eac3to - audio conversion tool

[nickintheforest]

Hello, madshi!
First of all, big THANK YOU for eac3to, especially for support and update this great program!
And I'd like to ask you one question: why you didn't add azid.dll to eac3to? There is some troubles to decode DD, because you have to demux DD with eac3to and decode it with azid or nicaudio for correctly decoding DD. You know, nero don't ignore DRC and libav downturn of high frequencies after 17 kHz. You can see (E-)AC3 decoders comparison here.
It would be very nice, if we can decode ac3 correctly only by eac3to, like "eac3to test.ac3 test.wavs -azid".
Thanks.

[soneca]

Thanks madshi!

[LigH]

nickintheforest ... the azid.dll should still be available from many BeSweet related sources.

[madshi]

Originally Posted by LigH

first of many new versions of eac3to...

Haha! My focus is still on madVR for the time being...

Originally Posted by nickintheforest

And I'd like to ask you one question: why you didn't add azid.dll to eac3to? There is some troubles to decode DD, because you have to demux DD with eac3to and decode it with azid or nicaudio for correctly decoding DD. You know, nero don't ignore DRC and libav downturn of high frequencies after 17 kHz. You can see (E-)AC3 decoders comparison here.
It would be very nice, if we can decode ac3 correctly only by eac3to, like "eac3to test.ac3 test.wavs -azid".

Sorry, no support for azid planned. The test you're linking to is 1.5 years old and the guy reponsible for the libav AC3 decoder has seen and commented on the test results those 1.5 years ago, too, so I would say a retest would be needed to make sure those results are still valid today. And if they are, a bug report should be created for libav/ffmpeg, so that the problem is fixed.

[Snowknight26]

For best AC3, E-AC3 and AAC decoding you need:
(1) Nero 7 (Nero 8 won't work!)
(2) Nero HD DVD / Blu-Ray plugin

Is that still accurate or is libavcodec on par now?

-phaseShift        shift phase (when doing stereo downmixing, see "down2")
-mixlfe            mix LFE in (when doing stereo downmixing, see "down2")

Should say downStereo instead of down2.

[LigH]

Not downStereo, but rather downDpl. Back channel phase shift is a typical feature of Dolby ProLogic downmixing; basic stereo downmixing would not care much about the back channels.

[88keyz]

Curious, why the change from Nero to libav as the preferred DD decoder?

[bilditup1]

This is a significant update. I'll have to redo audio for all my recent encodes. Thank you madshi!

[Snowknight26]

Errors that libavcodec spits out break the progress bar:

v02 Extracting video track number 2...
a03 Extracting audio track number 3...
v02 Muxing video to Matroska...
a03 Extracting TrueHD stream...
a03 Decoding with libav/ffmpeg...
a03 Reducing depth from 24 to 16 bits...
a03 Encoding FLAC with libFlac...
a03 Creating file "G:\brave.flac"...
a03 Skipping identical AC3 frames (seamless branching)...
-[truehd @ 009471a0] Lossless check failed - expected 00, calculated 15.
[truehd @ 009471a0] Lossless check failed - expected 00, calculated e7.
---[truehd @ 009471a0] End of stream indicated.
[truehd @ 009471a0] Lossless check failed - expected 00, calculated 91.

[robpdotcom]

Thanks for the update, madshi.

[bilditup1]

Originally Posted by madshi

eac3to v3.25 released

* added support for mixing any channel configuration to stereo/DPL

Hey there madshi,
This still doesn't appear to work with 5.0 DTS files.

[Guest]

Be a sport and give madshi a stream that he can use to reproduce that.

[bilditup1]

Originally Posted by neuron2

Be a sport and give madshi a stream that he can use to reproduce that.

Aye aye cap'n. It's an edge-case to be sure.
[removed link by tebasuna51]

[sundance]

@madshi:

Options:
-downDpl           downmix multi channel audio to Dolby Pro Logic II
-downStereo        downmix multi channel audio to simple Stereo
-phaseShift        shift phase (when doing stereo downmixing, see "down2")
-mixlfe            mix LFE in (when doing stereo downmixing, see "down2")

Since "down2" is deprecated, you might want to remove the references (see "down2") to avoid a newbie's confusion...
Anyway, thanks a lot for this invaluable tool!

[tebasuna51]

We can't support downloaded (and fake) files.

But is't true eac3to 3.25 don't downmix 5.0 files (tested DTS, AC3 and WAV).

madshi, thanks a lot for numerous fixes and improvements.

I asked that before and I don't want to annoy anyone, but I wanted to ask you, as a dev, personally - is there any chances for these ipms in a future versions?
• avi, mp4, mov, mpg, flv demuxing(maybe even muxing, that would be fantastic). Basically, avi/mp4 support is most important feature I think eac3to is lacking, along with
• Proper ac3 decoding. Whilst a freeware prog like azid can properly decode ac3, it's a real shame such powerful instrument as eac3to uses nero/libav for that, because both decoders has defects.
• and also, downmix to mono and ac3/dts dialnorm applying - minor, but still useful features.

/Thank you.

[phate89]

For noob people like me, what's the difference between downmix to dolby plII and to stereo?

[kukushka]

+1 for azid, thanks (anyway)

[tebasuna51]

@all
To report bugs please use the thread http://forum.doom9.org/showthread.php?t=166487

@get8p
please read http://forum.doom9.org/showthread.php?p=1608655#post1608655
and http://forum.doom9.org/showthread.php?t=166487
Use -keepDialnorm.

@phate89
a mix DPL II can recover the surround (more or less) with the appropiated decoder in audio receivers.

[phate89]

Originally Posted by tebasuna51

@phate89
a mix DPL II can recover the surround (more or less) with the appropiated decoder in audio receivers.

But if my goal is to convert the track to aac or mp3 through wav it's useless and i should use -downtostereo right?