eac3to - audio conversion tool

[ACrowley]

Originally Posted by tebasuna51

With your last test seems:

- Nuendo apply DRC and Dialog Norm.
- Azid-DRC only DRC
- Azid nothing (full dynamic)
- ffdshow only Dialog Norm.
- Tranzcode only DRC

yep, youre right...theres obviously no other possibility. So it makes my 1st Test useless!!

Nuendo certified Dolby Decoder seems to apply both, DRC and Dialog Normalization.
Can be true ,because you can see in the Options from Soft Encode Dolby Decoder and from Digigram, (both older certified Dolby Dec-Enc Versions) that youve few Options to change DRC and Dialog Norm for Ac3 to pcm decoding
But You cant change Decoder Options in Nuendo.
So Nuendos/Cubase default seems to be DRC/Dialog Norm Output, not nice..all my last AC3 reencodes from last the Years are all from Nuendo 3.2

Anybody know which Decoder Option is 100% "no" DRC AND Dialog Normalization in SoftEncode ? There are following DRC Decoder Options :
-Custom Analog /Dialog Norm
-Custom Mode / Digital Dialog Norm
-Line Out
-RF Remod Mode

The Softencode wave and RMS Values looks as like as Besweet (no DRC enabled) when RF Remod Mode is active. All other Modes are as like as Nuendo or Tranzcode.

I found this :

"Normal is similiar to 'Line out mode' and Heavy is similiar to 'RF-remod mode' of Sonic Foundary Soft Encode. It seems the WinDVD directshow filter (iviaudio.ax) invokes Heavy DRC also. However, Heavy is NOT recommended
because it usually results in obvious volume transitions, especially for music titles. "-Hiroko Hori (author of DVD2AVI) "

So ,why is the Wave with RF Mod from SoftEncode Output (DRC according to the Posting) the same compared with Besweet and "no" DRC ? Its all reversed ?!
Soft Encode Setting at "Line Out" is as like as Nuendo

All i want is to find a reference to decode AC3 to Wave "without DRC and Dialog Normalization.
Then i can compare TrueHD/EAC3 with AC3

[madshi]

Originally Posted by d0ORk

it's DD+ on the Test HDDVD

Well, demuxing + decoding via eac3to should work fine. There's no need to keep DD+ inside the EVO.

[d0ORk]

It cant decode it

Q:\test>"D:\_eac3to\eac3to.exe" "Q:\test\PEVOB_1_MERGED.rebuilt.
EVO" "Q:\test\PEVOB_1_MERGED.DD.6ch.s03.German 5.1.ac3" -448 -24
Muxing evo's first audio track to raw. Please wait...
Converting the raw file to wav. Please wait...
Converting the wav file to ac3. Please wait...

Aften: A/52 audio encoder
Version 0.07
(c) 2006-2007 Justin Ruggles, Prakash Punnoor, et al.

invalid or empty chunk in wav header
invalid wav file: -b
"aften" reported error code "1". A valid *.wav file was created sucessfully, tho
ugh.

Q:\test>

[madshi]

Try another Aften build. Maybe revision 449 or 433.

[d0ORk]

I just watched the .raw file while demuxing. It's just the name like 'example.raw' but it's always 0byte

[tebasuna51]

Originally Posted by ACrowley

All i want is to find a reference to decode AC3 to Wave "without DRC and Dialog Normalization.
Then i can compare TrueHD/EAC3 with AC3

Like I say you, use Azid-BeSweet, NicAudio-AviSynth or Foobar also.

[ACrowley]

Originally Posted by tebasuna51

Like I say you, use Azid-BeSweet, NicAudio-AviSynth or Foobar also.

Yeah..sure.
To bad that Nuendo decodes with DRC/DN without Options to change it ( 1000$ Software!)

But still 2 Questions :

1. Which Softencode DRC Mode is without DRC/DialogN. ?
2. Besweet Downmix Overflows
Its no Problem so far i know..only a warning and is relevant when downmixing to 2Ch right ?

greets

[d0ORk]

Somehow I got it to work.
But theres a problem left...

Q:\test>"D:\_eac3to\eac3to.exe" "Q:\test\PEVOB_1_MERGED.DD.6ch.s
03.German 5.1.ddp" "Q:\corpse_demux\PEVOB_1_MERGED.DD.6ch.s03.German 5.1.ac3"
-448
E-AC3, 5.1 channels, 1:17:12, 640kbit/s, 48khz
Muxing eac3 file to raw. Please wait...
The NCBENUM return code is: 0x0
The NCBENUM return code is: 0x0
Audio Decoder output was 24 bit this time.
Unfortunately the Audio Decoder has output only 2 channels.
Converting the raw file to wav. Please wait...
Converting the wav file to ac3. Please wait...

Aften: A/52 audio encoder
Version SVN
(c) 2006-2007 Justin Ruggles, Prakash Punnoor, et al.

input format: Signed 24-bit 48000 Hz 5.1-channel
output format: 48000 Hz 3/2 + LFE

progress: 100% | q: 233.2 | bw: 34.0 | bitrate: 448.0 kbps

Done.

Q:\test>

How can I get it to be 5.1?

Thanks for your help

[arty]

Originally Posted by ACrowley

Yeah..sure.
To bad that Nuendo decodes with DRC/DN without Options to change it ( 1000% Software!)

But still 2 Questions :

1. Which Softencode DRC Mode is without DRC/DialogN. ?
2. Besweet Downmix Overflows
Its no Problem so far i know..only a warning and is relevant when downmixing to 2Ch right ?

greets

I got overflows even when set -6ch in besweet ... (decode to 6 mono waves). So the resulted wavs' waveform seems a bit "flat" where they reached the "maximum" ...

[madshi]

Originally Posted by d0ORk

Unfortunately the Audio Decoder has output only 2 channels.

Try changing the Sonic filter settings (see Control Panel -> CinePlayer).

[d0ORk]

it works.
Thanks for all your help.
Now I'm trying to get the thing to .mkv with megui.
Wish me some luck.

[ACrowley]

Originally Posted by arty

I got overflows even when set -6ch in besweet ... (decode to 6 mono waves). So the resulted wavs' waveform seems a bit "flat" where they reached the "maximum" ...

So far i know it has no Effect. Its only a Warning.
But maybe it can cause Problems when you donwmix 5.1 to stereo.
But when you decode all channles it will not have any Effect

Anway, The Optimum would be to decode AC3 to wave with certified Dolby Decoder.
To Bad Nunedo outputs DRC without any Decoder Options ( 1000$!)
Soft Encode/Digigram has a Dolby Decoder too ( Dolby Engine too)..but as i say above i dont know wich Option means 100% "No" DRC/D.N

Besweet/Foobar is fine so far

[tebasuna51]

Originally Posted by ACrowley

So far i know it has no Effect. Its only a Warning.
But maybe it can cause Problems when you donwmix 5.1 to stereo.
But when you decode all channles it will not have any Effect

The typical azid warning:
W7: Downmix overflow (1: +0dB)
is not related with channels downmix and is produced when the decoder, translating from frequency domain to time domain, reach a value upper to 0 dB and can't be translated exactly.

Is not a problem and must be assumed like others imperfections in the encoder/decoder process with lossy formats.

Soft Encode/Digigram has a Dolby Decoder too ( Dolby Engine too)..but as i say above i dont know wich Option means 100% "No" DRC/D.N
But when RF Remod is similar to heavy(=loud) it should be the Full Dynamic Range, it makes Sense. Lineout= DRC+DN

- Custom analog: DRC only
- Custom digital: DRC + DN
- Line Out: also DRC + DN
- RF Remod Mode: DRC + Gain (+8 dB in my sample but I don't know the reason)

Then RF Remod Mode is not Full Dynamic Range.

[ACrowley]

Originally Posted by tebasuna51

The typical azid warning:
W7: Downmix overflow (1: +0dB)
is not related with channels downmix and is produced when the decoder, translating from frequency domain to time domain, reach a value upper to 0 dB and can't be translated exactly.

Is not a problem and must be assumed like others imperfections in the encoder/decoder process with lossy formats.


- Custom analog: DRC only
- Custom digital: DRC + DN
- Line Out: also DRC + DN
- RF Remod Mode: DRC + Gain (+8 dB in my sample but I don't know the reason)

Then RF Remod Mode is not Full Dynamic Range.

Yes, youre Right, thats waht it looks like :




I made AC3 reencodes from all waves . These Settings should keep alwys Source Volume Level:
http://forum.doom9.org/showthread.ph...ght=Sony+Vegas

The AC3 Reencode from Azid Waves with disabled DRC/DN sounds perfect Same Dynamics/Wavestructure/RMS Value ,compared with the AC3 Source.

Reencodes from SoftEncode "RF Mode Wave" plays at lower Volume in loud Dynamic Parts but a little bit gained...so youre Right
I cant find any Soft Encode decoding Mode with all disabled and full Dynamic Range..strange

At least you can see in the Screenshot NeroAudioDecoder decodes AC3 with full DRC+DialogNormalization.
No Effect from Showtime Options. Sonic applies DRC and or DialogN. too.

However , the AC3 decoding Thing is cleared for me. THX

[madshi]

@ACrowley, could you make that test ac3 file available, please?

[ACrowley]

Once again with TrueHD ,This is from the 300 HDDVD :




The Decoded Wave has less dynamics as like as the DVD AC 448kbps

I tried to change the NeroShowtime Options, but no Effect!

Originally Posted by madshi

@ACrowley, could you make that test ac3 file available, please?

I used this AC3 file for my last Test.
This AC3 Sample is perfect for a Testrun because it has a lot of dynamic Sounds and a Speech Part

http://rapidshare.com/files/45393728...ample.ac3.html

EDIT:
...can be true maybe its only DalogNormalization
I will compare it with Azid and DialogNormalization

[madshi]

Originally Posted by ACrowley

Nero applies DRC on TrueHD Decoding. The Decoded Wave has less dynamics as like as the DVD AC 448kbps

Are you sure that it's not just lower volume (dialnorm?)? Looking at the screenshot it seems to me that everything is just not as loud as in the AC3 WAV.

In your previous tests with the Serenity AC3, the first half of the AC3 was significantly compressed with the DRC decoders, but the 2nd half was more or less identical to the non DRC decoders. So there it was clearly visible that the DRC compresses some parts of the track but not everything. In your 300 test I don't see this behaviour. It seems to me that the whole TrueHD decode is just of lower volume.

Or am I wrong?

Originally Posted by ACrowley

I used this AC3 file for my last Test.
This AC3 Sample is perfect for a Testrun because it has a lot of dynamic Sounds and a Speech Part

Yeah, that's a very good test AC3. Thanks!

[madshi]

Here are my test results with Nero. I've tried the Nero filters through GraphEdit. And I've also checked what Nero outputs if you use Nero "ShowTime". It seems that the DRC setting in ShowTime does affect AC3 decoding, but only inside of ShowTime. When using the Nero filter in GraphEdit, AC3 decoding seems to have very strong DRC applied. Here are the results:



First wav is "Nero filter in GraphEdit". Second wav is "ShowTime with DRC turned on to 50%". Third wav is "ShowTime with DRC turned off". The third wav looks fine to me. It seems to have dialnorm applied, but no DRC.

[Wilbert]

Try changing the Sonic filter settings (see Control Panel -> CinePlayer).

Any idea what the environment setting is doing in the audio tab?

[madshi]

Originally Posted by Wilbert

Any idea what the environment setting is doing in the audio tab?

Nope.