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• How to dump RTSP to raw data file without encoding

  28 juin 2020, par Yves

  I've read this link : How to dump raw RTSP stream to file ?

  


  In this link, it seems that dumping RTSP stream to some formatted file, such as mp4, is normal.

  


  But I want to store the RTSP stream into the raw data files, instead of files like mp4, avi etc. And I should be able to extract data from the raw data files and send it out as RTSP stream too.

  


  In a word, this is what I need :

  


  

  1. receiving RTSP stream ---> 2. store RTSP data into raw data files ---> 3. read raw data files and send data as RTSP stream

  


  


  Why do I need this ?

  


  Because as my understanding, storing RTSP strema into some formatted file, such as mp4, needs to do an action of encoding (encode RTSP to mp4). But for me, I don't need this action, I simply need to store RTSP data and re-send it as RTSP stream. So if I can store RTSP into the raw-data file, instead of mp4, I don't need to spend computer resources on the action of encoding.

  


• Fill a BGR Frame Data in FFMPEG

  23 février 2016, par mFeinstein

  I am following the FFmpeg video enconding example here, but it makes some dummy YUV420P frames and I have a BGR image already captured from a camera.

  I am not sure how to use frame->data[] and frame->linesize[] for filling them with my BGR image instead, so I can encode an H264 video.

  ---

  EDIT :

  I have the following code (it’s called for every new picture the camera sends) after Ronald’s answer :

      .............
  
      AVFrame *bgrFrame = av_frame_alloc();
  
  
  
      bgrFrame->width = originalBGRImage.cols;
  
      bgrFrame->height = originalBGRImage.rows;
  
  
  
      ret = av_image_alloc(bgrFrame->data, bgrFrame->linesize, bgrFrame->width, bgrFrame->height, AV_PIX_FMT_BGR24, 32);
  
  
  
      /////////////////////////////////////
  
      // This works and prevents memory leak....if I remove it, it consumes all the RAM....but I can't free this memory here, since I will use it later...
  
      av_freep(&bgrFrame->data[0]);
  
      av_frame_free(&bgrFrame);
  
      return;
  
      /////////////////////////////////////
  
  
  
      ret = av_image_fill_pointers(bgrFrame->data, AV_PIX_FMT_BGR24, bgrFrame->height, originalBGRImage.data, bgrFrame->linesize);
  
  
  
      /////////////////////////////////////
  
      // Here is where I am done using the memory so I will want to free it...but this same code crashes the program.
  
      av_freep(&bgrFrame->data[0]);
  
      av_frame_free(&bgrFrame);
  
      return;
  
      /////////////////////////////////////

  So if I remove the av_freep(&bgrFrame->data[0]); at the end of the code I will have a memory leak...but leaving it there crashes....so what’s the correct way to free the used memory ?

• How to packet encoded AAC data to flv file with ffmpeg API ?

  1er juillet 2015, par Jerikc XIONG

  I have captured the Audio data from Android Microphone and encoded them by MediaCodec.

  My question is :

  How to packet encoded AAC data to flv with ffmpeg ?