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• libFLAC : CPUID detecion improvements.

  28 juin 2014, par Erik de Castro Lopo

  libFLAC : CPUID detecion improvements.
  According to docs, it’s incorrect to just call CPUID with EAX=1.
  
  One must to ensure that this value is supported.
  CPUs that don’t support CPUID level 1 are very old, but...
  
  if FLAC tests CPUID presence it should also test CPUID level support.
  Also the function FLAC__cpu_have_cpuid_asm_ia32 was simplified
  
  according to the docs at Intel website and in Wikipedia.
  Patch-from : lvqcl <lvqcl.mail@gmail.com>
  

  • [DH] src/libFLAC/cpu.c
  • [DH] src/libFLAC/ia32/cpu_asm.nasm

• 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.

• How to install MPD filter "ffmpeg" into MPD running on RaspberryPi [closed]

  13 mai, par Weston Mitchell

  I’m using Moode audio player OS on a Raspberry Pi 5 to play audio through two USB devices : headphones (card 3 : Device_1) for the full spectrum and a subwoofer (card 0 : Device) for low frequencies (20–100Hz) in a meditation lounge setup. The audio source is a NAS on a Mac. My goal is simultaneous playback : headphones in stereo, subwoofer in mono with low-pass filtering. I have configured the mpd.conf file to setup audio ouputs for both devices. Now I need to apply a lowpass filter to the subwoofer device. I tried using MDP's "ffmpeg" as a lowpass filter, but the logs say :

  


  


  Failed to initialize filter chain for "Subwoofer" : No such filter plugin : ffmpeg

  


  


  So I checked MPD's list of filters using mpd --version and it shows only one filter :

  


  


  Decoder plugins :
  
[mpg123] mp3
  
[mad] mp3 mp2
  
[vorbis] ogg oga
  
[oggflac] ogg oga
  
[flac] flac
  
[opus] opus ogg oga
  
[dsdiff] dff
  
[dsf] dsf
  
[faad] aac
  
[wavpack] wv
  
[adplug] amd d00 hsc laa rad raw sa2
  
[ffmpeg] 264 265 ...

  


  Filters :
  
soxr

  


  Tag plugins :
  
id3tag

  


  ...

  


  


  So it's listed as a Decoder, but not a as a filter. MPD docs says it can be used as a filter : MPD Docs - Filters

  


  So how do I add the ffmpeg to the list of filters ?