Dolby Digital EX 6.1 to HE-AAC!?

[Mc Onyx]

Can anyone tell me, is it possible to keep the 6.1 sound, when converting to HE-AAC, i mean i would like to transcode Dolby Digital EX 6.1 from my LOTR DVD's to HE-AAC. I'm using BeSweet for 5.1 DD to 5.1 HE-AAC and it works like charm, but what about DD EX, will the additional channel from Dolby Digital EX be kept, if i transcode it to 5.1 HE-AAC. If not is there a tool to do that! I searched the forum, but i didn't find anything! Thanks for all anwers!

[magicclue]

Can anyone tell me, is it possible to keep the 6.1 sound, when converting to HE-AAC...

EX = matrix encoded into the rear channels

The additional channel is encoded with a matrix into the rear channels like it's done with Dolby Surround.
So just go on as it's usual DD 5.1.

Convert it and all sound information will be there.

[Backflip]

Hhmm, interesting info. That was something I was going to ask about also, thanks :)

Now on a sidenote - does encoding from movie DVD's to HE-AAC using common today applications (latest version of Nero AAC encoder etc) still result in a 48 converted to 44.1 kHz AAC file?

[magicclue]

48KHz->44.1KHz
don't know ;)
--

Perhaps try yourself - or anyone?
If you refer to the commandline produced by besweetgui - use belight instead or write your own commandline.

[Backflip]

Hehehe, I think it still does. I gave a very recent Nero + Oagmachine a go, and yup the resulting file is downsampled to 44.1kHz. This is not ideal I think. Once it's possible to correctly go from AC3 to 48kHz AAC using a up-to-date install of Nero's AAC encoder + Oagmachine I'll be using AAC for everything :D

- not too keen on using the old install of Nero AAC encoder method that I've read about, surely it could mess up.

[SeeMoreDigital]

Hehehe, I think it still does. I gave a very recent Nero + Oagmachine a go, and yup the resulting file is downsampled to 44.1kHz. This is not ideal I think. Once it's possible to correctly go from AC3 to 48kHz AAC using a up-to-date install of Nero's AAC encoder + Oagmachine I'll be using AAC for everything :D

- not too keen on using the old install of Nero AAC encoder method that I've read about, surely it could mess up. You could try using Foobar 2000 to convert multi-channel AC3 to multi-channel AAC (LC or HE).

I've used it many times, and it does not down adjust the sample-rate. Plus, it also gives you the option to force a 48kHz output, even if the input was 44.1kHz.


Cheers

[magicclue]

are channel mappings correct if you transcode directly from 5.1 ac3 to 5.1 aac?
using foobar2000..?

[Backflip]

Thanks SeeMoreDigital :) Currently reading up on it at this thread:
http://forum.doom9.org/showthread.php?s=&threadid=67746

edit - Just tried a small 2CH sample (just what I could find at the time), it came out well. 6MB down to about 2MB (HE-AAC/Streaming preset). Kept 48kHz too :D Will try 6CH later today some time.

[SeeMoreDigital]

are channel mappings correct if you transcode directly from 5.1 ac3 to 5.1 aac?
using foobar2000..?Absolutely... 100% correctly mapped :)

[Kurtnoise]

does encoding from movie DVD's to HE-AAC using common today applications (latest version of Nero AAC encoder etc) still result in a 48 converted to 44.1 kHz AAC file?
No. If you have these results, update besweet and bsn.dll.

In addition, OAGMachine uses the old command for AAC transcoding. So, update to BeSweetGUI or BeLight if you want to use a GUI.

[Mc Onyx]

Thanks everyone for answers, i was away for 10 days, so it's a bit late, but better late than never :) thanks

[E-Male]

use bsn with parameters, don't use the configuration windows
and 48khz should be kept