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• Android : Playing MP3 files with AudioTrack using ffmpeg

  16 juillet 2012, par Vipul Purohit

  I have integrated ffmpeg lib in my project and I can also get the information of media files. But now i have to play mp3 files using AudioTrack class in android using ffmpeg lib.

  For this I have to pass byte buffer to AudioTrack but I dont know how to get byte buffer from ffmpeg and use it with AudioTrack. I also want to play file instantly without delay.

  Here is my audio track code in java :

  AudioTrack track;
  
  bufferSize = AudioTrack.getMinBufferSize(44100,AudioFormat.CHANNEL_CONFIGURATION_MONO, AudioFormat.ENCODING_PCM_16BIT)
  
  track = new AudioTrack(AudioManager.STREAM_MUSIC, 44100, AudioFormat.CHANNEL_CONFIGURATION_MONO, AudioFormat.ENCODING_PCM_16BIT, bufferSize, mode);
  
  
  
  //Play audio clip
  
  track.play();
  
  
  
  while(stream_is_over){
  
  //Copy the decoded raw buffer from native code to "buffer" .....
  
  ............
  
  track.write(buffer, 0, readBytes);
  
  }

  Can anyone please give me the working code to play mp3 files with audio track. I have searched a lot but haven't find any correct answer.

• Android : How to record the mobile screen without using USB cable ?

  21 juin 2012, par Rajesh

  I want to build an application which would record my screen activities and would store them in a video file.

  1) I need to take the screenshots of my screen movements at periodic intervals and store them on the SD card.

  2) How can I create the video from the images which are already available on my SD card. I have tried with the FFMPEG. But I have encountered a few problems I don't know how to solve. The truth is I don't know the program to convert them.

  3 ) Is it possible to show the picture in my camera ?? That means if a user opens the camera from my app, it should show the pictures which are available on the SD card. If so, please advice me.

  EDIT : I have made a sample which can capable of taking 7 screen shots per second.

  Thanks,
  Rajesh .

• Android how to record my mobile screen in android with out using USB cable ?

  21 juin 2012, par Rajesh

  I am wondering to do the android application which should record my screen activities and should store as the video file .

  1) i need to take the screen shots of my screen movements with the periodic interval and should store in sdcard.

  2) how to create the video from the images which is already available in my sdcard. I have tried with the FFMPEG. but i have few problems dont know how to solve it .. the truth is dont know the program to convert it .

  3 ) is it possible to show the picture in my camera ?? That means if user opens the camera from my app some times i should show the pictures which available in my sdcard .. if its so please advice me .

  Thanks ,
  Rajesh .