True-HD audio how to input Scenarist BD 5.0?

[24673583]

Hi!
True-HD audio how to input Scenarist BD 5.0?

:thanks:

[rik1138]

What's the source of your THD file? If it's ripped from an existing disc, you have to demux the lossless part (the MLP stream, name it something.MLP) from the AC3 legacy stream (use eac3to or something...). You then drag the AC3 file into Scenarist. When it asks you what it is, select 'Dolby Lossless' from the list. It will then prompt you to select the lossless stream (the MLP file), and it will import both streams (but list them as one lossless stream) into the DataTree.

[24673583]

What's the source of your THD file? If it's ripped from an existing disc, you have to demux the lossless part (the MLP stream, name it something.MLP) from the AC3 legacy stream (use eac3to or something...). You then drag the AC3 file into Scenarist. When it asks you what it is, select 'Dolby Lossless' from the list. It will then prompt you to select the lossless stream (the MLP file), and it will import both streams (but list them as one lossless stream) into the DataTree.


Hi, rik1138
The first, I thank you very much!
I use BD Reauthor Pro demux from an existing disc.
I only find one ac3 file and not find MLP file.
I don`t konw how to demux MLP file...

[24673583]

I have an existing disc,The movie is TRUE-HD audio.
If i want input this audio to scenarist bd5.0,
I must to demux the lossless part(mlp/vr file) and the AC3 legacy stream.
I try use BD Reauthor Pro to demux it. but only ac3 file be demux.
who can tell me ,how to demux the lossless audio stream?
thanks!:)

[rik1138]

BD Reauthor just leaves the .AC3 extension on the Dolby Lossless file. That should be the muxed file (check the size of it, if it's for a feature-length film, an AC3 audio track would be less than a GB, possibly even less than 500 MB. If your AC3 file is 2-3GB or more, it's the lossless file).

Just run it through eac3to to get the separate MLP and AC3 files.

For example, on my disc I get a 3GB file called:
00000_1_01.ac3
Which is way too big for a 2-hour AC3 file. Run it through eac3to:
eac3to 00000_1_01.ac3 00000.ac3 and then
eac3to 00000_1_01.ac3 00000.thd

the new files 00000.ac3 and 00000.thd would be your AC3 and MLP streams (rename the .thd to .mlp).

Try that, see if it works for you. (I'm testing this again to make sure it works...)

[Edit]- Yep, it works... :)

[24673583]

1.I use BD Reauthor Pro demux this audio,Drag this AC3(3G)audio to tsMuxerGUI marked True-hd
2.Run it through eac3to, get a ac3 file and a thd file.
3.Rename the.thd to .mlp
4.Drag ac3 file to Scenarist BD and select 'Dolby Lossless', It not prompt me to select the lossless stream(Mlp file)
5.AC3 file be import,Data format : dolby lossless - -!! (one ac3 file....)

[rik1138]

So, it worked? I'm not quite sure if it was working or not... :) It might not prompt you for the MLP file if it can find it automatically (if it's the same file name as the AC3 file but with .MLP extension, it might just find it automatically...)

[24673583]

Test Again,I`m success . But i don`t konw if scenarist rebuild it ,The audio Play normal ?

So,I will Continue to experiment

[rik1138]

Well, Scenarist is used to do this in the first place! :) But it should work fine. I've done it with a couple discs of my own from rips. Obviously, building discs with newly created assets (i.e., audio encoded by the Dolby Encoder) works perfectly, but I've never had a problem re-muxing ripped assets either.

I've even gone so far as to actually correct mistakes on discs this way. I have a disc that the TrueHD audio was encoded wrong (center channel on the left, right channel in the center, surrounds reversed... I have no idea what the hell they did...), and the legacy AC3 was only a 2.0 track. So, I used BD ReAuthor to demux the entire disc (HDMV programmed), used eac3to to convert the MLP back into WAV files, figured out which file was really supposed to be playing in each speaker, re-encoded the TrueHD (and made a proper 5.1 AC3 legacy stream), and dropped it back into the project that BD ReAuthor created, and then re-muxed the entire disc. Pain in the ass, but the end results was an exact copy of the original disc, but with correctly encoded audio. (That's a really nice thing about lossless, I didn't lose any audio quality by doing this! :) ). I still can't believe a studio can release a disc that screwed. That just proves that no one ever even bothered to watch the encoded video/audio before sending it to replication... There were actually several other problems I fixed, but the audio was the big one... You couldn't even watch the film.

[24673583]

Hi. rik1138!
I`m success!
The TRUE-HD audio Play normal in ps3. The time being no other problems found.

[jolson]

So, I used BD ReAuthor to demux the entire disc (HDMV programmed), used eac3to to convert the MLP back into WAV files, figured out which file was really supposed to be playing in each speaker, re-encoded the TrueHD (and made a proper 5.1 AC3 legacy stream), and dropped it back into the project that BD ReAuthor created, and then re-muxed the entire disc.
How did you go from WAV to TrueHD?

[dvdboy]

How did you go from WAV to TrueHD?

Dolby Media Producer, I would imagine.

[jolson]

OK, clearly over my budget...

[rik1138]

Well, all you need is Dolby Media Encoder SE... But, yeah, it costs to much for hobbyist use... Hopefully someone will figure out a cheap/free way to encode it someday... I'm sure people are trying.

[jolson]

From reading above I thought testing one thing would anyway be meaningful. A friend has Scenarist, and while he doesn't have Dolby Media Producer it seemed from above that Scenarist could be "fooled". I ripped a .mlp track (my friend doesn't have any DVD-Audio discs) and using eac3to made a corresponding AC3 "companion track" from it. Both played well in Foobar (I have the DVD-Audio plugin), the mlp track showed up as two tracks (one a stereo downmix).

My friend tried the tracks in a Scenarist import preparation tool. Browsed to the .ac3 file, specified Dolby Lossless, was prompted for the .mlp track and then clicked on Execute or something. What he got was "Error confirming MLP synch", and no files. He usually just uses plain AC3 files, which import with no problems.

Should this not be possible, or is it anything I'm doing wrong? I have ripped two .mlp tracks from different DVD-Audio records, the AC3 files is created with ""C:\Program Files\eac3to\eac3to.exe" Test.mlp Test.ac3 -resampleTo48000 -down16 -448"

[rik1138]

Aren't DVD-Audio discs 44.1 kb? Blu-ray files need to be 48 kb... If that's not it, it's probably just the MLP from the DVD-Audio doesn't have the right metadata to be considered Blu-ray Dolby Lossless. I think it's more than just any MLP file, it has to be created specifically for Blu-ray (the MLP format is the same, but I believe there's Blu-ray specific header information in the file...)

Rik

[jolson]

Aren't DVD-Audio discs 44.1 kb? Blu-ray files need to be 48 kb... If that's not it, it's probably just the MLP from the DVD-Audio doesn't have the right metadata to be considered Blu-ray Dolby Lossless. I think it's more than just any MLP file, it has to be created specifically for Blu-ray (the MLP format is the same, but I believe there's Blu-ray specific header information in the file...)

Rik
DVD-Audio discs are usually lossless 24/96 5.1.

Very well may be so that Scenarist wants some extra information in the .mlp file - I know nothing about Scenarist and my friend doesn't usually import mlp so he doesn'y know either.