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• FFMpeg Commands definition in library source code

  25 janvier 2013, par SKC

  I tried running the ffmpeg commands from Android activity using an emulator in Windows OS, but i get errors.
  I tried keeping both my resource files in /mnt/sdcard as well the application package within /data/data, but none of the options worked out for running the ffmpeg commands.

  These are the following approach i had taken while running the command through an android activity.
  (Command to convert a series if images into a video)
  Approach 1 :

      String[] cmd =new String[4];
  
      cmd[0]="/data/data/com.example.commandlineffmpeg/files/ffmpeg";
  
      cmd[1]="-i";
  
      cmd[2]="/data/data/com.example.commandlineffmpeg/images/bpc_%03d.png";
  
      cmd[3]="/data/data/com.example.commandlineffmpeg/out/out.avi";
  
  
  
      Process p = Runtime.getRuntime().exec(cmd, null, new File("/data/data/com.example.ffmpegnew/out"));

  I have solved this, basically there was system permission issues and hence we were not allowed to access the system properties required to run the FFMpeg commands.
  Thus we need to sign the apps with the system certificates and hence we can use FFMpeg commands directly from any android activity.

• FFmpeg error code 254

  17 septembre 2013, par Akerus

  I try to get file informations via ffprobe in a java-application.

  I am using the following command :

  /usr/bin/ffprobe -v quiet -print_format json -show_format -show_streams TESTVIDEOPATH

  Running that command in bash, it works like a charm : It returns the JSON-String and error code is "0".
  Running that command in Java results in error code "254" and result is :

  \n\n

  When I modify the command, so that ffprobe accepts a stream as input :

  /usr/bin/ffprobe -v quiet -i - -print_format json -show_format -show_streams

  it works in both bash and Java.

  In Java the following is used :

  ProcessBuilder processBuilder = new ProcessBuilder(command.split(" "));
  
  this.process = processBuilder.start();
  
  this.process.waitFor();
  
  int exitCode = this.process.exitValue();
  
  this.outputOfProcess = this.process.getInputStream();

  Can anyone tell me what the error code 254 means ? I couldn't find anything about it.

  Edit : ffmpeg version 0.10.7-6:0.10.7-0jon1 quantal is used

• ffmpeg code not working aws lambda environment

  5 janvier 2021, par Akash Das

  I followed this article and deployed the Lambda functions and layers and set it up all fine.

  


  But I am facing a problem when I try converting the mp4 video into a 720p video, the ffmpeg commands that work in my Ubuntu 20.04 are not working in the Lambda and gives me error in the form of 0kb files in the destination folder.

  


  Can someone explain why this is happening ? The command that I used was :

  


  ffmpeg -i input.mp4 -s 1280x720 -c:a copy output.mp4


  


  I use this command in the Python file

  


  ffmpeg_cmd = "/opt/bin/ffmpeg -i \"" + s3_source_signed_url + "\" -f mp4 -s 1280x720 -c:a copy -" ___ . 


  


  This is the error I get :

  


  

  


  The problem is that I used a code like this to get only the audio

  


  ffmpeg_cmd = "/opt/bin/ffmpeg -i \"" + s3_source_signed_url + "\" -f mp3 -ab 192000 -vn  -" ___ . 


  


  And it works as expected.