How to create a SVCD with mpeg2 5.1 sound from avi + ac3

[Saito]

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]

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]

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]

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]

sorry, I'm sleeping...

merge your MP2 files with copy /b

[surferjoe]

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]

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]

OK Hypercube, joining the avi´s worked great but what I´d 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]

I am currently on this work.
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]

hey hypercube, do u plan to support multichannel wavs on a future version?

[kwantum]

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]

@saito
I can do that. let me one or two week.
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.

[Saito]

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]

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]

You know what ? My compressor/Expander is working, now. 8)
suddenly yesterday, in night, I found the solution.
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

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

[surferjoe]

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]

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]

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

[talktwo]

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]

talktwo, don't say multiplex, say transcode. multiplexing is not
related to what you say.

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.

[talktwo]

thank you for your prompt response...just ooooooooone more question if you don't mind 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

thanks for your help

[hypercube]

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]

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 )..... 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

MPEG )I( Empowered

[hypercube]

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]

I see u r working on my idea about multichannel wavs...thanks and keep up the good work! U the best!!!

[hypercube]

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]

a beta is better than nothing

[genuinefafa]

I love HyperCube Transcoder....

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

Regards!

[tim]

can u just make the ac3 in besweet and then make it a wav use sonic foundry soft encode?

[hypercube]

definitively not.
sonic foundry soft encode is not an MPEG Multichannel encoder.
it is an AC3 ENCODER/DECODER.

you cannot use AC3 in SVCD, but you can use MPEG Multichannel
in SVCD. This is the only solution to produce 5.1 SVCD