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• cygwin : Enable MSVS support

  8 août 2015, par Henrik Gramner

  cygwin : Enable MSVS support
  `cl -showIncludes` creates absolute Windows paths for some files, attempt
  
  to convert those to Unix paths.
  Use relative paths for dependencies located in or below the working directory
  
  in order to mimic the behavior of gcc and to make the paths more readable.
  Make the dependency generation script a bit more robust in general.
  

  • [DH] configure
  • [DH] tools/msvsdepend.sh

• JavaCV pass video frame to imread()

  6 décembre 2017, par Tina J

  I’m trying to use JavaCV for template matching. The demo example is located here. I add all their .jar files to the project. I need to pass a video frame (say video.mp4’s last frame) to imread() instead of it reading the source image from file. How can I do that ?

  String [] arg={"laff.png","template.png"};
  
  FrameGrabber grabber = new FFmpegFrameGrabber("video.mp4");
  
  System.out.println(grabber.getFrameRate());    //returns 0???
  
  
  
  // read in image default colors
  
  Mat sourceColor = imread(args[0]);   // pass last frame of video.mp4 instead of args[0]

  UPDATE : I now can pass [the first] video frame to imread() using the following way (key point is to call start()). So I got the conversion done. Now I need to know how to grab a particular frame number, say the last frame.

  FFmpegFrameGrabber grabber = new FFmpegFrameGrabber("video.mp4");
  
  grabber.start();
  
  System.out.println(grabber.getLengthInTime());
  
  OpenCVFrameConverter.ToMat converter = new OpenCVFrameConverter.ToMat();

• avcodec/cuvid : Add support for P010/P016 as an output surface format

  22 novembre 2016, par Philip Langdale

  avcodec/cuvid : Add support for P010/P016 as an output surface format
  The nvidia 375.xx driver introduces support for P016 output surfaces,
  
  for 10bit and 12bit HEVC content (it’s also the first driver to support
  
  hardware decoding of 12bit content).
  The cuvid api, as far as I can tell, only declares one output format
  
  that they appear to refer to as P016 in the driver strings. Of course,
  
  10bit content in P016 is identical to P010, and it is useful for
  
  compatibility purposes to declare the format to be P010 to work with
  
  other components that only know how to consume P010 (and to avoid
  
  triggering swscale conversions that are lossy when they shouldn’t be).
  For simplicity, this change does not maintain the previous ability
  
  to output dithered NV12 for 10/12 bit input video - the user will need
  
  to update their driver to decode such videos.
  

  • [DH] compat/cuda/dynlink_cuviddec.h
  • [DH] libavcodec/cuvid.c
  • [DH] libavcodec/version.h