eac3to - audio conversion tool

[calinb]

Originally Posted by shanghai2004

<snip>
Seems LPCM on HD-DVD does something special as I'm not able to get the LPCM audio track with any program so far.

Yeah--I can't get LPCM to work with eac3to either. Here's an audio-only sample that I made with EVOdemux. eac3to didn't work on the original (video+audio+subs) .evo either.

This sample plays fine with Nero 7 Showtime.

EDIT:

I took drmpeg's idea and used Linux "head" utility to trim all after the first 10MB:

http://www.sendspace.com/file/q1hjgy

Be advised that the first 9 seconds or so is silence.

[madshi]

Originally Posted by Thunderbolt8

another thing, got a question to the conversion of dts-hd ma tracks to flac: the rebuilt .evo with this track only has a size of 1,92GB (16-bit; ~2h30min movie length) for 'the pianist'. the converted flac has a size of 978mb in the end, thats actually reduction of more than 50%. Ive already seen this movie and therefore know that especially later in the movie there are lots of quite scenes with much silence, but could it still be that way that the size shrinks down that much?

It's a bit hard to say. However, DTS MA has the "problem" that there's always a 1.5Mbps core that eats bandwidth/space. And on top of that comes the lossless data. With lossless compression without such a core with a very silent / dialog oriented movie you can easily get lower than 1.5Mbps. I have to say that 1.92GB -> 978MB sounds quite extreme, but I guess it's possible. Does the FLAC file have the correct length and does it seems to play fine? If so, it's most probably correct.

[madshi]

Originally Posted by tebasuna51

Here there are some ideas. The recommended downmix is the Dolby ProLogic II

Thank you!!

[Thunderbolt8]

Originally Posted by madshi

It's a bit hard to say. However, DTS MA has the "problem" that there's always a 1.5Mbps core that eats bandwidth/space. And on top of that comes the lossless data. With lossless compression without such a core with a very silent / dialog oriented movie you can easily get lower than 1.5Mbps. I have to say that 1.92GB -> 978MB sounds quite extreme, but I guess it's possible. Does the FLAC file have the correct length and does it seems to play fine? If so, it's most probably correct.

it has the correct length and also play fine, so then I guess im lucky :P

[rickardk]

Originally Posted by drmpeg

I have a few simple command line tools for cutting files to create samples.

http://www.w6rz.net/head.zip

Creates a file from the first x bytes of a file.

head <infile> <outfile> <length>

head movie.evo clip.evo 50000000

************************************************

http://www.w6rz.net/tail.zip

Creates a file from the last x bytes of a file.

tail <infile> <outfile> <length>

tail movie.evo clip.evo 50000000

************************************************

http://www.w6rz.net/clip.zip

Creates a file of x bytes starting at y bytes into the file.

clip <infile> <outfile> <start offset> <length>

clip movie.evo clip.evo 1000000000 50000000

Ron

Thanks!
Samples of Godfellas and Kingdom of Heaven are coming today, not enough time for this yestersday.


Thunderbolt8
Ripping The Pianist right now. I will report filesize of flac when done. You used Sonic CinePlayer Decoder v4.3.0 right?

[Thunderbolt8]

I used eac3to :P
i installed all these codecs back then when they were still needed for eac3to, dont know if they are also needed with the new versions. I just used the normal command line without any switch.

[nautilus7]

For dts (all kinds) sonic is the default-best quality decoder. So... if you have it installed, you used it.

You can type:

eac3to -test

to test the decoders/filters/splitters.

[rickardk]

Originally Posted by Thunderbolt8

it has the correct length and also play fine, so then I guess im lucky :P

The DTS-HD MA track from The Pianist is 1.87 GB (EU release). The FLAC created with eac3to is 978 MB (1*025*558*426 byte). Length 2h28m.

[Thunderbolt8]

almost same for me, length of mine is 1.025.559.456 Bytes :P

[calinb]

10MB LPCM audio sample:

http://www.sendspace.com/file/q1hjgy

I trimmed all but the start of the large sample with the Linux "head" utility. This sample plays in Nero Showtime but eac3to fails to produce a playable file, as also reported by shanghai2004. The first 9 seconds is silence.

[Chupacabras]

Originally Posted by madshi

Possibly the DTS file is beginning in the middle of a DTS frame. eac3to only accepts DTS files which begin with a full DTS frame. Please try running the DTS file through delaycut. Afterwards eac3to should be able to handle the file just fine.

Thanks for advice.
delaycut processed source file, but showed many errors:

...
Time 00:00:02.110; Frame#= 199. Unsynchronized frame...SKIPPED  68 bytes. Found new synch word
Time 00:00:02.132; Frame#= 201. Unsynchronized frame...SKIPPED  68 bytes. Found new synch word
Too Many Errors. Stop Logging.
Number of written frames = 112737
Number of Errors= 112743

Final (fixed) file is half the original size (original is 571MB, fixed is 216MB). Is that normal?

Then I tryed eac3to with this fixed audio, it wrote this:

X:\eac3to>eac3to.exe "X:\audio_fixed.dts"  "X:\audio_fixed.ac3"  -448  -sonic
DTS, 5.1 channels, 0:20:07, 24 bits, 1536kbit/s, 48khz
Decoding with DirectShow (Sonic Audio Decoder)...
The DirectShow audio decoder didn't accept the input stream.

[nautilus7]

Your dts file is f@cked up. Try demuxing the file again, maybe using a different program.

[Chupacabras]

I tryed these:
mencoder
projectx (demuxes only video)
dgindex (throws error)
tsremux (throws error)

I don't know what else could I try...
(unfortunately I don't have original disc, file was downloaded)

[nautilus7]

I am not sure, but i think xport can demux .ts files. Try it.

[TripleH]

A little off-topic - something strange about Nero Audio Decoder 2 and Blu-ray Disc Dolby TrueHD audio tracks.

I built the following graph with graphedit:

File source (BD m2ts file) ---> Nero Splitter ---> Nero Audio Decoder 2 ---> Renderer.

The graph plays fine, but when I go to the Nero Audio Decoder 2 settings it reports that the bitrate is 640kbps (so I guess it basically gets the DD core).

Is this a mistake or is it really plays the DD core instead of TrueHD audio ?

Thanks.

Edit: I think the problem is even worse.

I took a look at two BD movies with Dolby TrueHD track using TSRemux and it recognized all of the audio streams, including the TrueHD track.

But in Nero splitter and Haali it only shows 4 audio tracks, where there are five actually, so this makes me think that the problem is the splitter.

Which splitter can recognize Dolby TrueHD tracks ?

[nautilus7]

Without really know how to help you... What do want to do?

[Thunderbolt8]

Originally Posted by nautilus7

I am not sure, but i think xport can demux .ts files. Try it.

yes, it definately can. just leave out the -h option, which is for blu-ray .m2ts files

[madshi]

Originally Posted by calinb

10MB LPCM audio sample:

http://www.sendspace.com/file/q1hjgy

I trimmed all but the start of the large sample with the Linux "head" utility. This sample plays in Nero Showtime but eac3to fails to produce a playable file, as also reported by shanghai2004. The first 9 seconds is silence.

Thanks. LPCM demuxing will be fixed in the next build. I found out that the LPCM headers differ between EVO and VOB. That's why demuxing didn't work: The current eac3to version expects VOB LPCM headers! Doh...

[madshi]

Originally Posted by Chupacabras

Thanks for advice.
delaycut processed source file, but showed many errors:

Final (fixed) file is half the original size (original is 571MB, fixed is 216MB). Is that normal?

Ah well, delaycut probably just removed all the DTS-HD information. Delaycut doesn't fully support DTS-HD. But still, decoding should work now.

Originally Posted by Chupacabras

Then I tryed eac3to with this fixed audio, it wrote this:

X:\eac3to>eac3to.exe "X:\audio_fixed.dts"  "X:\audio_fixed.ac3"  -448  -sonic
DTS, 5.1 channels, 0:20:07, 24 bits, 1536kbit/s, 48khz
Decoding with DirectShow (Sonic Audio Decoder)...
The DirectShow audio decoder didn't accept the input stream.

Try "eac3to -test" to check whether the Sonic decoder is working correctly on your PC.

[madshi]

Originally Posted by Chupacabras

unfortunately I don't have original disc, file was downloaded

In that case I can't help you further since Doom9 is not about pirating but about free rights with the content you legally own. See forum rule 6.