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Les articles publiés sur le site

• ffv1 : Error out on unsupported format

  16 juin 2016, par Jerome Martinez

  ffv1: Error out on unsupported format
  
  Transparency is supported only by YUV and within specific bit depths.
  

  • [DBH] libavcodec/ffv1dec.c

• mov : Implement support for multiple sample description tables

  15 juin 2016, par Vittorio Giovara

  mov: Implement support for multiple sample description tables
  
  Store data from each stsd in a separate extradata buffer, keep track of
  the stsc index for read and seek operations, switch buffers when the
  index differs. Decoder is notified with an AV_PKT_DATA_NEW_EXTRADATA
  packet side data.
  
  Since H264 supports this notification, and can be reset midstream, enable
  this feature only for multiple avcC's. All other stsd types (such as
  hvc1 and hev1) need decoder-side changes, so they are left disabled for
  now.
  
  This is implemented only in non-fragmented MOVs.
  
  Signed-off-by: Vittorio Giovara <vittorio.giovara@gmail.com>
  

  • [DBH] libavformat/isom.h
  • [DBH] libavformat/mov.c

• pixdesc : Add new SMPTE 431, 432, and 2085 color properties

  15 juin 2016, par Vittorio Giovara

  pixdesc: Add new SMPTE 431, 432, and 2085 color properties
  
  Appeared in H.264 2016/02.
  
  Signed-off-by: Vittorio Giovara <vittorio.giovara@gmail.com>
  

  • [DBH] libavcodec/options_table.h
  • [DBH] libavcodec/version.h
  • [DBH] libavutil/pixdesc.c
  • [DBH] libavutil/pixfmt.h
  • [DBH] libavutil/version.h

• pixfmt : Add ARIB STD-B76 color transfer characteristic

  15 juin 2016, par Neil Birkbeck

  pixfmt: Add ARIB STD-B76 color transfer characteristic
  
  Adding hybrid log-gamma (https://en.wikipedia.org/wiki/Hybrid_Log-Gamma)
  based on the standardization in ARIB STD-B67:
  http://www.arib.or.jp/english/html/overview/doc/2-STD-B67v1_0.pdf
  
  The choice of enum value of 18 is consistent with HEVC:
  http://phenix.it-sudparis.eu/jct/doc_end_user/current_document.php?id=10481
  
  And also with latest proposal for color format in mkv:
  https://mailarchive.ietf.org/arch/search/?email_list=cellar&gbt=1&q=Colour+Format+proposal
  
  Signed-off-by: Vittorio Giovara <vittorio.giovara@gmail.com>
  

  • [DBH] libavcodec/options_table.h
  • [DBH] libavcodec/version.h
  • [DBH] libavutil/pixdesc.c
  • [DBH] libavutil/pixfmt.h
  • [DBH] libavutil/version.h

• FATE : add a test for H.264 with two fields per packet

  15 juin 2016, par Anton Khirnov

  FATE: add a test for H.264 with two fields per packet
  

  • [DBH] tests/fate/h264.mak
  • [DBH] tests/ref/fate/h264-twofields-packet