AC3 5.1 audio sounds terrible

[Movie Nut]

Hi all!
I am new to this (as you have heard many times before) and I have been reading this forum for over a month now. I have looked everywhere in this forum to see if someone else has had this problem and have had no luck finding my answer so I will ask.

I have an AVI file that has AC3 5.1ch audio and am trying to covert it so I can use TMPEGEnc DVD software to give me a good file to burn.

I open up GSpot 2.1 to check the audio format.
Audio Format
Name - AC3(0x2000)"Dolby Laboratories, Inc."
Status - Codec IS Installed (details....)
Bitrate - 448kb/s(89/ch x 5ch) FS - 48000 Hz

I then load Nandub v1.0rc2 to covert it to a WAV
Open AVI file
go to Audio and select Full Processing Mode
go to File and Save WAV
I get the following error
ACM failed to suggest Audio decompressionm format
I click OK and then get
AVIOutputWAV: The handle is invalid
I then go back to Audio and select Direct Stream Copy
go to File and Save WAV all is OK

I then open TMPEGEnc DVD Author
I click New Project
I click Add File
I tag my mpv file all is OK
I tag my WAV file and it says Illegal Audio Format

I open Besweet GUI v0.6 b83
I select were my Besweet 1.4 is all is OK
I select my Input WAV file all is OK
I select my Output AC3 file all is OK
under Hip Use MPA Decoder is checked and I can't uncheck it
SSRC Downconvert Sample Rate is checked (If I uncheck it and try to use orignal sample rate it converts it to 44,100Hz)
AC3ENC I have AC3 selected
under OTA (overall Track Adjustments)Options I have Presets NTSC -> NTSC 23.976 to 29.970 checked seeing how my video file has been changed from 23.976 to 29.970
I click SSRC options on the right middle of the screen and make sure Set Sampling Rate of Output File to 48000Hz is selected
I click AC3/OGG/dts on the right middle of the screen and make sure Bitrate is at 448Kbps
I then click WAV to AC3 and let it encode

after encoding is finished I reload TMPEGEnc DVD Author and do as I did earlier and when I select the new AC3 file it goes in OK
after TMPEGEnc is finished I load NERO and burn my files

Now finally to my question where I need help

When I play the DVD the sound SOUNDS terrible you can barely hear it and it sounds all garbled plus it is out of sync.

Can someone tell me what I am doing wrong and how I can get the 5.1ch audio to sound like it is supposed to?

Also I have tried BeSlicedv0.2 to try and fix the WAV but, when I drag the WAV file into it and select WAV all it does is display an empty notepad file and does nothing else.

I thank you for all your help in advance..

[BJ_M]

i guess the question is ... why are you trying to convert an ac3 file to wav , then back to ac3 ?

[RTailor]

I have tried using the AC3 file that I demux from the avi and after i have run it through ac3fix(because TPMPEG won't accept it if I dont) and muliplex it with my encoded mpg file its all out of sync.

[Movie Nut]

guess the question is ... why are you trying to convert an ac3 file to wav , then back to ac3 ?

I have tried to just use InterVideo WinDVD Creator to just put the AVI file on DVD but, with the AVI file being about 2 1/2 hours long WinDVD Creator just burns it and after 2 hours and 10 minutes the DVD stops playing missing the last 20 minutes of the file. So, I tried to investigate this problem and the only solution that I could come up with was to follow the AVI to DVD guides available here at this site. In the guides it tells you how to extract the video and then the audio into 2 files (from "filename.avi" to "filename.mpv" and "filename.ac3") then use autoring software to create the files for burning to DVD. This is where I am having the problem. I can do the video part no problem and when I follow the different guides that state to open up either Nandub or VirtualDub and extract the audio then use BeSweet or AC3Machine to convert the WAV back to AC3 is where I am having the problem. When I convert the WAV back to AC3 and use the authoring software to create my DVD compliant files and then burn the files using NERO the video looks great but the audio sounds terrible. I would like to keep the audio with the 5.1ch sound. I can convert the audio with other software and have stereo sound but only 2 channels. I would like to keep the 5.1 channels like the original. Thank you for your help...

[Gazorgan]

Nandub is your problem. That's an old version isn't it?

Besweet AC3 is known to be incompatible with DVD standards.

You say it's 'all out of sync'. People are notorius for stripping out the AC5.1 audio, then editing the video. What is the length of the video and what is the length of the audio. Is it a constant offset or a slowing shifting out of sync?

HeadACHe is good for messing around with AC3's .

[Movie Nut]

The length of the audio and the video are the same 2:32:53. The sync gradually gets out seems fine in the beginning and then seems to be about 20 seconds off at the end. I think it has something to do with the frame rate but, I am not sure. I will try HeadAC3he for messing with the audio. Thanks for you help and I will post the results..