from the upload server or should I copy the file to the transcoding server ? Should I just store all files on S3 and SQS can read from there. I am trying to have as little traffic as possible.

  I am running a linux box as the upload server and have FFMPEG running on this.

  Any advice on best practices for setting up such a configuration would be appreciated. Many thanks