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build_win32.txt21-Oct-20161.9K
ffmpeg_version.cmake21-Oct-2016382
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license.txt21-Oct-201626.8K
make.bat21-Oct-2016474
opencv_ffmpeg.dll21-Oct-201610M
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readme.txt21-Oct-20162K

readme.txt

      1 * On Linux and other Unix flavors OpenCV uses default or user-built ffmpeg/libav libraries.
      2   If user builds ffmpeg/libav from source and wants OpenCV to stay BSD library, not GPL/LGPL,
      3   he/she should use --enabled-shared configure flag and make sure that no GPL components are
      4   enabled (some notable examples are x264 (H264 encoder) and libac3 (Dolby AC3 audio codec)).
      5   See https://www.ffmpeg.org/legal.html for details.
      6   
      7   If you want to play very safe and do not want to use FFMPEG at all, regardless of whether it's installed on
      8   your system or not, configure and build OpenCV using CMake with WITH_FFMPEG=OFF flag. OpenCV will then use
      9   AVFoundation (OSX), GStreamer (Linux) or other available backends supported by opencv_videoio module.
     10   
     11   There is also our self-contained motion jpeg codec, which you can use without any worries.
     12   It handles CV_FOURCC('M', 'J', 'P', 'G') streams within an AVI container (".avi").
     13   
     14 * On Windows OpenCV uses pre-built ffmpeg binaries, built with proper flags (without GPL components) and
     15   wrapped with simple, stable OpenCV-compatible API.
     16   The binaries are opencv_ffmpeg.dll (version for 32-bit Windows) and
     17   opencv_ffmpeg_64.dll (version for 64-bit Windows).
     18   
     19   See build_win32.txt for the build instructions, if you want to rebuild opencv_ffmpeg*.dll from scratch.
     20 
     21   The pre-built opencv_ffmpeg*.dll is:
     22   * LGPL library, not BSD libraries.
     23   * Loaded at runtime by opencv_videoio module.
     24     If it succeeds, ffmpeg can be used to decode/encode videos;
     25     otherwise, other API is used.
     26 
     27   If LGPL/GPL software can not be supplied with your OpenCV-based product, simply exclude
     28   opencv_ffmpeg*.dll from your distribution; OpenCV will stay fully functional except for the ability to
     29   decode/encode videos using FFMPEG (though, it may still be able to do that using other API,
     30   such as Video for Windows, Windows Media Foundation or our self-contained motion jpeg codec).
     31   
     32   See license.txt for the FFMPEG copyright notice and the licensing terms.
     33