The Simplest Process For 1 Pass Q=2 with AC3 and Lanczos Resize w/o color conversion

[tsnyder41]

Goal: Backup my DVD collection (240) using my CD burner with least possible lost in quality.

I don't care how many cds I would have to use. Also at this time I don't want to buy a dvd burner.

I have tried the following apps
Gknot
VirtualDub
VDubMod
Nundub
Avisynth
DVD2AVI
DVD Decrypter
Divx 5.0.2 and 5.0.3

and read too many guides that tell you what to do and not what you are doing. Anyways my questions are:

1) What is the simplest way to backup my DVD collection using my CD burner with least possible lost in quality.

2) Should I use the autocrop feature in gknot? I want to do the croping and resize myself. How do I use the Lanczos resize?

3) On the 5.0.3 divx codec I couldn't find 1 pass quality pass. Is this only on the 5.0.2?

4) How do I mix in the AC3 untouched? I create on rip so far using the follow process:

DVD Decrypter | DVD2AVI | Gknot | VirtualDub | Nundub

I played it back in zoomplayer and winamp and couldn't get anything out of the center and bass channel. Is their an app the could alyze the video file and give all the info on it, res, bitrate, quatizer, codec, etc.?

5) I have read about the unnecessary color conversion that happens in vdub. How can I prevent that from happening. I tried to use Vdubmod and had no luck.

6) I know most DVD are filtered well. But would any filter help for example Convolution?

I know that this alot at once but I had five days before I could post.

Thanks in advance for any help :)
Matt

[TelemachusMH]

Originally posted by tsnyder41
Goal: Backup my DVD collection (240) using my CD burner with least possible lost in quality.

Wow ... your computer isn't going to be resting any time soon :D

1) What is the simplest way to backup my DVD collection using my CD burner with least possible lost in quality.

The way to do and preserve the most quality is to frameserve from DVD2AVI into Avisynth 2.5 or 2.51 going and open that in VirtualDubMod. So you don't have any colorspace converstions.


2) Should I use the autocrop feature in gknot? I want to do the croping and resize myself. How do I use the Lanczos resize?

If you really want them to be EXACTLY like the dvd then you don't want to crop or resize. However, you probably do want to crop because it will help the filesize, as well as some compression errors. For what you are doing, I am guessing that you don't want to resize, because you would loose details in the picture. You will want to resize with Lanczos if your resolution is not a multiple of 16. It will give you a very sharp picture with the least artifacts. It has a simple syntax (http://www.avisynth.org/index.php?page=Resize)

3) On the 5.0.3 divx codec I couldn't find 1 pass quality pass. Is this only on the 5.0.2?

In order to get the 1-pass quality you have to uncheck the profiles in the last tab. (I think) I would suggest that you try it with Xvid, because it provides a much sharper picture than Divx. In either case for highest possible quality don't use b-frames, gmc, qpel and set it from 100% quality based encoding.

4) How do I mix in the AC3 untouched? I create on rip so far using the follow process:

You can mix ac3 into avi or ogm with VirtualDubMod. If you are going with avi then you will need to look around for the correct interleaving settings. You have to set the preload to 90ms (not frames) and interleave every 90. You can also use 120/120, and quite a few others that I can't remember.

I played it back in zoomplayer and winamp and couldn't get anything out of the center and bass channel. Is their an app the could alyze the video file and give all the info on it, res, bitrate, quatizer, codec, etc.?

I am not sure what ac3 decoder you are using right now, but you might give AC3Filter a try. It is on the download page here, make sure to click to show all under the filters section. While you are there look for GSpot, it will tell you all sorts of information about your video.


5) I have read about the unnecessary color conversion that happens in vdub. How can I prevent that from happening. I tried to use Vdubmod and had no luck.

You have to use AviSynth 2.5 or higher along with MarcFD's mpeg2dec3 (http://ziquash.chez.tiscali.fr/) to avoid color convertions. Also, VirtualDubMod is what you should open it with. If you have all that make sure that dvd2avi is set to YUV 4:2:0 mode when you make the project file.


6) I know most DVD are filtered well. But would any filter help for example Convolution?

You will have to look at all the YV12 filters that are avalible, but you probably want to look at TemporalSoften (http://www.avisynth.org/index.php?page=Soften) as well as Convolution3D (http://www.hellninjacommando.com/con3d/index.html). TemporalSoften is already part of AviSynth 2.5, but you will have to download Convolution3DYV12 (http://www.hellninjacommando.com/con3d/beta/convolution3dyv12.zip)


I know that this alot at once but I had five days before I could post.

Now who has a lot to go through ;)

TelemachusMH

PS You might also want to consult the YV12 FAQ (http://forum.doom9.org/showthread.php?s=&threadid=37276) and feel free to ask post more questions here, I'm subscribed to it now ;)