"E distribution audio" discussion thread

[kierank]

The "E-distribution audio"* decoder that will eventually be integrated into VLC is ready for private testing and eventual public testing.
E-distribution audio is similar to AC3/EAC3 except it runs at a higher overall bitrate and contains more professional metadata.

Request for samples:

Any samples (16/20/24-bit) only in the .wav format.

Currently the decoder can decode most block types to an acceptable tolerance with some exceptions which will of course be fixed. Owing to use of SIMD in the transforms and windowing it should be significantly faster than any other decoder available.

* E-distribution audio is marketed commercially as "Dolby E".

[Rincewindx]

Thanks for the update.

Since you're looking for samples in WAV format, how do you recommend we demux the track out of a TS and dump it to WAV? Would the following VLC command line produce a suitable wave file?

VLC source.ts --sout-all --sout "#duplicate{dst='standard{access=file,mux=wav,dst=sample.wav}',select="es=4144"}"

Where source.ts is the transport stream, sample.wav is the destination WAV, and 4144 is the PID of the "E" track to demux.

[kierank]

To be honest I'm not sure if VLC's 302M demuxer will kick in when you try doing that. Try it and post a copy somewhere and I'll tell you if it worked.

It's not trivial to demux 337M audio encapsulated in TS using 302M right now using open source software.

[kierank]

Current Status:

Decoding works correctly for all tracks apart from LFE tracks. Decoding is very fast too.
UPDATE: LFE seems to be working too.

[Jean-Baptiste Kempf]

Current Status:

Decoding works correctly for all tracks apart from LFE tracks. Decoding is very fast too.
UPDATE: LFE seems to be working too.

Amazing

[proton]

Do you need any more samples?

And has anyone figured out how to extract the wav out of the dolby e stream?

Thanks,

[Jean-Baptiste Kempf]

Yes, we do need more samples.

[proton]

I do not know how to extract the wavs out of the transport streams, but I have three video/audio samples ready (if you need more or longer samples please let me know)

Where would you like me to upload them?

Thanks,
Paul

[Jean-Baptiste Kempf]

streams.videolan.org/upload/

[Skizzarz]

This sounds awesome!

Simply 2 things VLC needs to be the best media player on the face of the earth:

1) A proper channel mixer including dedicated LFE and maybe bass redirection. I use Foobar2000 as my audio player and have stumbled upon foo_channel_mixer which allows me to run the LFE to my sub-woofer although the bass redirection doesn't seem to work it may be nice, shrug.

2) Option to turn-off the computer after a media file has finished playing, like I was used to with Media Player Classic.

Stay on top, VLC!

Can't wait to see dedicated LFE included in the installation.

[ddichiera]

I had a need to play back a "Dolby E" file today and came across this thread.

Realising you still need samples, I tried to upload the file via: streams.videolan.org/upload/ but the upload failed. perhaps it's too big? (~1Mb)

Do you still want samples?

Dominic

[Jean-Baptiste Kempf]

Yes, we do.

[Alexandre Colucci]

Just wondering what the current status is. I just uploaded a Dolby E sample in 3 formats (transport stream, raw data, wav file) on streams.videolan.org/upload (the file is called DolbyESample.zip).

Thanks,
Alexandre