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How to create a SVCD with mpeg2 5.1 sound from avi + ac3
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Saito
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Joined: 13 Oct 2002
Post Posted: Oct 19, 2002 09:24 Posts Comp View users profile Send private message Reply with quote
yeah I think I kinda knew that. I dunno why I asked...maybe the Prologic II name confused me.

Anyway, your program doesnt seem to like ac3s made with SoftEncode even if they are 48khz, and if I use ac3fix I get a messed up ac3 and a silent mp2.

btw, can the pc playback a 5.1 mp2?

hypercube
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Joined: 26 Sep 2002
Location: France
Post Posted: Oct 21, 2002 15:52 Posts Comp View users profile Send private message Reply with quote
do you use hypercube encoder 1.1 ?
you can read in the window the exact type for AC3 file format.

AC3 input must be:
"(CM) 48000Hz 3/2 L,C,R,SL,SR With LFE"

surferjoe
Member


Joined: 12 Jun 2002
Post Posted: Oct 22, 2002 13:51 Posts View users profile Send private message Reply with quote
Hypercube:

when encoding a 2 part avi with ac3 sound to svcd with mpeg2 sound TMPEG gives me allways an error when trying to join parts of these 2 files for audio not beeing compatible.

Anyy suggestions??

hypercube
Member


Joined: 26 Sep 2002
Location: France
Post Posted: Oct 22, 2002 23:41 Posts Comp View users profile Send private message Reply with quote
Use VirtualDub to merge AVI. Then, use Frameserver to encode
video with tmpgenc.

merge your AC3 files with a simple:

copy /b file1.ac3+file2.ac3 final.ac3

then encode with hypercube transcoder.

hypercube
Member


Joined: 26 Sep 2002
Location: France
Post Posted: Oct 22, 2002 23:49 Posts Comp View users profile Send private message Reply with quote
sorry, I'm sleeping... smile.gif

merge your MP2 files with copy /b

surferjoe
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Joined: 12 Jun 2002
Post Posted: Oct 23, 2002 13:09 Posts View users profile Send private message Reply with quote
Hypercube, I did it like this now:

Megred the avi +ac3 using direct stream copy on both audio and video in TMPEG and started wirking with the whole thing.
Seems to work so far

Saito
Member


Joined: 13 Oct 2002
Post Posted: Oct 23, 2002 15:52 Posts Comp View users profile Send private message Reply with quote
Quote:
do you use hypercube encoder 1.1 ?
you can read in the window the exact type for AC3 file format.

AC3 input must be:
"(CM) 48000Hz 3/2 L,C,R,SL,SR With LFE"



Ok
-I made an ac3 with Softencode. It was 48khz 3/2 with LFE (5.1)
-Encoding this ac3 with Hypercube just gives me a 10seconds mp2
-If I try "fixing" the ac3 with ac3fix it ends up messed up

So maybe your program doesnt support Softencode ac3s

surferjoe
Member


Joined: 12 Jun 2002
Post Posted: Oct 26, 2002 15:36 Posts View users profile Send private message Reply with quote
OK Hypercube, joining the aviŽs worked great but what IŽd like to see is the chance to enhance the audio volume in the final mp2 file encoded with your transcoder.

sound volume is really low. Nay chance you can implement that in the next release?????

hypercube
Member


Joined: 26 Sep 2002
Location: France
Post Posted: Oct 27, 2002 16:57 Posts Comp View users profile Send private message Reply with quote
I am currently on this work. biggrin.gif
batch encoding is done.
now I'm making Peak Normalisaton.

do you know that chanching final Gain will
produce saturation if you don't use normalisation ?

the best will be a compressor/Expander. But I don't have
any information to implement such thing.

(may be it is possible with sonicflow library source code, but
this will take a long time...)

Saito
Member


Joined: 13 Oct 2002
Post Posted: Oct 27, 2002 17:27 Posts Comp View users profile Send private message Reply with quote
hey hypercube, do u plan to support multichannel wavs on a future version?

kwantum
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Joined: 14 Apr 2001
Post Posted: Oct 27, 2002 18:16 Posts View users profile Send private message Reply with quote
according to http://members.lycos.co.uk/hypercube/html/database_results.php
the Pioneer DV-343 is multichannel compliant. I was hoping someone could tell me how; i did the test and only got front left and right and center speakers.

hypercube
Member


Joined: 26 Sep 2002
Location: France
Post Posted: Oct 28, 2002 03:00 Posts Comp View users profile Send private message Reply with quote
@saito
I can do that. let me one or two week. wink.gif
do you know a simple way to build such WAV files ?
with Softencode, isn't it ?

@kwantum
sorry, I don't know how to help you. sad.gif

Saito
Member


Joined: 13 Oct 2002
Post Posted: Oct 28, 2002 21:48 Posts Comp View users profile Send private message Reply with quote
I think Softencode and Surcode DTS can do mutichannel wavs, and I think Besweet can encode multichannel wavs to multichannel ac3s but Im not sure

hypercube
Member


Joined: 26 Sep 2002
Location: France
Post Posted: Oct 29, 2002 03:08 Posts Comp View users profile Send private message Reply with quote
about audio volume in hypercube transcoder:

What I have done:

1. search peak level in all channels (in dB)
2. select max level for each channels in dB
3. select normalisation method:
- (C) (L R) (LS RS) (LFE)
- (C) (L R LS RS) (LFE)
- (C L R LS RS) (LFE)

I can make another stuff:

increase audio volume with x dB and clip samples in case of saturation.
clipping is a stuff like this:
if sample>max then sample = max

I think only normalization can produce results without saturation (but result is not very loud in most of cases)

the question is: what do you want ?

hypercube
Member


Joined: 26 Sep 2002
Location: France
Post Posted: Oct 31, 2002 02:52 Posts Comp View users profile Send private message Reply with quote
You know what ? My compressor/Expander is working, now. cool.gif
suddenly yesterday, in night, I found the solution. ohmy.gif
My algorithm was wrong. My new idea was the good one.
Now the result sounds really good.
I made some test with cooledit pro 2 dynamic range processor, to
compare its results with my dynamic range processor.
results are very very close.

You want kick ass sound ? You will have biggrin.gif

My plan:
look at the cooledit pro 2 dynamic range processor graph.
Imagine this stuff on each channels in Hypercube Transcoder...

surferjoe
Member


Joined: 12 Jun 2002
Post Posted: Nov 02, 2002 12:02 Posts View users profile Send private message Reply with quote
Hi Hypercube,

what you last mentioned sounds quite good,

Please give us the opportunity to enhace audio volume AND normalize as well. I found out that music volume is allways good while speach is mostly very low volume

Thx for your help

hypercube
Member


Joined: 26 Sep 2002
Location: France
Post Posted: Nov 03, 2002 14:40 Posts Comp View users profile Send private message Reply with quote
this will be done.
but I am sorry, I don't have a lot of time to work
on hypercube transcoder. One thing is to make
a dynamic range processor, another thing is to
implement it in hypercube transcoder.
You can expect a 2.0 release in december.
(may be before....)

talktwo
Member


Joined: 10 Oct 2002
Post Posted: Nov 04, 2002 18:36 Posts Comp View users profile Send private message Reply with quote
hmmmm Hypercube...so what you're saying is that i CAN multiplex *.ac3 with a *.m2v and it WILL have dolby on my COMPUTER....but not on my standalone DVD player right?? Let me know...cuz I did it...and it reads out as dobly compliant in powerDVD

As well, how can I be sure that the *.mp2 file that I created is 5.1?? Well other than obviously playing it in a player....are there any programs out there that can tell me this info??

and btw, I'm loving your hypercube 1.1 program...it does a MUCH better job and better quality of the audio than does Rempeg ... in half the time too!!!! Looking forward to version 2.0

Last edited by talktwo on Nov 04, 2002 19:01, edited 1 time in total
talktwo
Member


Joined: 10 Oct 2002
Post Posted: Nov 04, 2002 18:59 Posts Comp View users profile Send private message Reply with quote
Quote:

I think Softencode and Surcode DTS can do mutichannel wavs, and I think Besweet can encode multichannel wavs to multichannel ac3s but Im not sure


I believe Besweet can encode ac3's to multichannel wavs...but doesn't that deteriorate the audio quality??

hypercube
Member


Joined: 26 Sep 2002
Location: France
Post Posted: Nov 05, 2002 03:12 Posts Comp View users profile Send private message Reply with quote
talktwo, don't say multiplex, say transcode. multiplexing is not
related to what you say. wink.gif

Here some info:

- dolby is NOT Mpeg multichannel. so you can be dolby compliant but not
MPEG Multichannel compliant.
- some standalone DVD player CAN decode MPEG Multichannel.
(consult the list on my website.)
- I don't know if PowerDVD or WinDVD can decode Mpeg Multichannel
- I don't know if there is a soft around here which can detect Mutlichannel Part in MPEG 2 audio stream.

but, in all cases, a MPEG Multichannel stream can be played by
any MPEG audio player. You will hear a downmix in stereo.
This is true for standlone DVD player or software DVD player.

thanks for your support. biggrin.gif

talktwo
Member


Joined: 10 Oct 2002
Post Posted: Nov 05, 2002 08:23 Posts Comp View users profile Send private message Reply with quote
thank you for your prompt response...just ooooooooone more question if you don't mind smile.gif I followed your instructions on your page to the dime, and when I load the *.mpg file into WinDVD, it says that the audio is only 2 channel...is this normal? I don't want to burn it onto CD till I get this correct wink.gif

thanks for your help

hypercube
Member


Joined: 26 Sep 2002
Location: France
Post Posted: Nov 05, 2002 09:24 Posts Comp View users profile Send private message Reply with quote
this is normal. There is some info about this stuff on my website.
MPEG multichannel is an extension of MPEG. there is some
extra bytes in the stream for multichannel decoding. The
stream can be played in stereo. this is why WinDVD think it is
Stereo MPEG stream...

esmerelda1983
Member


Joined: 02 Aug 2002
Location: Australia
Post Posted: Nov 05, 2002 20:18 Posts Comp View users profile Send private message Reply with quote
i have been watching this topic since i first posted....and yesterday i decided to go on over to hypercube's web page and have a look at the info there.......well i seen the logo for MPEG multichannel and it got me thinking.....i have seen that before......
then a few hours later i remembered.....in Australia......my region 4 copy of the crow (brandon lee) on dvd has MPEG multichannel and dolby 2CH.

i cannot hear the MPEG through my Dolby Digital decoder.......unless i switch the settings on my dvd player to output digital MPEG as PCM.....not Bitstream(like i have for dolby sound, i have got DTS off coz my decoder dont support it sad.gif )..... so i would be correct in saying that my dvd player can support MPEG multichannel since if i output it as bitstream into a compatable decoder i would get 5.1 sound from my dvd movie???? therefore if i also make an svcd with 5.1 MPEG then i could still output it as PCM untill i upgrade my decoder in the future to support DTS and MPEG mulitchannel????

keep up the good work, a newby like me can learn alot from others mistakes(watching other posts) and new and easy ways to do things from people making guides like this 1 laugh.gif

MPEG )I( Empowered biggrin.gif
_________________
Death, is only the begining -- Imhotep

hypercube
Member


Joined: 26 Sep 2002
Location: France
Post Posted: Nov 13, 2002 04:32 Posts Comp View users profile Send private message Reply with quote
some news about hypercube.

- Channels normalisation is done
- Dynamic range processing is done (95%)
- Batch encoding is done

I'm working on multichannel PCM WAV support as input format.

Saito
Member


Joined: 13 Oct 2002
Post Posted: Dec 13, 2002 23:10 Posts Comp View users profile Send private message Reply with quote
I see u r working on my idea about multichannel wavs...thanks and keep up the good work! U the best!!!

hypercube
Member


Joined: 26 Sep 2002
Location: France
Post Posted: Dec 14, 2002 03:37 Posts Comp View users profile Send private message Reply with quote
I am going to publish the 2.0 BETA as soon as possible.
why beta ? because of resync is not perfect for instance
and I have other stuff to do.

Saito
Member


Joined: 13 Oct 2002
Post Posted: Jan 02, 2003 21:30 Posts Comp View users profile Send private message Reply with quote
a beta is better than nothing

genuinefafa
Member


Joined: 09 Jan 2003
Location: Buenos Aires, Argentina
Post Posted: Jan 09, 2003 17:37 Posts Comp View users profile Send private message Reply with quote
I love HyperCube Transcoder....

I'll give you details of my test.
I am using a Pioneer DVD-343 (US Version)

Regards!
_________________
Life is short... Enjoy it (Buy an X-Box wink.gif )

tim
Member


Joined: 16 Mar 2002