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• How to open MIL avi video fiile

  12 février 2017, par ahme0307

  I have some (AVI) videos with MIL(Matrox Imaging Library) codec. I have tried multiple codecs but i am not able to open.
  I have tried VLC, K-lite codecs,ffmpeg, here is the log file from k-Lite

  >##LAV Splitter Source (internal)::Video
  
  >
  
  >Media Type 0:
  
  >--------------------------
  
  >Video: MIL  256x256 5fps 489kbps
  
  >AM_MEDIA_TYPE: 
  
  >majortype: MEDIATYPE_Video {73646976-0000-0010-8000-00AA00389B71}
  
  >subtype: Unknown GUID Name {204C494D-0000-0010-8000-00AA00389B71}
  
  >formattype: FORMAT_VideoInfo {05589F80-C356-11CE-BF01-00AA0055595A}
  
  >bFixedSizeSamples: 0
  
  >bTemporalCompression: 1
  
  >lSampleSize: 1
  
  >cbFormat: 128
  
  >
  
  >VIDEOINFOHEADER:
  
  >rcSource: (0,0)-(256,256)
  
  >rcTarget: (0,0)-(256,256)
  
  >dwBitRate: 489508
  
  >dwBitErrorRate: 0
  
  >AvgTimePerFrame: 2000000
  
  >
  
  >BITMAPINFOHEADER:
  
  >biSize: 80
  
  >biWidth: 256
  
  >biHeight: 256
  
  >biPlanes: 1
  
  >biBitCount: 24
  
  >biCompression: MIL 
  
  >biSizeImage: 196608
  
  >biXPelsPerMeter: 0
  
  >biYPelsPerMeter: 0
  
  >biClrUsed: 0
  
  >biClrImportant: 0
  
  >
  
  >pbFormat:
  
  >
  
  >

  I also tried ffplay and here is the output
  

  The only software i came across that can open this video is from Matrox and it doesn’t allow exporting to other formats
  
  I appreciate if some one can direct me to codecs that can handle this videos. I would like convert to other video formats for further processing.

• avformat_open_input cannot open a file with raw opus audio data

  4 novembre 2020, par bbdd

  I have a problem when trying to open a binary file containing raw audio data in opus format. When I try to open this file, the library returns an error : Unknown input format : opus.

  


  How can I open this file ?

  


  I need to open it and write all the raw audio data to an audio container. I understand that the opus format is intended only for encoding. I realized this using command :

  


  $ ffmpeg -formats | grep Opus

ffmpeg version 3.4.4 Copyright (c) 2000-2018 the FFmpeg developers
  E opus Ogg Opus # For only encoding


  


  Then what format should I use to open this file ? With ogg ? I tried, but there are also problems with opening the outgoing file. I provide the code that shows only the necessary part to open the file :

  


  int main(int argc, char *argv[])
{
    // ...

    av_register_all();

    AVFormatContext *iFrmCtx = nullptr;
    AVFormatContext *oFrmCtx = nullptr;
    AVPacket packet;

    const char *iFilename = "opus.bin"; // Raw audio data with `opus` format
    const char *oFilename = "opus.mka"; // Audio file with `opus` audio format

    AVDictionary* frmOpts = nullptr;
    const qint32 smpRateErrorCode = av_dict_set_int(&frmOpts, "sample_rate", 8000,  0);
    const qint32 bitRateErrorCode = av_dict_set_int(&frmOpts, "bit_rate",    64000, 0);
    const qint32 channelErrorCode = av_dict_set_int(&frmOpts, "channels",    2,     0);
    if (smpRateErrorCode < 0 ||
            bitRateErrorCode < 0 ||
                channelErrorCode < 0) {
        return EXIT_FAILURE;
    }

    AVInputFormat *iFrm = av_find_input_format("opus"); // Error: Unknown input format
    if (iFrm == nullptr) {
        av_dict_free(&frmOpts);
        return EXIT_FAILURE;
    }

    qint32 ret = 0;
    if ((ret = avformat_open_input(&iFrmCtx, iFilename, iFrm, &frmOpts)) < 0) {
        av_dict_free(&frmOpts);
        return EXIT_FAILURE;
    }

    // We're doing something...
}


  


• win32 : Allow other programs to open the same files

  20 janvier 2012, par Reimar Döffinger

  win32 : Allow other programs to open the same files