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  • Les autorisations surchargées par les plugins

    27 avril 2010, par

    Mediaspip core
    autoriser_auteur_modifier() afin que les visiteurs soient capables de modifier leurs informations sur la page d’auteurs

  • Encoding and processing into web-friendly formats

    13 avril 2011, par

    MediaSPIP automatically converts uploaded files to internet-compatible formats.
    Video files are encoded in MP4, Ogv and WebM (supported by HTML5) and MP4 (supported by Flash).
    Audio files are encoded in MP3 and Ogg (supported by HTML5) and MP3 (supported by Flash).
    Where possible, text is analyzed in order to retrieve the data needed for search engine detection, and then exported as a series of image files.
    All uploaded files are stored online in their original format, so you can (...)

  • Supporting all media types

    13 avril 2011, par

    Unlike most software and media-sharing platforms, MediaSPIP aims to manage as many different media types as possible. The following are just a few examples from an ever-expanding list of supported formats : images : png, gif, jpg, bmp and more audio : MP3, Ogg, Wav and more video : AVI, MP4, OGV, mpg, mov, wmv and more text, code and other data : OpenOffice, Microsoft Office (Word, PowerPoint, Excel), web (html, CSS), LaTeX, Google Earth and (...)

Sur d’autres sites (5073)

  • 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.
enter image description here

    


    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

    


    


  • avcodec/mfenc : expose more properties of the media foundation encoder

    28 mars 2024, par Mark Samuelson
    avcodec/mfenc : expose more properties of the media foundation encoder
    • [DH] libavcodec/mf_utils.h
    • [DH] libavcodec/mfenc.c

  • Why does ffmpeg have to align to the power of 2 when processing crop_left ?

    13 mai 2021, par hansionz

    If performance is considered, why doesn't crop_top \ crop_left \ crop_right perform power-of-two alignment ?
enter image description here

    


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