Dolby TrueHD to AAC?

[rtjnyoface]

Is this possible at this time? I used megui to do it and the processing time was around two hours! WTF?

Is this just how difficult it is to process DTHD? Have I not encoded correctly?

[nurbs]

You don't give enough information for an answer.
Did you convert the audio with the HD Stream extractor? Did you only convert the audio or also extract other tracks?

[tebasuna51]

If you have eac3to, and NeroAacEnc in the same folder, you can use:

eac3to audio.thd audio.m4a -quality=0.45

(default quality is 0.5, valid values until 1.0, less than 0.32 make HE aac)

[rtjnyoface]

You don't give enough information for an answer.

I didn't think the question was all THAT vague. If my memory serves me correctly I think I used tsmuxer and demuxed it (all streams separate). So I had a ac3 file (truehd) and I encoded it using megui and it said it would take about 2 hours.

All I want to do is encode the HD audio I demux from a blu ray dvd whether it be Dobly TrueHD or DTS.

If you have eac3to, and NeroAacEnc in the same folder, you can use:

eac3to audio.thd audio.m4a -quality=0.45

(default quality is 0.5, valid values until 1.0, less than 0.32 make HE aac)

Wow. Tried doing that in the gui and I couldn't find the place to enter a command line code. I couldn't even find a way to do it in the gui period.

[Altaria]

Here look at this, here are a few examples for the eac3to command line:

http://en.wikibooks.org/wiki/Eac3to/How_to_Use

[rtjnyoface]

Apparently you have to have surcode in order to decode DTHD?

[rack04]

Apparently you have to have surcode in order to decode DTHD?

Where did you read that? SurCode is for DTS encoding.

TrueHD decoding can be archived through:

* Nero 7 (version 7.8.5.0 or newer, Nero 8 won't work) accompanied with Nero Blu-ray / HD DVD plugin (commercial software)
* Libav / ffmpeg decoder (freeware, ships with eac3to package)

[rtjnyoface]

um...I didn't see anything that referred to aac.

[rtjnyoface]

If you have eac3to, and NeroAacEnc in the same folder, you can use:

eac3to audio.thd audio.m4a -quality=0.45


Is there a way to do that in the gui? From what I can see the gui doesn't even have an aac extension nor a place to enter bit rate and such. Are we not able to use besweet?

[nurbs]

I didn't think the question was all THAT vague. If my memory serves me correctly I think I used tsmuxer and demuxed it (all streams separate). So I had a ac3 file (truehd) and I encoded it using megui and it said it would take about 2 hours..
Yes, the question was that vague, because now you told me that you tried doing the audio conversion the "wrong" way. You extracted the file loaded it up in the main audio encoding dialog in megui and encoded it that way, but there is a much more elegant way to do that.

As tebasuna51 suggested, eac3to is the way to go. MeGUI comes with an "HD Stream extractor" in the tools(?) menu which is a GUI for eac3to and does all the extraction and audio conversion. You use it to open the Blu-ray folder on your harddrive, select a playlist and it will display all the tracks in the bottom window. You tick the checkboxes next to the tracks you want to extract, and on the audio tracks you select AAC in the dropdown menu. You can specify options right next to it and that's where you enter -quality=0.45 and other options you want applied upon conversion. For a list of the different options see the readme that comes with eac3to.

You have to make sure the nero encoder .exe is in the MeGUI/tools/eac3to folder or else eac3to won't find it.

Also, depending on how long the movie is, how many tracks you extract and if eac3to has to do 2 passes to get the audio conversion right it might take a while, but it shouldn't take 2 hours just to encode a single audio track (unless your pc is really slow).