SVCD with 5.1 audio

[psoares]

Hi,

I saw on the Audio Encoding forum, that is allready possible to create a mpeg-mc audio file with 5.1 for SVCD (final testing stage).

Do you plan to have this functionality included in the nest version of dvd2svcd ? it would be GGRREEAATT !!!!

Meanwhile, how can i acheive this ?


:cool:
Pedro Soares

[waldok]

hi,

Just for information, your standalone player must support MPEG2 multichannel (slightly different from DD 5.1) if you want to use SVCD with 6 channel sound.
I got a test SVCD file including multichannel sound from a site (sorry I can't remember where for the moment) an it doesn't work on my standalone.

Thought you might be interested in this info (maybe you knew already).

Waldok:cool:

[psoares]

Thanks,

Can you please give me the url of the site where you downloaded the SVCD with 6 channels file.

I have to test it on my player MUSTEK DVD V300

[Mozart]

Hi,

mp2 means "mpeg1 layer 2" audio, while such 5.1 audio for SVCD is mpeg2. AFAIK, it is too difficult to make such audio file, which involves the use of some linux tools. I don't know if BeSweet can make such mpa (mpa, not mp2) file. Even if the SVCD has 5.1 mpeg2 audio, most of built-in decoders cannot send such audio "as is" using the digital audio output. There are more informations about this issue here (http://208.189.26.162/vbb/showthread.php?threadid=9113). There you can find also some audio track samples. Download them and mux with a video file using IAuthor.

[HarlockBCN]

Not only tools under linux...
Take a look at this link:

http://www.licensing.philips.com/ordering/soft/documents343.html

There are a lot of tools from philips to encode multichannel-mpeg streams under Windows/MSDOS.
(if you go to the bottom of the page you will find a
link to a .zip file with these tools).

The MPEG 5.1 multichannel works on my dvd philips-951.

[Mozart]

Thank you for the info. Are you doing ac3->mpa conversion with these tools? How?

[psoares]

HarlockBCN

the link that you posted :

http://www.licensing.philips.com/or...cuments343.html

doesn't work.

Do you have this software or know where can i download it ?

thanks !

[cHAs_ChaS]

harlockBCN puedes dejar tu mail para q pueda hablar contigo del philips 951 ???


sorry guys i know the language here is english

[HarlockBCN]

It works!,
Click on the link, not copy it dragging your mouse...because the forum page not show it totally..ok? :)

(i'm spanish i hope you understand my explanation ;))

The link:

http://www.licensing.philips.com/ordering/soft/documents343.html


Chas Chas, you can mail me at harlockBcn@hotmail.com, saludos!

[dvd2svcd]

BTW, I am working on this issue. I hope I have it ready in a beta stage next version.

[IGuaNAdoN]

You RULE! :)

Keep up the GREAT work!


peace,

IgGy :D

[dvd2svcd]

:( Damn, it seems that it is only I-Author that can multiplex a mpeg 5.1 audio and video properly.

[waldok]

Hmmmm....What about image quality loss due to "enormous" amount of audio data related to 5.1 audio ? I mean, it will probably be a choice to make between keeping a small number of CDs for one movie (and thus lowering the video bitrate maybe too much) and preserving great picture quality (thus increasing the number of Cds for one movie) considering there will be 6 audio channels to encode instead of 2.

For the moment, stereo sound on SVCD is OK for me since I use an Onkyo receiver that applies dolby pro logic 2 algorithms, thus recreating some kind of artificial multichannel sound. This really works well on SVCDs produced with DVD2SVCD.
I'm also used to trying to fit one movie on 2 CDs only (provided that the movie has a "reasonable" length.

Did anyone do the maths about it so to foresee the impact on total bitrate and the number of Cs required (let's say at SVCD max video bitrate) when you have 6 audio channels encoded ? (I'm too lazy).

Thanks, just curious

Waldok:cool:

[Doom9]

length_of_movie*(384-2ch_bitrate)/8 = additional size in KB.

but... the fact remains that we have 2 verified philips players and nothing more.. if I were you I'd rather put my money into DVD-R.. there you don't even have to re-encode the audio and eventually with derrow's and robshot's help you'll be making DVDs on DVD-R that rival DVD quality (some say the difference is not visible... I still haven't verified that so I prefer not to comment on this issue at this point)

[psoares]

DVD2SVCD

Any progress in this subject ?

you could check this url

http://www.stud.uni-siegen.de/sven.koelsch/mpeg2mc/

but it involves the use of a linux system.

Did you manage to mux the audio and video files correctly ?


thanks

;)

[dvd2svcd]

I have put it on hold for the time being.

[DSPguru]

BeSweet v1.2b2 (http://dspguru.notrace.dk/BeSweetv1.2b2.zip)
supports AIFF output, so the AC3->Mpeg2Multichannel transcoding process should be shorter than ever.
Further more, i might create a Mpeg2Multichannel encoder dll and offer direct AC3->M2MC in future versions of BeSweet. (depends of the interest this feature raises).

[Mozart]

Originally posted by dvd2svcd
:( Damn, it seems that it is only I-Author that can multiplex a mpeg 5.1 audio and video properly.

did you had had tested mplex (which comes with mjpegtools)? Is this the reason of Iauthor support as default in the new version, instead of a hidden support?

[dvd2svcd]

Mozart, there's something you have totally misunderstood. I-Author is NOT, I repeat NOT the default muxer/authoring program! VCDXBuilder is still the default.

[Mozart]

Could you please read my question more carefully? I'm talking about Iauthor support, which is enabled by default in build 3. I DO realize that it is not selected by default. However, it is not hidden, as it was in build 1 and version 1.0.5. Then, I am not misunderstanding anything.
When a newbie see that DVD2SVCD has Iauthor support, he/she starts to try to use it. He also send PM questions about where to find it. He starts to complaining because the audio is out of sync, there are error messages, the cif file is missing, etc.
I had think that that game was over...

[beergod]

Can anyone tell me how to use mpeg2 mc audio file with DVD2SVCD ?
Example if I got an mp2 MC audio file made from AC3->AIFF->MC MPEG2.
How can I make use of dvd2svcd ?

Thanks

[dvd2svcd]

Look again at what you asked me:


Is this the reason of Iauthor support as default in the new version, instead of a hidden support?


So I have not misunderstood your questions. This is the second time you claim it to be default and it is not, it is only enabled, that's it. Besides I wonder why you have so much against it being enabled again.

[Mozart]

So, if a software has support for something, this means that this something is used, instead of just enabled... Well... MSWord has RTF support by default, but this doesn't mean that such format is USED by default... I do know that my English is awful, but this doesn't mean that I shoud know that
support_by_default==use_by_default:o

About I-Author: I hate PM about warez, followed by another PM asking for how to install the patched file, follwed by another complaining that "it doesn't work".;)

[dvd2svcd]

Ok, no biggie, I will file it under Language Specific misunderstandings.

For me:
default = (After installation of DVD2SVCD it will use I-Author)
enabled = (After installation of DVD2SVCD the user can select I-Author)


But, the reason I activated I-Author again is because I got some mails where the user said that his player was only able to show subs when it was muxed with I-Author, and since my aim is to accomodate as many users as possible, I re-enabled it. Besides, in the old days it wasn't a big warez issue concerning I-Author.

[beergod]

DVD2SVCD,
How and what commands to do use to run besweet ? Can I direct it to a run another batch file so that the audio output from besweet can be subsequently reencoded into MC MPEG, and DVD2SVCD can pick up from there and do the rest ?

Sometime ago, people got excited about encoding MC MPEG into SVCD. I had the source code for doing it, and just haven't had the time to integrate into something that takes wav input ... I may turn it into a DLL so that besweet can use it. No promise ...

For now, the best way is to do it via a bat file.

What do you think ?

[dvd2svcd]

You could make a Batch file looking like this:

--------------------------------

Rem X:\ENCODERPATH = Where you have the mpeg5.1 encoder
Rem You have you use CD X:\ENCODERPATH otherwise Encoder.exe will fail

CD X:\ENCODERPATH

"X:\YOURPATH\Besweet.exe" -core( -input %3 -output X:\YOURPATH\temp.aiff -logfile %7 -6chaiff ) -azid( -L -3db -c normal ) -ota( -g max ) -ssrc( --rate 44100 )

Encoder.exe -m s -n d -o -L -b 128 X:\YOURPATH\temp.aiff X:\YOURPATH\temp

move X:\YOURPATH\temp.mpg %5

---------------------------------

The encoder can be downloaded here:
http://rilanparty.com/vbb/attachment.php?s=&postid=50715

However, the above batchfile will not take any possible audio delays in consideration. And you must change "-b 128" to the right bitrate you want to use. And you must manually use I-Author muxer to multiplex the audio and video.

[beergrave]

Because I-Author is the only one, which can handle sub-titles correct (and 5.1 sound).


Greetings

BeerGrave

[dvd2svcd]

Not true! CVD subtitles is not SVCD specified, hence it might handle CVD subtitles properly, but that doesn't mean that it's the only program that handles subs properly. Just because your player only plays I-Author muxed streams, doesn't mean anything. This is probably more due to your standalone player.

[beergod]

I have certainly tried using TMPGEnc to mux 5.1 MPEG and Video files, and it works. I have tested the SVCD on 2 DVD players.

[beergrave]

@DVD2SVCD

May be it is a problem of my standalone Player (Chinese backyard one), but when subtitles made with i-author works on all players, why should we use another program?

Greetings

BeerGrave

[dvd2svcd]

There's something you have totally misunderstood! Not all players will play CVD subtitles. For instance I have a player here (a B&O tv with built-in dvd), it will only show subs when using SVCD subtitles (using submux). So please, stop being obstinate about this issue.

[beergrave]

Okay!


Greetings

BeerGrave

[DSPguru]

any1 tried to encode mpeg2multichannel track with the new BeSweet switch "-6chaiff" ?

you can find the phillips encoder here :
http://www.licensing.philips.com/ordering/soft/documents343.html

Originally posted by beergod
I have certainly tried using TMPGEnc to mux 5.1 MPEG and Video files, and it works. I have tested the SVCD on 2 DVD players. since dvd2svcd is now working on tmpgenc support, i guess that dvd2svcd with 5.1mpeg audio is only a matter of time :D

[CrazyPortuguese]

I'd love to have 5.1 audio too :)
Of course it would cost a lot in video quality but it would be an intersting function :)
Thanks DVD2SVCD for the great job :)

[Clixo]

it would be an superb add if it would be possible but as someone told me " its ready when its ready " so lets not push the author to make it the thing that we can do is to is show our support here :
http://order.kagi.com/cgi-bin/r1.cgi?8XD&&

[Spawn]

5.1 audio on SVCD would be great, but its essentially pointless since practically no receivers sold for the last few years support MPEG2-MC. Aside from some Philips dvd players that have built in decoders, its a completely dead/obselete format.

My opinion,

-SPaWN-

[nuno]

Hi !
My Sony 525d decodes mpeg multichannel, but only mpeg 1.