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• What is the structure of AVPacket::data ?

  16 juin 2017, par Sanduni Wickramasinghe

  I’m extracting data of an MPEG data packet using data member variable which is inside AVPacket structure.

  AVDictionary *options = NULL;
  
  AVFormatContext *s = avformat_alloc_context();
  
  AVPacket *pkt = new AVPacket();

  Now I can read data as a bit stream. But I want to know the structure of data that I am reading. I mean, by separating it in to I,P and B frames.

  int ret = avformat_open_input(&s, url_ref, NULL, NULL);
  
  
  
  data = pkt->data;

• Error in playing encrypted data from url using ffmpeg

  3 février 2015, par Shijin Bose

  I want to play a video data from url. but the data is given as encrypted. so am first store the data to a buffer and then decrypt and then given to AVformat_open_input. but i found it is not possible to give buffer data toAVformat_open_input function. i can’t store the data to secondary device (dew to security).

  is it possible to play an encrypted data from url ?

• What is the best way to fill AVFrame.data

  21 septembre 2015, par Tim Hsu

  I want to transfer opengl framebuffer data to AVCodec as fast as possible.

  I’ve already converted RGB to YUV with shader and read it with glReadPixels

  I still need to fill AVFrame data manually. Is there any better way ?

  AVFrame *frame;
  
  // Y
  
  frame->data[0][y*frame->linesize[0]+x] = data[i*3];
  
  // U
  
  frame->data[1][y*frame->linesize[1]+x] = data[i*3+1];
  
  // V
  
  frame->data[2][y*frame->linesize[2]+x] = data[i*3+2];