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• lavfi : add opencl tonemap filter

  19 juin 2018, par Ruiling Song

  lavfi : add opencl tonemap filter
  This filter does HDR(HDR10/HLG) to SDR conversion with tone-mapping.
  An example command to use this filter with vaapi codecs :
  
  FFMPEG -init_hw_device vaapi=va :/dev/dri/renderD128 -init_hw_device \
  
  opencl=ocl@va -hwaccel vaapi -hwaccel_device va -hwaccel_output_format \
  
  vaapi -i INPUT -filter_hw_device ocl -filter_complex \
  
  '[0:v]hwmap,tonemap_opencl=t=bt2020:tonemap=linear:format=p010[x1] ; \
  
  [x1]hwmap=derive_device=vaapi:reverse=1' -c:v hevc_vaapi -profile 2 OUTPUT
  Signed-off-by : Ruiling Song <ruiling.song@intel.com>
  

  • [DH] configure
  • [DH] libavfilter/Makefile
  • [DH] libavfilter/allfilters.c
  • [DH] libavfilter/colorspace.c
  • [DH] libavfilter/colorspace.h
  • [DH] libavfilter/opencl/colorspace_common.cl
  • [DH] libavfilter/opencl/tonemap.cl
  • [DH] libavfilter/opencl_source.h
  • [DH] libavfilter/vf_tonemap_opencl.c

• lavfi : make vf_colorspace use functions from colorspace.c

  19 juin 2018, par Ruiling Song

  lavfi : make vf_colorspace use functions from colorspace.c
  These functions are shared among colorspace related filters.
  Signed-off-by : Ruiling Song <ruiling.song@intel.com>
  

  • [DH] libavfilter/Makefile
  • [DH] libavfilter/vf_colorspace.c

• nw.js node WebKit - unable to play audio file

  9 novembre 2018, par Allasso

  I have started working with nw.js, creating a test app to play audio files from. I am working on OS X 10.11.

  The code for the player is :

  <audio controls="controls">
  
    <source src="path/to/file/song.mp3" type="audio/mp3">
  
  </source></audio>

  The player and controls appear, but the file will not play. I have tried using a relative path, and an absolute path, trying both
  "/path/to/file/song.mp3"
  and
  "file :///path/to/file/song.mp3"
  schemes.

  I have verified the path is valid in all cases.

  This page :

  http://docs.nwjs.io/en/latest/For%20Developers/Enable%20Proprietary%20Codecs/

  tells me that mp3 should be supported (for v0.22.1+, though I haven’t found a way to tell the version of my mp3, though is was made recently so I assume is the the latest codec.)

  Just to try more stuff, I followed the instructions on these pages :

  http://docs.nwjs.io/en/latest/For%20Developers/Enable%20Proprietary%20Codecs/
  (It appears mp3 gained support since this doc came out.)

  https://github.com/nwjs/nw.js/wiki/Using-MP3-%26-MP4-%28H.264%29-using-the—video—%26—audio—tags.

  I downloaded the ffmpeg libs from here :

  https://github.com/iteufel/nwjs-ffmpeg-prebuilt/releases

  and placed copies here :

  find . -name libffmpeg.dylib
  
  ./dist/nw.js-examples/osx64/nw.js-examples.app/Contents/Versions/67.0.3396.87/libffmpeg.dylib
  
  ./node_modules/nw/nwjs/nwjs.app/Contents/Versions/54.0.2840.99/nwjs Framework.framework/libffmpeg.dylib
  
  ./node_modules/nw-builder/cache/0.31.2-sdk/osx64/nwjs.app/Contents/Versions/67.0.3396.87/libffmpeg.dylib
  
  cp ~/Downloads/libffmpeg.dylib ./dist/nw.js-examples/osx64/nw.js-examples.app/Contents/Versions/67.0.3396.87/libffmpeg.dylib
  
  cp ~/Downloads/libffmpeg.dylib "./node_modules/nw/nwjs/nwjs.app/Contents/Versions/54.0.2840.99/nwjs Framework.framework/libffmpeg.dylib"
  
  cp ~/Downloads/libffmpeg.dylib "./node_modules/nw-builder/cache/0.31.2-sdk/osx64/nwjs.app/Contents/Versions/67.0.3396.87/libffmpeg.dylib"

  Still to no avail running either

  npm run dev

  or

  npm run prod

  and opening the packaged app.

  I can play the file fine with the same code from a web browser.

  I don’t know what else to try, help would be much appreciated, thanks.