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• lavf/matroska: Removing experimental suffix for Opus

  12 September 2013, by Vignesh Venkatasubramanian

  lavf/matroska: Removing experimental suffix for Opus
  Removing the /EXPERIMENTAL suffix for codec id field for Opus. Doing this
  
  as the implementation of embedding Opus in Matroska is complete.
  Signed-Off By: Vignesh Venkatasubramanian <vigneshv@google.com>
  Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
  

  • [DH] libavformat/matroska.c

• avformat_open_input cannot open a file with raw opus audio data

  4 November 2020, by 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...
}


  


• ERROR: opus not found using pkg-config in msys64 on Windows

  10 August 2022, by prostargamer

  I'm trying to build ffmpeg.

  


  I downloaded msys2 x64 from the official website. This is the latest version.
  
Executed "pacman-Syu", rebooted msys and executed "pacman-Su".

  


  In your file build_ffmpeg_win.sh ffmpeg installs the following packages using pacman:
  

  


  pacman --noconfirm -Sy
pacman --noconfirm -S msys/make
pacman --noconfirm -S mingw64/mingw-w64-x86_64-opus
pacman --noconfirm -S pkg-config
pacman --noconfirm -S diffutils
pacman --noconfirm -S mingw-w64-x86_64-pkg-config


  


  Then I run "pacman -Qet" in order to get the list of packages:

  


  $ pacman -Qet
base 2020.12-1
diffutils 3.8-1
make 4.3-1
mingw-w64-x86_64-opus 1.3.1-4
pkg-config 0.29.2-4


  


  The opus package is installed.

  


  However, when I try to run "build_ffmpeg_win.sh", then I get the following error at the stage ./configure: "ERROR: opus not found using pkg-config"

  


  The following folders and files are located in the "msys64\mingw64\lib" folder:

  


  pkgconfig (folder)
libopus.a
libopus.dll.a


  


  There is an opus.pc file in the msys64\mingw64\lib\pkgconfig folder, the contents of which refer to /mingw64/lib and /mingw64/include.
pkg-config knows about opus, but for some reason this error occurs during ./configure.

  


  How can I solve this problem?