MediaEvent: PIPELINE_ERROR demuxer: could not open

[loretoparisi]

I have a mp3 audio in the html index page:

<audio id="audioAlertOK">
 <source src="assets/sounds/Sosumi.mp3" type="audio/mpeg">
</audio>

I try to preload the audio when the demux fails:

var audio=document.getElementById("audioAlertDONE");
if(audio) {
  audio.load();
  console.log("Playing audio %s",audio.src);
  audio.play();
}

I have found a related issue in Chromium: https://bugs.chromium.org/p/chromium/issues/detail?id=572628

NWJS version: nwjs-sdk-v0.13.3-osx-x64

[iteufel]

NW.js doesn't support mp3 out of the box.
Please read Enable Proprietary Codecs.

[loretoparisi]

@iteufel Yes I have update the so libraries using the soundnode build - see my comment here http://stackoverflow.com/questions/29590898/where-to-find-ffmpegsumo-libraries-for-nw-js-0-12-0-play-audio-files-in-nodewe/36463528#36463528

What happens is with nwjs-macappstore-v0.12.3-osx-x64 I can hear no sound, but no error, while using the nwjs-sdk-v0.13.3-osx-x64 I have the demux error. Both have the right lib there:

$ lipo -info ./nwjs Framework.framework/Libraries/ffmpegsumo.so is architecture: x86_6

File format is

$ ffpegm -i /assets/sounds/Glass.mp3
ffmpeg version 2.4.3 Copyright (c) 2000-2014 the FFmpeg developers
  built on Nov 18 2014 16:24:48 with Apple LLVM version 6.0 (clang-600.0.54) (based on LLVM 3.5svn)
  configuration: --prefix=/usr/local/Cellar/ffmpeg/2.4.3 --enable-shared --enable-pthreads --enable-gpl --enable-version3 --enable-nonfree --enable-hardcoded-tables --enable-avresample --cc=clang --host-cflags= --host-ldflags= --enable-libx264 --enable-libfaac --enable-libmp3lame --enable-libxvid --enable-libfreetype --enable-libtheora --enable-libvorbis --enable-libvpx --enable-librtmp --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libvo-aacenc --enable-libass --enable-ffplay --enable-libspeex --enable-libfdk-aac --enable-libopus --enable-frei0r --enable-libopenjpeg --disable-decoder=jpeg2000 --extra-cflags='-I/usr/local/Cellar/openjpeg/1.5.1_1/include/openjpeg-1.5 ' --enable-vda
  libavutil      54.  7.100 / 54.  7.100
  libavcodec     56.  1.100 / 56.  1.100
  libavformat    56.  4.101 / 56.  4.101
  libavdevice    56.  0.100 / 56.  0.100
  libavfilter     5.  1.100 /  5.  1.100
  libavresample   2.  1.  0 /  2.  1.  0
  libswscale      3.  0.100 /  3.  0.100
  libswresample   1.  1.100 /  1.  1.100
  libpostproc    53.  0.100 / 53.  0.100
Input #0, mp3, from '/assets/sounds/Glass.mp3':
  Metadata:
    encoder         : Lavf56.4.101
  Duration: 00:00:00.89, start: 0.025057, bitrate: 198 kb/s
    Stream #0:0: Audio: mp3, 44100 Hz, stereo, s16p, 192 kb/s
At least one output file must be specified

and I can play the file with afplay /assets/sounds/Glass.mp3.

[loretoparisi]

..uhm ok it's a bit complicated due to licensing issues, so it's better to

cd /assets/sounds/
for f in ./*.mp3; do ffmpeg -i "$f" -c:a libvorbis -q:a 4 "${f/%mp3/ogg}"; done

and then

<audio id="audioAlertOK">
 <source src="assets/sounds/Sosumi.mp3" type="audio/ogg">
</audio>

problem (partially) solved!

[rogerwang]

@loretoparisi so what's not solved?