Avisynth: AC3 Trouble

hedix · #1 03-31-2003, 05:10 PM

If I try to open an AVS (virtualdub,tmpegenc) like this

Code:

AviSource('Any_AC3.avi')

and the avi file has AC3 audio, I get the "ACM failed to suggest..." message. But if I open the avi file directly in virtualdub, there's no problem.

I know that Avisynth decompress the audio stream, but seems it cannot manage AC3 audio.

Anyone guess why ?

and, Anyone knows a solution for this ?

Bytecode · #2 03-31-2003, 06:05 PM

I don't have a solution, but I have seen (and tried to no avail) several AC3 codecs that were supposed to work. I think the problem occurs because the AC3 driver most of us have is just a direct show filter(correct?). I HATE AC3, so I allways extract and convert to mp3 or mp2 depending on what I'm trying to encode.

I know it doesn't solve your problem, but I thought I'd add what I've went through so far. ;p

-BC

kwag · #3 03-31-2003, 06:24 PM

Quote:

Originally Posted by hedix

and, Anyone knows a solution for this ?

Try setting or increasing the "DirectShow Multimedia file reader" priority on TMPEG

-kwag

hedix · #4 04-01-2003, 03:38 AM

Quote:

Originally Posted by kwag

Quote:

Originally Posted by hedix

and, Anyone knows a solution for this ?

Try setting or increasing the "DirectShow Multimedia file reader" priority on TMPEG

-kwag

It seems to be an Avisyth trouble, because I can open these AVIs with TMpegEnc, but I can´t do it with the script, no matter what are the priorities of the filters.

What do you think

Jellygoose · #5 04-01-2003, 09:10 AM

Try DirectShowSource instead of avisource. see if that helps!

hedix · #6 04-01-2003, 09:20 AM

Quote:

Originally Posted by Jellygoose

Try DirectShowSource instead of avisource. see if that helps!

Hi,

I'm afraid it doesn´t work. Read elsewhere that DirectShoeSource doesn´t work with sound by now

PyRoMaNiA · #7 04-01-2003, 10:05 AM

Extract the video only with VirtualDub. Open your film in VDub, Click Video, Direct Stream Copy, and Audio, No Audio. Then Save as AVI. The resulting file will have video only, so change your script so that it points towards that.

Jellygoose · #8 04-01-2003, 10:10 AM

why not just try this:
AviSource('Any_AC3.avi', audio=false)

and encode with TMPGEnc (point to the avs file). than remove the line, and open the avi with virtualdub and extract audio.

PyRoMaNiA · #9 04-01-2003, 10:19 AM

Hmm, that's much quicker than my method... Thanks Jellygoose!

hedix · #10 04-01-2003, 11:13 AM

Quote:

Originally Posted by Jellygoose

why not just try this:
AviSource('Any_AC3.avi', audio=false)

and encode with TMPGEnc (point to the avs file). than remove the line, and open the avi with virtualdub and extract audio.

Yes, this is the thing. I'm just trying to find an alternative (one-step)method for ToK users.

Thank you.

Jellygoose · #11 04-01-2003, 01:20 PM

Quote:

Originally Posted by PyRoMaNiA

Hmm, that's much quicker than my method... Thanks Jellygoose!

No problem bro!

Quote:

Originally Posted by hedix

Yes, this is the thing. I'm just trying to find an alternative (one-step)method for ToK users. Thank you.

sorry buddy i missed your intention. I didn't mean to make fun of you or something. Well Pyros way is a bit complicated and space-robbing I guess... isn't there something like an avi-demuxer out there? you could implement that into ToK maybe...[/quote]

hedix · #12 04-01-2003, 02:34 PM

Quote:

Originally Posted by Jellygoose

sorry buddy i missed your intention. I didn't mean to make fun of you or something.

I don´t mean it, man

Quote:

isn't there something like an avi-demuxer out there? you could implement that into ToK maybe...

Hey, this is a good idea

I will try with "decompress", in avi2vcd.

Regards.

PyRoMaNiA · #13 04-01-2003, 03:07 PM

Isn't there a way to just insert something into the script? Like, look for the line: AviSource("*.avi") ...and replace it with
AviSource("*.avi", audio=false)

hedix · #14 04-01-2003, 03:30 PM

Quote:

Originally Posted by PyRoMaNiA

Isn't there a way to just insert something into the script? Like, look for the line: AviSource("*.avi") ...and replace it with
AviSource("*.avi", audio=false)

Yes. What are you thinking about ?

alfredini · #15 04-01-2003, 06:39 PM

acp used VD-Jobs (below) Scripts to extract audio. It also worked well with ac3.
If you can extract the Filename out of the avs script then maybe you can use those Jobs-Scripts too.
Also i find it a good way that acp always used AviSource("video.avi", false)

The call for VD was like that:
C:\Video\VirtualDub\VirtualDub.exe /s"C:\Tmp\audio.jobs" /x

Code:

// VirtualDub job list (Sylia script format)
// This is a program generated file -- edit at your own risk.
//
// $numjobs 1
//

// $job "Job 1"
// $input "M:\royster.avi"
// $output "C:\Tmp\video.avi"
// $state 0
// $start_time 0 0
// $end_time 0 0
// $script
VirtualDub.Open("M:\\royster.avi",0,0);
VirtualDub.audio.SetSource(1);
VirtualDub.audio.SetMode(0);
VirtualDub.audio.SetInterleave(1,500,1,0,0);
VirtualDub.audio.SetClipMode(1,1);
VirtualDub.audio.SetConversion(0,0,0,0,0);
VirtualDub.audio.SetVolume();
VirtualDub.audio.SetCompression();
VirtualDub.video.SetDepth(24,24);
VirtualDub.video.SetMode(0);
VirtualDub.video.SetFrameRate(0,1);
VirtualDub.video.SetIVTC(0,0,-1,0);
VirtualDub.video.SetRange(0,0);
VirtualDub.video.SetCompression();
VirtualDub.video.filters.Clear();
VirtualDub.subset.Delete();
VirtualDub.SaveWAV("C:\\Tmp\\audio.mpa");
VirtualDub.Close();

// $endjob
//
//--------------------------------------------------
// $done

I found this on MarcFD's Site:

Quote:

ac3source
(ac3 decoder)
classic AC3 decoding, with Dynamic range compression
and Stereo downmix.

´
http://ziquash.chez.tiscali.fr/

Maybe you can use a checkbox for AC3 Sources

hedix · #16 04-02-2003, 03:30 AM

Quote:

Originally Posted by alfredini

acp used VD-Jobs (below) Scripts to extract audio. It also worked well with ac3.
If you can extract the Filename out of the avs script then maybe you can use those Jobs-Scripts too.
Also i find it a good way that acp always used AviSource("video.avi", false)

The call for VD was like that:
C:\Video\VirtualDub\VirtualDub.exe /s"C:\Tmp\audio.jobs" /x

Hey !, ToK make the same thing !. I learned from ACP and D2S.

Quote:

I found this on MarcFD's Site:
ac3source
(ac3 decoder)
classic AC3 decoding, with Dynamic range compression
and Stereo downmix.

Yes, but only for Avisynth 2.5

Quote:

Maybe you can use a checkbox for AC3 Sources

First I thougth to always extract audio directly from AVI , but then I cannot encode sources with multiple AVIs, etc. And if you make some audio processing in the script, you loose it too

So maybe your suggestion is the solution

Anyway, any idea is welcome.

alfredini · #17 04-02-2003, 07:35 AM

Quote:

Originally Posted by hedix

Hey !, ToK make the same thing !. I learned from ACP and D2S.

Oowhh really really sorry. The earliear version of ToK didn't worked to encode audio. So i always extract the audio by myself... sorry

Quote:

Originally Posted by hedix

First I thougth to always extract audio directly from AVI , but then I cannot encode sources with multiple AVIs, etc. And if you make some audio processing in the script, you loose it too

So maybe your suggestion is the solution

Anyway, any idea is welcome.

I think VD is able to append Avi files. If you can extract the names of the multiple Avi's... (i am not sure... i don't even have one ac3 Avi source)

PyRoMaNiA · #18 04-02-2003, 10:00 AM

Quote:

Isn't there a way to just insert something into the script? Like, look for the line: AviSource("*.avi") ...and replace it with
AviSource("*.avi", audio=false)

Yes. What are you thinking about ?

Couldn't you just put a checkbox or something, like alfredini said, like "AVI file with AC3 audio" so that ToK doesn't load the audio with the video from the AVS, but just extracts and encodes from the source AVI as with any other file? Or have I got the wrong idea?

hedix · #19 04-02-2003, 12:01 PM

Quote:

Originally Posted by PyRoMaNiA

Couldn't you just put a checkbox or something, like alfredini said, like "AVI file with AC3 audio" so that ToK doesn't load the audio with the video from the AVS, but just extracts and encodes from the source AVI as with any other file? Or have I got the wrong idea?

Yes. I'd like ToK to "know" about audio stream type, but I don´t have time now to play with the avi file header.

So by now it will be the checkbox

Regards

alfredini · #20 04-02-2003, 01:00 PM

I think you don't have to let ToK know about the audio Stream. If you use Append Avi File in VD. VD will handle the multiple Avi's as one Avi. Then you can extract the Audio. This should be possible with the VD-Jobs-Script