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• Using Intel QSV in WSL2

  26 janvier 2023, par heebin

  I want to use Intel QSV in WSL2.

  


  Based on the experience of using QSV on a native Ubuntu PC, I installed the same library, but it doesn't work.

  


  ex) ffmpeg, libva, vainfo, intel Media SDK, gmmlib, media-driver ...

  


  My CPU supports QSV, but I can't initialize it.

  


  In vainfo it works like this :

  


  $ ls /dev/dri
card0 renderD128

$ sudo vainfo
Trying display: wayland
error: XDG_RUNTIME_DIR not set in the environment.
Trying display: x11
libva info: VA-API version 1.16.0
libva info: User environment variable requested driver 'iHD'
libva info: Trying to open /usr/lib/x86_64-linux-gnu/dri/iHD_drv_video.so
libva info: Found init function __vaDriverInit_1_14
DRM_IOCTL_I915_GEM_APERTURE failed: Invalid argument
Assuming 131072kB available aperture size.
May lead to reduced performance or incorrect rendering.
get chip id failed: -1 [22]
param: 4, val: 0
libva error: /usr/lib/x86_64-linux-gnu/dri/iHD_drv_video.so init failed
libva info: va_openDriver() returns 18
vaInitialize failed with error code 18 (invalid parameter),exit


  


  I want WSL to be initialized properly so I can use it in C.

  


• How to speed-up ffmpeg encoding for the 'qtrle' codec

  20 mai 2024, par userxxxxxxxxx

  Need you guys help for
that I'm facing kinda limit of performance to encode clips with the codec 'qtrle'.

  


  In short,

  


  

  1. Is there GPU option or technic for the qtrle encoding by GPU ?
Can I get ANY of technic for qtrle ?

  


  2. Does NVMe m.2 upgrade helps performance for ffmpeg concat and encoding ? (Currently SKHynix P41 M.2 1TB on PCIe 4 board)

  


  


  (Several multiple times of re-encoding betewwen clips again again again in one loop, so that I cannot use h254 stuff.)

  


• Playing audio file using libavcodec and libao

  21 août 2013, par sarah john

  Myself trying to play an audio file using libavcodec in qt5 .While trying to play i am unable to play the the file.
  while decoding the file using av_read_frame()
  audioStream->index=0
  and packet.stream_index is some higher nos .so avcodec_decode_audio4() is not getting executed.Why is it so ?
  I am getting output as
  My output

  ---

  File Opend

  Input #0, ogg, from '/home/tel/Downloads/desktop-login.ogg':
  
  Duration: 00:00:07.72, start: 0.000000, bitrate: 108 kb/s
  
  Stream #0:0: Audio: vorbis, 44100 Hz, stereo, fltp, 112 kb/s
  
  audioStream 0x88b3f20
  
  Stream id: 0
  
  Codec ptr: 0x88b4100
  
  Codec Opened
  
  DRIVER ID 1
  
  Sample format 3
  
  Sample format:AV_SAMPLE_FMT_FLT 32
  
  Sample format channels 0
  
  Sample format rate 0
  
  Sample format  4
  
  buffersize  192008

  This is my program. My output is also given below.Please help me in solving this.

  for(i=0; i < container->nb_streams; i++){
  
  
  
      if(container->streams[i]->codec->codec_type==AVMEDIA_TYPE_AUDIO){
  
           stream_id=i;
  
           audioStream=container->streams[i];
  
  
  
           qWarning() <<"audioStream"<streams[stream_id]->codec;
  
  qWarning() <<"Codec ptr:"<< ctx;
  
  AVCodec *codec=avcodec_find_decoder(ctx->codec_id);
  
  if(codec==NULL){
  
          die("cannot find codec!");
  
  }
  
  
  
  if(avcodec_open2(ctx,codec,NULL)<0){
  
          die("Codec cannot be opended!");
  
  }
  
  else
  
          qWarning()<<"Codec Opened";
  
  
  
  
  
          ao_initialize();
  
          driver = ao_default_driver_id();
  
          qWarning()<<"DRIVER ID" <sample_fmt;
  
          qWarning()<<"Sample format"<channels;
  
     qWarning()<<"Sample format channels"<sample_rate;
  
    qWarning()<<"Sample format rate"<codec;
  
    while(av_read_frame(container,&packet)>=0)
  
    {
  
  
  
          if(packet.stream_index==audioStream->index){
  
          len=avcodec_decode_audio4(ctx,frame,&frameFinished,&packet);
  
          qWarning()<<"Enterd if loop";
  
  
  
          if(frameFinished){
  
              qWarning()<<"PLAYING";
  
              ao_play(audio_device, (char*)frame->extended_data[0],frame->linesize[0] );
  
          }
  
    }