Recherche avancée

Sur d’autres sites (15700)

• Play same audio file to two different sound cards simultaneously using android media player [on hold]

  15 décembre 2016, par Hardik

  I have one custom board( media player) running android4.2 OS on it and I need to add a feature that will play same audio to two different sound cards simultaneously.

  I have two output devices HDMI and TLV320aic3100 Codec.
  And Want to play Video and audio through HDMI and same audio should play through TLV codec. Audio through TLV codec should be in sync with HDMI video/audio.

  Right now I’m able to play audio through TLV codec by hard-coding sound card number in tinyalsa PCM code "pcm.c" which is used by HAL code of Android Media Player (by default this code will give audio to HDMI),
  but not able to provide audio to both sound cards simultaneously.

  I tried with creating thread in pcm code and writing incoming audio data to both sound card, By doing this HDMI going into under-run problem.

  Is there any way to provide same audio to both sound cards simultaneously using Android Media Player or any other options to try ?

• Revision d8f5d1b257 : Problem of over smoothing with intra modes. In some cases intra modes in inter

  14 décembre 2012, par Paul Wilkins

  Changed Paths : Modify /vp9/encoder/vp9_firstpass.c Modify /vp9/encoder/vp9_rdopt.c Problem of over smoothing with intra modes. In some cases intra modes in inter frames give an over smoothed appearance. Especially with noisy but flat content. Also in some cases there were problems with key frame (...)

• Executing bash shell command and extract output —> invalid file error

  29 novembre 2016, par Ingeborg

  I want to extract the framesize of a video from a file. For this purpose, I have launched an ffmpeg command via bash shell, and I want to extract the output. This command is working well in the bash shell, and returns the output as wanted.

  ffprobe -v error -count_frames -of flat=s=_ -select_streams v:0 -show_entries stream=nb_read_frames /home/peter/DA/videos/IMG-2014-1-10-10-4-37.avi

  I want to call it via C++ and read out the result. I use the IDE Qt 4.8.6 with GCC 4.8 compiler.

  For my code, I use this template :

  executing shell command with popen

  and changed it for my demands to

  #include <iostream>
  
  #include <string>
  
  #include 
  
  
  
  using namespace std;
  
  
  
  
  
  int main()
  
  {
  
     FILE* pipe = popen("echo $(ffprobe -v error -count_frames -of flat=s=_ -select_streams v:0 -show_entries stream=nb_read_frames /home/peter/DA/videos/IMG-2014-1-10-10-4-37.avi)", "r");
  
   if(!pipe)
  
   {
  
       cout &lt;&lt; "error" &lt;&lt; endl;
  
       return 1;
  
   }
  
   char* buffer = new char[512];
  
  
  
  string result;
  
  fgets(buffer, sizeof(buffer), pipe) ;
  
  while(!feof(pipe))
  
  {
  
      if(fgets(buffer, sizeof(buffer), pipe) != NULL)
  
      {
  
          cout &lt;&lt; buffer &lt;&lt; endl;
  
          result += buffer;
  
      }
  
  }
  
  pclose(pipe);
  
  cout &lt;&lt; result&lt;&lt; endl;
  
  return 0;   
  
  }
  
  </string></iostream>

  The Qt console returned me this warning, and it is rending with return 0 :

  /home/peter/DA/videos/IMG-2014-1-10-10-4-37.avi: Invalid data found when processing input

  and "pipe" is empty.

  When I compile the main.cpp file above with g++ in the shell it works nice too.