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Les articles publiés sur le site

• lavc : Add hevc_metadata bitstream filter

  23 juillet 2017, par Mark Thompson

  lavc: Add hevc_metadata bitstream filter
  
  This is able to modify some header metadata found in the VPS/SPS/VUI,
  and can also add/remove AUDs.
  

  • [DBH] configure
  • [DBH] doc/bitstream_filters.texi
  • [DBH] libavcodec/Makefile
  • [DBH] libavcodec/bitstream_filters.c
  • [DBH] libavcodec/h265_metadata_bsf.c

• imgutils : add function to clear an image to black

  22 juillet 2017, par wm4

  imgutils: add function to clear an image to black
  
  Black isn't always just memset(ptr, 0, size). Limited YUV in particular
  requires relatively non-obvious values, and filling a frame with
  repeating 0 bytes is disallowed in some contexts. With component sizes
  larger than 8 or packed YUV, this can become relatively complicated. So
  having a generic function for this seems helpful.
  
  In order to handle the complex cases in a generic way without destroying
  performance, this code attempts to compute a black pixel, and then uses
  that value to clear the image data quickly by using a function like
  memset.
  
  Common cases like yuv410p10 or rgba can't be handled with a simple
  memset, so there is some code to fill memory with 2/4/8 byte patterns.
  For the remaining cases, a generic slow fallback is used.
  
  Signed-off-by: Anton Khirnov <anton@khirnov.net>
  

  • [DBH] doc/APIchanges
  • [DBH] libavutil/imgutils.c
  • [DBH] libavutil/imgutils.h
  • [DBH] libavutil/version.h

• lavc, lavu : move frame cropping to a convenience function

  22 juillet 2017, par wm4

  lavc, lavu: move frame cropping to a convenience function
  
  Signed-off-by: Anton Khirnov <anton@khirnov.net>
  

  • [DBH] doc/APIchanges
  • [DBH] libavcodec/decode.c
  • [DBH] libavutil/frame.c
  • [DBH] libavutil/frame.h
  • [DBH] libavutil/version.h

• h264dec : track the last seen value of x264_build

  22 juillet 2017, par Anton Khirnov

  h264dec: track the last seen value of x264_build
  
  Do not use the one in the SEI directly as that is reset at certain
  points.
  
  Inspired by patches from Michael Niedermayer <michaelni@gmx.at> and
  Anton Mitrofanov <BugMaster@narod.ru>.
  
  CC: libav-stable@libav.org
  

  • [DBH] libavcodec/h264_direct.c
  • [DBH] libavcodec/h264_slice.c
  • [DBH] libavcodec/h264dec.c
  • [DBH] libavcodec/h264dec.h

• libavcodec/mjpeg_qsv : Add QSV MJPEG encoder

  21 juillet 2017, par Huang, Zhengxu

  libavcodec/mjpeg_qsv: Add QSV MJPEG encoder
  
  usage:
  -hwaccel qsv -c:v h264_qsv -i in -c:v mjpeg_qsv -global_quality 80 -f
  mjpeg out
  
  Signed-off-by: ChaoX A Liu <chaox.a.liu@gmail.com>
  Signed-off-by: Zhengxu Huang <zhengxu.maxwell@gmail.com>
  Signed-off-by: Andrew Zhang <huazh407@gmail.com
  Signed-off-by: Maxym Dmytrychenko <maxim.d33@gmail.com>
  

  • [DBH] Changelog
  • [DBH] configure
  • [DBH] libavcodec/Makefile
  • [DBH] libavcodec/allcodecs.c
  • [DBH] libavcodec/qsv.c
  • [DBH] libavcodec/qsvenc.c
  • [DBH] libavcodec/qsvenc_jpeg.c