Help With Noise Reduction

[Rychezilla]

My friend gave me a VHS tape and also a DVD (converted from the same tape) of his wedding and asked me if I could remove some of the background noise. I thought it would be rather simple, but I am having some problems. Using Goldwave I cannot get the filtered sound back into a mpg. file and using TMPGenc I cannot even open the original file.

Can anyone help the village idiot here with this task? I am simply trying to reduce noise from either a dvd or a vhs. Virtual Dub perhaps, and if so how?

Thanks for your help.

[Tommyknocker]

Use VDub to save the wave. Use Gold Wave to remove hiss from the wave. Use FFMPEGGui to to convert it to an mp2 file, then use TMPGEnc Mux Tools to mux the m2v audio back into the MPEG file.

[Rychezilla]

Use VDub to save the wave. Use Gold Wave to remove hiss from the wave. Use FFMPEGGui to to convert it to an mp2 file, then use TMPGEnc Mux Tools to mux the m2v audio back into the MPEG file.

Thanks for your help. Please forgive my lack of knowledge but I can't even get the first step. How do I get the file into VDub from the DVD in the first place? Do I need to use Decrypter first and convert it to mpeg?

[Tommyknocker]

No. All the video is contained in VOBs. Virtual Dub can load these VOBs.

[Rychezilla]

That's what a thought but when I go to load them it does not give the option to. If I swicth to show "all files" and try to load the VOB that way it says not supported. ???????? I must be missing something simple.

[Tommyknocker]

You are using Virtual Dub mod right?

[FulciLives]

Use DVD Decrypter in IFO mode to "rip" the video and audio. If you set it up correctly you will have a single M2V video file and a single audio file which can be either AC-3, MP2 or LPCM WAV depending on what is on the original DVD.

If you get LPCM WAV then you can load that directly into GOLDWAVE otherwise you can use BeSweet to convert AC-3 or MP2 audio into LPCM WAV which you can then load into GOLDWAVE.

You are better off converting back to AC-3 in the end than MP2 but if the original used LPCM WAV then that you can use that instead. In other words always pick AC-3 over MP2 if you can't use LPCM WAV audio.

- John "FulciLives" Coleman

P.S.
If you do this with DVD Decrypter you will have, as I said, a single large M2V video file. You will need this in the end when you go to your re-authoring stage to put the original video back together with the new audio.

[ZippyP.]

Goldwave should accept the AC3 directly w/o converting to wav.

[FulciLives]

Goldwave should accept the AC3 directly w/o converting to wav.

I didn't know that was possible.

I assume you would really only want to do that if it is a 2.0 AC-3 otherwise how would it "handle" a 5.1 AC-3 etc.?

- John "FulciLives" Coleman

[ZippyP.]

I assume you would really only want to do that if it is a 2.0 AC-3 otherwise how would it "handle" a 5.1 AC-3 etc.?

You're right. I did a little research and it seems that Goldwave can only open AC3 stereo (2.0).

[Soopafresh]

Actually, the easiest way (IMHO) is to

1) Copy the DVD's contents to your hard drive.

2) load up DVD2AVI

3) Load up the vob files

4) Save the WAV file by saving the project.

[ZippyP.]

DVD2AVI can downmix AC3 5.1 to 2 channel wav.