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• Is using QtFFmpegWrapper+QLabel+QTimer a good way to play video in a Qt application ?

  21 décembre 2012, par Vi.

  I'm looking how to portably play video on Qt, but not Phonon.

  Using ffmpeg seems to be a good idea (it should work the same way on all platforms).

  Currently It uses QLabel for video output and does QPixmap::fromImage for each frame ; frames which are decoded and buffered by QtFFmpegWrapper in a background thread. QTimer decides when to show the next frame.

  The whole thing looks a bit hacky (Video ? In a label ?). Am I doing it right ? Is there a better portable way of playing ffmpeg-decoded video in a Qt application ?

• Adding Documentation of a library to manual pages

  30 décembre 2012, par Appy

  I am working with Ubuntu 12.04.1 . I am learning to make a basic video player using FFmpeg library in C . My manual pages don't show any entries for the headers/functions of the library . Can someone please show me a way to add the documentation to my manual pages .
  It is much easy to search that way than searching on a web page everytime .

  PS : I have tried to add documentation to man pages using Synaptic package manager . I installed a ffmpeg-doc package . But it doesn't seem to work .

  Thanks .

• executing ffmpeg command with getRuntime().exec() command

  12 mai 2015, par Iori

  i want to run ffmepg command directly on android.
  a simple command

  ffmpeg -i vid.mp4 out.mp4

  now the issue is that i have searched the internet and found the best android ffmpeg can be found here

  http://bambuser.com/opensource

  I have downloaded it and read the readme file and compiled it. the folder is ffmpeg. I have kept it in <--projectfolder-->/ffmpeg/

  there is a ffmpeg executeable file in ffmpeg folder called ffmpeg folder

  i have copied it in files folder and run this command

    try {    
  
  
  
      Toast.makeText(this, "Working", Toast.LENGTH_SHORT).show();
  
  
  
      Process p = Runtime.getRuntime().exec("/data/data/com.koder.testffmpeg/files/ffmpeg -i /sdcard/vid.mp4 /sdcard/out.mp4");
  
  
  
  
  
      } catch (IOException e) {
  
  
  
      txt.setText(e.toString());
  
  
  
      Toast.makeText(this, e.toString(), Toast.LENGTH_LONG).show();
  
  
  
      e.printStackTrace();
  
  
  
      }

  according to this link
  How do I reduce the video size captured by the default camera using FFMPEG in Android ?

  but still it does not work always exception i dont know what is going wrong
  can someone plz help me with this

  java.io.IOException: Error running exec(). Command:[/data/data/com.koder.testffmpeg/files/ffmpeg -i /sdcard/vid.mp4 /sdcard/out.mp4] Working Directory: null Environment:null