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How to create a SVCD with mpeg2 5.1 sound from avi + ac3
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theholyspirit
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Joined: 01 Oct 2002
Post Posted: Oct 01, 2002 12:45 Posts View users profile Send private message Reply with quote
hmm mystic?

iam usin win2k sp3

the popup comes up but as fast as it comes itīs away, so no chance to read sth



thx for ur help

surferjoe
Member


Joined: 12 Jun 2002
Post Posted: Oct 01, 2002 16:56 Posts View users profile Send private message Reply with quote
theholyspirit:

Have you tried using DVD2SVCD instead of the dubs to convert the avi to svcd?

It takes a bit more time but you should give it a try.

Another guess would be to try Graphedit to extract the audiostream. Did you try that?

swoop
Member


Joined: 15 Jul 2002
Location: The Netherlands
Post Posted: Oct 02, 2002 03:58 Posts Comp View users profile Send private message Reply with quote
Yo, HyperCube!
Your hypercube is cool, but maybe you could add a feature that will inform about bitrate of created audiofile (according to number of channels etc.). It will be usefull when seting encoding bitrate of video trying to fit onto CD. cool.gif
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theholyspirit
Member


Joined: 01 Oct 2002
Post Posted: Oct 02, 2002 19:23 Posts View users profile Send private message Reply with quote
surferjoe wrote:
theholyspirit:

Have you tried using DVD2SVCD instead of the dubs to convert the avi to svcd?

It takes a bit more time but you should give it a try.

Another guess would be to try Graphedit to extract the audiostream. Did you try that?


ok, GraphEdit seems to work, it is right now producing the wav file

thx

HJRodrigo
Member


Joined: 18 Sep 2002
Post Posted: Oct 04, 2002 14:10 Posts View users profile Send private message Reply with quote
I made a small intro that can be used with SVCD's that use MPEG multichannel sound. Look on my website.
http://members.cox.net/hjrodrigo/index.html

HJRodrigo
Member


Joined: 18 Sep 2002
Post Posted: Oct 04, 2002 19:23 Posts View users profile Send private message Reply with quote
Hypercube transcoder doesn't appear to work with all .ac3 files. I have encoded several ac3 files with various settings and they are said to be unsupported. What kind of ac3 files can your program handle or cannot handle?

Valdi
Member


Joined: 05 Oct 2002
Post Posted: Oct 05, 2002 00:47 Posts Comp View users profile Send private message Reply with quote
I was trying to load an AVI to VirtualDub and got this message: "Could not loacate decompressor for format 'DX50' (unknown).

I can play the movie with both sound and video.

Any idea how can I make it work?

Waldemar

Info about the movie I am working on

Video Format.........: Divx 5.02pro with AC3 Audio
Video Bitrate........: 207
Codec URL............: www.divx.com
Resolution...........: 640 X 480
Color................: 24
FPS..................: 29.970
Source...............: DVD 4x3
Original Format......: NTSC
Genre................: Family

This
Member


Joined: 23 Jan 2002
Post Posted: Oct 05, 2002 07:32 Posts View users profile Send private message Reply with quote
Is it possible to make all this with a xvcd?
My DVD player does not accept SVCDs, but I would love to get the "real" surround feeling in my movies...

This

surferjoe
Member


Joined: 12 Jun 2002
Post Posted: Oct 05, 2002 13:12 Posts View users profile Send private message Reply with quote
To this:

as far as I know xvcd is mpeg1 while svcd is mpeg2

So I donīt think itīs possible to mix mpeg2 sound with mpeg1 video

If anyone knows better, Iīm willing to learn.

To Hypercube:

Thx for your great tool. havenīt had any problems with it since I started using it.
If you could add a feature to bring up the volume this would be killer

m3ta
Member


Joined: 05 Oct 2002
Post Posted: Oct 05, 2002 13:28 Posts View users profile Send private message Reply with quote
surferjoe wrote:

make shure not to use a to high bitrate as SVCD can only use a total max bitrate just over 2700 kbits/sec so do the math:
2700 - 384 (soundfile) = 2300 kbits/sec


wrong. as u can easily see browsing the dvd-players list, some allow mpeg-2 up to 7000k/s. there is no "max 2700 on svcd" limit.

surferjoe
Member


Joined: 12 Jun 2002
Post Posted: Oct 05, 2002 15:47 Posts View users profile Send private message Reply with quote
mt3a:

This max bitrate limit is what DVD2SVCD tells you when you sett the bitrate settings so I thought that this limit is THE standard.

Thx for your tip on the higher bitrate but is there a visible effect between 2300 bits/s and 7000 bits/s on a SVCD?
My svcd encoded with 2300 b/s are way sharper than even any VCD, even sharper than the standard TV transmission

Fu$ion
Member


Joined: 06 Oct 2002
Location: UK
Post Posted: Oct 06, 2002 16:23 Posts Comp View users profile Send private message Reply with quote
I am trying to make the test svcd from Hypercubes page ... TMPGEnc won't let me change the audio from 224 to 384kbps ???? The option is grayed out.
Using version 2.52.34.129 any ideas ??

cry.gif

Baldrick
Administrator


Joined: 09 Aug 2000
Location: Sweden
Post Posted: Oct 06, 2002 16:34 Posts Comp View users profile Send private message Reply with quote
fusion: load the unlock template after you loaded the svcd template, you find it in the tmpgenc template folder under extra.

Fu$ion
Member


Joined: 06 Oct 2002
Location: UK
Post Posted: Oct 06, 2002 16:37 Posts Comp View users profile Send private message Reply with quote
Nice one !!

Thanx

HJRodrigo
Member


Joined: 18 Sep 2002
Post Posted: Oct 06, 2002 20:38 Posts View users profile Send private message Reply with quote
Okay this is weird, all ac3 files made by Sonic Foundry Soft Encode are said to be unsupported format by hypercube. Any body else have this problem?

kitty
Was A Moderator


Joined: 15 Jun 2001
Location: US
Post Posted: Oct 06, 2002 20:59 Posts Comp View users profile Send private message Reply with quote
On many DVD players the SVCD max bitrate is much lower than the DVD MPEG2 bitrate.

I wish I was a firmware coder - I'd eliminate these artificial barriers. But I don't know Chinese or Dutch...
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hypercube
Member


Joined: 26 Sep 2002
Location: France
Post Posted: Oct 07, 2002 15:08 Posts Comp View users profile Send private message Reply with quote
Hi biggrin.gif

A little world about hypercube: read the manual, input format is
ONLY AC3 at 48000Hz with 3/2 + LFE configuration.

with 1.1 version, after the AC3 file is rejected, you can see its format
in the window.

to m3ta:
>wrong. as u can easily see browsing the dvd-players list, some allow >mpeg-2 up to 7000k/s. there is no "max 2700 on svcd" limit.
yes but such SVCD are not standard, isn't it ?

Treebeard
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Joined: 28 Aug 2002
Location: 127.0.0.1
Post Posted: Oct 07, 2002 15:14 Posts Comp View users profile Send private message Reply with quote
m3ta wrote:
surferjoe wrote:

make shure not to use a to high bitrate as SVCD can only use a total max bitrate just over 2700 kbits/sec so do the math:
2700 - 384 (soundfile) = 2300 kbits/sec


wrong. as u can easily see browsing the dvd-players list, some allow mpeg-2 up to 7000k/s. there is no "max 2700 on svcd" limit.



2700 is a svcd max, going above that is considered XSVCD.

hypercube
Member


Joined: 26 Sep 2002
Location: France
Post Posted: Oct 07, 2002 15:16 Posts Comp View users profile Send private message Reply with quote
right.

surferjoe
Member


Joined: 12 Jun 2002
Post Posted: Oct 08, 2002 10:12 Posts View users profile Send private message Reply with quote
just a question:

Is converting the avi file with the mpeg2 384 kbits/sec audio file in the main window of TMPEG give you the same result as just encoding the video file and adding the audio later with the mpeg-tools?

To Hypercube: If you could give the chance to enhance the volume in your program in a future version, this would be great.
I still love your program as it works well. If just the volume of the output would be better......

hypercube
Member


Joined: 26 Sep 2002
Location: France
Post Posted: Oct 08, 2002 11:58 Posts Comp View users profile Send private message Reply with quote
to your question: yes

to your second question: this will be done. wink.gif

but don't expect 1.2 release before 2 or 3 weeks...

hypercube
Member


Joined: 26 Sep 2002
Location: France
Post Posted: Oct 12, 2002 06:42 Posts Comp View users profile Send private message Reply with quote
I need technical help.

I made a dynamic Range Processor in VC++. Its behaviour is the same
as cooledit with:

Output Gain: 0 dB
Attack Time: 0 ms
Release Time: 0 dB

Level Detector:
Input Gain: 0dB
Attack Time: 0 ms
Release Time: 0 ms
Peak detection

Lookhahead time: 0 ms

so the result is not good. like Cooledit help say:

If the sum of the Attack and Release times is too short (less than 20 milliseconds total), audible effects (such as a “vibrating” sound) can be heard at around 1000 Hz/ms total. For example, if the Attack and Release times are each set to 5 milliseconds (making 10 milliseconds total), then a vibrating sound at 100Hz will be heard. Thus, a total value of about 30 milliseconds is about as low as you can go without introducing these effects.


is there anybody who can help me to implement attack time and release time ?
how it works ? sad.gif

Here what my program do:

- take 1 signed 16 bit sample
- convert it into dB
- take the dynamic ratio to apply to this value (looking up in preset curve)
- apply dynamic ratio
- convert into signed 16 bit sample
- loop until end of WAV file...

I had tested some ideas to implement attack time and release time, but none works
properly. (fade in and fade out effect for example)

another question:
how to compute RMS energy with 16 signed samples ?

if my code works properly, I will put it in next release of hypercube transcoder.
cool.gif

surferjoe
Member


Joined: 12 Jun 2002
Post Posted: Oct 12, 2002 18:04 Posts View users profile Send private message Reply with quote
Hypercube, your problem is far beyond my skills

Iīm sorry, but Iīm still working on getting even my first VB-skills into myself

But maybe you can help me with another problem:
I jsut encoded a divx file (2 parts) to 2 mpeg2 files and also encoded the audio to mpeg2 audio using your program. but when trying to combine the whole shit TMPEG tells me the files are not compatibale?????
Used the same template on video encoding (CBR with 2100 kbits/sec)
and your proggie for encoding the ac3 stream to mpg

amy suggestions on solving this problem???

hypercube
Member


Joined: 26 Sep 2002
Location: France
Post Posted: Oct 13, 2002 15:16 Posts Comp View users profile Send private message Reply with quote
strange... how did you build your MPEG video stream ?
did you select 384kbps for audio like the MPEG Multichannel ?
did you select Multiplex type as MPEG-2 super video CD VBR ?
if not. try this.

surferjoe
Member


Joined: 12 Jun 2002
Post Posted: Oct 13, 2002 16:48 Posts View users profile Send private message Reply with quote
Hypercube, I did it like I allways did, Used TMPEG to encode the mpeg2 file, demultiplexed it to get the pure video stream and multiplexed with the 384 audio stream

The original avi file was a divx4 low motion with 23 f/sec.
Even converting this to a 25 f/s divx5.02 didnīt help curing the problem

real strange

esmerelda1983
Member


Joined: 02 Aug 2002
Location: Australia
Post Posted: Oct 13, 2002 21:51 Posts Comp View users profile Send private message Reply with quote
ok. dumb question here but i still gotta ask.

why not leave the audio in ***.ac3 and multiplex into the video file with TMPGEnc tools?
i would imagine that you would get DD5.1 and not prologic.
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hypercube
Member


Joined: 26 Sep 2002
Location: France
Post Posted: Oct 14, 2002 03:08 Posts Comp View users profile Send private message Reply with quote
No. This is impossible.
you can produce such stream but it never be played by any
DVD player.

the SVCD standard is precise:
http://www.vcdhelp.com/svcd

audio can't be AC3 or DTS. only MPEG 1 layer II or MPEG 2 layer II (5.1 extension).

also, MPEG 1 layer II stereo track can be dolby stereo encoded. So
you can make SVCD dolby prologic II compliant.

Saito
Member


Joined: 13 Oct 2002
Post Posted: Oct 17, 2002 19:37 Posts Comp View users profile Send private message Reply with quote
How? Do I need a special program?

Saito
Member


Joined: 13 Oct 2002
Post Posted: Oct 17, 2002 19:41 Posts Comp View users profile Send private message Reply with quote
oops...that last question was a little dumb. I mean: What program do I need to make a Dolby Prologic ll compliant .mp2/SVCD?