Need help with Virtual dub

[br342]

Ok I am trying to use the guide to get the wav from the divx movie
It says to open video file
file information to check the FPS
Audio-Full processing mode
Audio-Compression-no compression
Audio-conversion- change to 44100hz for VCD
Save Wav


Then I keep getting this Error message?
The Requested audio compression is not compatable with the input format. Check the sampling rate and channel count of the input match those of the requested format.

The original compression listed in the file information says Unknown(tag0055)? Any help is appreciated

[banjazzer]

Look for the guide to converting DivX with AC3 audio.

[Kevin Henry]

Sounds like ac3 audio.

Extract as .wav, but use direct stream copy.

Rename the 'audio.wav' to 'audio.ac3' then open in Headac3he and convert to a real .wav

THAT'S not in the guide

[DJRumpy]

You don't have to fudge with the audio "Direct Stream Copy" settings. Just open the file in virtual dub, and select FILE | SAVE AS WAV

The rest of Kevin's post is accurate. Rename the .WAV to .AC3, and convert it in the program of your choice.

A word of warning. Extracting an AC3 in this manner tends to produce errors in the AC3 frames. If you want to keep the file in AC3 format, and import the ac3 into any higher end authoring software for DVD, then you'll need to repair it. Use AC3Fix.exe to fix the broken frames.

[banjazzer]

You don't have to fudge with the audio "Direct Stream Copy" settings. Just open the file in virtual dub, and select FILE | SAVE AS WAV

In some cases you do. I know it is possible to get Virtualdub to handle AC3 by using the Nimo bundle, but I prefer not to install Nimo. Some think it is wonderful, but it can also be the cause of various problems. In which case, my preferred method is to use the Direct stream copy method, and handle the AC3 with something like HeadAC3he. 8)

[DJRumpy]

Just curious, what kind of problems did you have with Nimo?

[banjazzer]

I haven't personally, but I've seen various reports of people installing Nimo and then getting subsequent sofware conflicts. Perhaps one of the problems is that there are various versions of Nimo about?

In general I think it's best to only install the codecs you actually need, as and when you need them.

[br342]

I did like you guys said and and did the direct Stream copy and saved as a wav and it worked ! But now I need to know where to get HeadAC3he and AC3Fix.exe, I don't see them here in the tools section.
Also when this is done then I guess I use TMpnec and merge the ac3 and video file to a saved Mpeg1 file correct?

Thanks again

[alirio]

sup bs342,

it's under the audio tools section...
http://doom9.org/index.html?/software.htm
after that your sources will look like this in TMPGEnc:

Video Source: xxx.avi
Audio Source: xxx.wav (converted from AC3)

[br342]

Can"t I just keep the AC3 file that was stripped with vitual dub and then use Tmpnec with it to make the mpeg1 file and burn a vcd? i want the ac3 sound anyway and HeadAChe looks like a pain in the a** to use.

[banjazzer]

If TMPG will load it, it will still be converted to mp2! You cannot use the AC3 unless you convert it.

Once HeadAC3he is installed it is very simple to use (and extremely useful). 8)

[br342]

ok i tried to use HeadAC3he with the ac3 file and when I tried to load it in the source file i get error message. Could not find AC3 Header?
anyone know why?

[banjazzer]

One reason could be that you don't have an AC3 file! I presume you can play this DivX with audio? Next I would load it into Graphedit and tell us what boxes come up when you attempt to render the file (CTRL +R).

[DanW]

Did you make sure to rename the file with the extension of .ac3?

[DJRumpy]

It's probably not an AC3 file. I've run into a few DIVX files using MP3 audio. A quick look at the properties in Virtual Dub should also tell us what kind of audio it has.

[drewbie]

i have the ame exact problems so far...headache gives me the same error and everything, im guessing the audio is not ac3 either and virtualdub reports that the audio stream compression is unknown(tag 0055) ...errr, does that mean its not mp3 either? and yes i can play the movie fine in WMP. any help here?

[banjazzer]

I suggested a few posts back to run it through Graphedit to see what shows up. Without specific information these are just shots in the dark.

However, if it's not AC3 or ogg, then you could try the following, which works in certain cases when other things won't:

In Virtualdub, Audio>Direct stream copy. Save out "wav"
Rename this "wav" to .mp3.
Use WinAmp or some other prog to convert to wav.

[drewbie]

the boxes order like this:
my_avi.avi--->avi splitter--->DivX Decoder filter--->AVI decompressor--->video renderer

then the second row splits off the "avi splitter" box into:
MPEG Layer-3 decoder--->Morgan stream switcher--->default directsound device

am i looking at mpeg layer-3 decoder here?thanks for any help![/img]

[banjazzer]

Then treat the avi like I suggested in my last post.

[drewbie]

ok i converted it to a wav, does that mean it was definately a mp3 file? now, how do i add it back to the avi?

[banjazzer]

I thought you were trying to extract it from the avi?

If you want to put it back, Load avi into Virtualdub. Video>Direct stream copy. Audio>Full processing mode. Browse to wav and choose mp3 audio compression. Then save avi.

Or

Convert the wav to ABR mp3 using HeadAC3he, or VBR mp3 with MMJB, or whatever. Multiplex avi and mp3 using Nandub (a modified Virtualdub). Interleave, leave as default. Audio and Video both Direct stream copy, and save avi.

[drewbie]

i already extracted the audio from the avi using virtualdub, then i renamed the wav file to a .mp3, then converted it to a .wav using winamp(im guessing it WAS in fact a mp3 if it successfully converted?)k, now u say browse to the wav but use mp3 compression? i dont see an mp3 compression option, and why would i want mp3 compression whne i just converted the audio to wav format and if thats what was screwing the whole thing up?thanks for all ur help man!

[banjazzer]

and why would i want mp3 compression whne i just converted the audio to wav format

I have no idea. You just said:

now, how do i add it back to the avi?

If you have an avi which plays OK on your PC, I am not sure why you want to extract the wav in the first place, or add it back. The usual reason for extracting is if you want to convert to another format, and you need an uncompressed wav, which I have told you how to do.

Perhaps if you explain your objectives in this it will be a bit clearer. 8)

[drewbie]

lol! i really think we lost each other somewhere along the way. i think i got it now with ur original idea of seeing if the audio was mp3 format. it WAS mp3 format, so after i extracted the audio from the avi, i converted it to a .wav file(like u suggested) and then i needed to put the wav formatted audio into the avi file right? and thats where i think we got lost, but i added the wav formatted audio to the avi. oh and the original reason why i was doing this is because i got that error when opening the avi remember? well, now there is no error thanks to ur help, so i think everything will work correctly! u rock! did i explain everything correctly?i think so.....thanks again!

[DVDFan99]

My goal is to author DVD with Dolby Digital sound (ac3).

So I extracted video file m2v from AVI using TMPGEnc

I then extracted audio file ac3 using VirtualDub (renamed to ac3) as described at: http://www.vcdhelp.com/forum/userguides/91588.php

I wanted to merge (mux) these 2 files into DVD-formatted mpg, but TMPGEnc doesn't accept ac3, so I tried to use HeadAC3he (with azid.dll in the same folder of HeadAC3he as mentioned by its author) to fix the problem of TMPGEnc, but HeadAC3he gave me the error "Could not find AC3 header"

What worng have I done?

Please help
DVDFan99

[banjazzer]

So I extracted video file m2v from AVI using TMPGEnc

I don't understand this part. You will only get an m2v file from an mpeg. Do you mean you encoded the avi, then extracted the m2v?

but HeadAC3he gave me the error "Could not find AC3 header"

What makes you sure the avi has AC3 audio?

[DVDFan99]

TMPGEnc can extract m2v from AVI [choose "ES (Video only)"]

For whether AVI has ac3, I am not sure. Here is how I ripped video into AVI: my sourse was from an analog signal (VCR with S-Video output), but I used a Sony TRV340 DV camcorder to convert analog signal into digital signal (that is, from VCR to Sony DV camcorder through S-video & A/V cables, and then from camcorder to PC through a 4-pin firwire cable). I used Pinnacle Studio 7 to capture AVI (with ATI All-in-Wonder 8500 capture card).

Is there anyway I can check to see if my AVI has ac3? (My AVI was captured with "DV Video Encoder" codec, which is supposed to produce digital AVI)

[banjazzer]

TMPGEnc can extract m2v from AVI [choose "ES (Video only)"]

An m2v file is an mpeg video stream. You could only get that if you encoded your avi first to an mpeg.

Is there anyway I can check to see if my AVI has ac3?

Unless your avi was created specifically using the Dolby Digital audio stream from a DVD, your audio is not AC3.

The rest of you - stop laughing.

[DJRumpy]

LOL

Ahh..the trials and tribulations of the Just....

[banjazzer]

hehe. Just not wide enough awake! 8)