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• acces to data stream (KLV) with windows media-foundation

  20 février 2023, par hacenesh

  Is there any way to acces data stream with Windows Media Foundation ?

  


  I have a video stream that contains tree streams : Audio, video and Data stream
When I opend the file with ffmpeg I can access the three stream :

  


  

  • AVMEDIA_TYPE_AUDIO

  


  • AVMEDIA_TYPE_VIDEO

  


  • AVMEDIA_TYPE_DATA

  


  


  This image show more details about the data stream I wanted to retrieve.


  


  With windows media-foundation I can only see audio and video streams.

  


  IMFMediaSource* pVideoSource = NULL;
IMFSourceReader* pVideoReader = NULL;           
....
....
while (pVideoReader->GetStreamSelection(stmIndex, &isSelected) == S_OK) {
      printf("Stream %d is selected %d.\n", stmIndex, isSelected);

      CHECK_HR(pVideoReader->GetCurrentMediaType(stmIndex, &pStmMediaType), "Failed to get media type for selected stream.");

      std::cout << "Media type: " << GetMediaTypeDescription(pStmMediaType) << std::endl;

      GUID majorMediaType;
      pStmMediaType->GetGUID(MF_MT_MAJOR_TYPE, &majorMediaType);
      if (majorMediaType == MFMediaType_Audio) {
          std::cout << "Source audio stream index is " << stmIndex << "." << std::endl;
      }
      else if (majorMediaType == MFMediaType_Video) {
          std::cout << "Video stream index is " << stmIndex << "." << std::endl;
      }
      stmIndex++;
      SAFE_RELEASE(pStmMediaType);
  }



  


  **Output **

  


  


  Stream 0 is selected 1.
Media type : MFMediaType_Audio : MF_MT_AUDIO_AVG_BYTES_PER_SECOND=16031, MF_MT_AUDIO_BLOCK_ALIGNMENT=1, 33026EE0-E387-4582-AE0A-34A2AD3BAA18=1, MF_MT_AUDIO_NUM_CHANNELS=2, MF_MT_MAJOR_TYPE=MFMediaType_Audio, MF_MT_AUDIO_SAMPLES_PER_SECOND=48000, MF_MT_AAC_AUDIO_PROFILE_LEVEL_INDICATION=254, MF_MT_AUDIO_PREFER_WAVEFORMATEX=1, MF_MT_USER_DATA=, MF_MT_FIXED_SIZE_SAMPLES=1, MF_MT_AAC_PAYLOAD_TYPE=1, MF_MT_ALL_SAMPLES_INDEPENDENT=1, MF_MT_SAMPLE_SIZE=1, MF_MT_SUBTYPE=MFAudioFormat_AAC,
Source audio stream index is 0.
Stream 1 is selected 1.
Media type : MFMediaType_Video : MF_MT_FRAME_SIZE=W:1920 H : 1080, MF_MT_MPEG_SEQUENCE_HEADER=, MF_MT_MAJOR_TYPE=MFMediaType_Video, MF_MT_AM_FORMAT_TYPE=E06D80E3-DB46-11CF-B4D1-00805F6CBBEA, MF_MT_MPEG2_LEVEL=41, MF_MT_MPEG2_PROFILE=66, MF_MT_FIXED_SIZE_SAMPLES=1, MF_MT_FRAME_RATE=25/1, MF_MT_PIXEL_ASPECT_RATIO=1:1, MF_MT_SAMPLE_SIZE=1, MF_MT_INTERLACE_MODE=2, MF_MT_SUBTYPE=3F40F4F0-5622-4FF8-B6D8-A17A584BEE5E,
Video stream index is 1.
Source media type count : 1, is first stream selected 1.
Default output media type for source reader :
MFMediaType_Video : MF_MT_FRAME_SIZE=W:1920 H : 1080, MF_MT_MPEG_SEQUENCE_HEADER=, MF_MT_MAJOR_TYPE=MFMediaType_Video, MF_MT_AM_FORMAT_TYPE=E06D80E3-DB46-11CF-B4D1-00805F6CBBEA, MF_MT_MPEG2_LEVEL=41, MF_MT_MPEG2_PROFILE=66, MF_MT_FIXED_SIZE_SAMPLES=1, MF_MT_FRAME_RATE=25/1, MF_MT_PIXEL_ASPECT_RATIO=1:1, MF_MT_SAMPLE_SIZE=1, MF_MT_INTERLACE_MODE=2, MF_MT_SUBTYPE=3F40F4F0-5622-4FF8-B6D8-A17A584BEE5E,

  


  


  I also looked on the sample metadata. I didn't find anything.
MFSampleExtension_CaptureMetadata

  


   HRESULT hr = videoSample->GetUnknown(MFSampleExtension_CaptureMetadata, IID_IMFAttributes, (void**)&pAttributes);


  


  Result

  


  


  hr = 0xc00d36e6 : The requested attribute was not found.
access to data stream with media-foundation

  


  


• how to set up a streaming media server with the h.264 RTP packets as input-stream

  29 septembre 2013, par chenakira

  As beginning there may be some confusion,however the destination is
  setting up a RTP stream-sever to transfer the real－time monitoring
  video to other systems over internet.

  While my input is not a local file or some other URL input streams.
  My program just gets the RTP h.264 packets,and want to use my setting-up RTP server to transfer this video.

  I've considered about using the ffmpeg+ffserver ,but ffserver.config
  file need to use the local file to configure the input source. Hope
  some guys give me some hint or any other resolution to implement my
  streaming-media server.

• segment : Report the current media sequence

  29 avril 2014, par Luca Barbato

  segment : Report the current media sequence
  Useful for debugging mostly.
  

  • [DH] libavformat/segment.c