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• flac/metaflac : Limit the size of metadata blocks

  1er mai 2016, par Erik de Castro Lopo

  flac/metaflac : Limit the size of metadata blocks
  Limit allow image file size to slightly less than 2^24 bytes so that
  
  the file size plus extra house keeping data is strictly less that
  
  2^24 bytes in size.
  Patch-from : lvqcl <lvqcl.mail@gmail.com>
  

  • [DH] src/libFLAC/metadata_object.c
  • [DH] src/share/grabbag/picture.c

• libx265 motion compensation and CU traverse

  17 juin 2016, par Ariana

  I’m trying to play with the H.265 motion compensation and search (HEVC- libx265 implementation from here : https://bitbucket.org/multicoreware/x265/downloads). I need to slightly extend the edge extension search, and fill the macro block with left-most pixels as if my sample videos are like cylinder (rightmost is connected to leftmost).

  What I need to do is basically this :

  

  One way to do that is to modify the edge extension area (which is already in the code, in the frameFilter.cpp), and do that for rightmost and fill parts of blocks which are out with leftmost pixels. I identified the piece of code here which apparently is responsible for that. Can someone help me with implementing this feature ?

  if ((col == 0) | (col == m_frameFilter->m_numCols - 1))
  
      {
  
          // TODO: improve by process on Left or Right only
  
          primitives.extendRowBorder(reconPic->getLumaAddr(m_rowAddr), stride, reconPic->m_picWidth, realH, reconPic->m_lumaMarginX);
  
  
  
          if (m_frameFilter->m_param->internalCsp != X265_CSP_I400)
  
          {
  
              primitives.extendRowBorder(reconPic->getCbAddr(m_rowAddr), strideC, reconPic->m_picWidth >> hChromaShift, realH >> vChromaShift, reconPic->m_chromaMarginX);
  
              primitives.extendRowBorder(reconPic->getCrAddr(m_rowAddr), strideC, reconPic->m_picWidth >> hChromaShift, realH >> vChromaShift, reconPic->m_chromaMarginX);
  
          }
  
      }
  
  
  
      // Extra Left and Right border on first and last CU
  
      if ((col == 0) | (col == m_frameFilter->m_numCols - 1))
  
      {
  
          copySizeY += lumaMarginX;
  
          copySizeC += chromaMarginX;
  
      }
  
  
  
      // First column need extension left padding area and first CU
  
      if (col == 0)
  
      {
  
          pixY -= lumaMarginX;
  
          pixU -= chromaMarginX;
  
          pixV -= chromaMarginX;
  
      }

• Merge commit ’92fdea37477b5a2d1329e5ef0773e24473fa8f12’

  11 mai 2016, par Derek Buitenhuis

  Merge commit ’92fdea37477b5a2d1329e5ef0773e24473fa8f12’
  These are all trivial to merge.
  * commit ’92fdea37477b5a2d1329e5ef0773e24473fa8f12’ :
  
    vaapi_h265 : Add -qp option, use it to replace use of -global_quality
  
    vaapi_h265 : Add constant-bitrate encode support
  
    vaapi_h264 : Add encode quality option (for quality-speed tradeoff)
  
    vaapi_h264 : Add -qp option, use it to replace use of -global_quality
  
    vaapi_encode : Add support for codec-local options
  
    vaapi_h264 : Add constant-bitrate encode support
  
    vaapi_encode : Refactor slightly to allow easier setting of global options
  Merged-by : Derek Buitenhuis <derek.buitenhuis@gmail.com>
  

  • [DH] libavcodec/vaapi_encode.c
  • [DH] libavcodec/vaapi_encode.h
  • [DH] libavcodec/vaapi_encode_h264.c
  • [DH] libavcodec/vaapi_encode_h265.c
  • [DH] libavcodec/vaapi_encode_mjpeg.c