A question for Gordian Knot users...

[Spark]

Ok I have been trying out Gordian Knot to convert my vob files into avi. I was using Dr.Divx but have been having issues with the video and sound being out of sync. My problem is say for eg. I bring in a video vob with a resolution of 1024 by 576 into DGindex it shows it as being 720 by 576, and then when I want to convert it with the xvid codec it treats the input d2v file as 720 by 576 instead of the higher resolution I started with.

I can find no way to keep the input resolution the same as I started out with so that my final avi file is also 1024 by 576 (unless I upscale with xvid from 720 by 576 to 1024 by 576, but then I lose out on quality). I must be missing somthing, with Dr.Divx it is so easy.

I did try posting on Doom9 forum, but I have to wait 5 days minimum after registering to post....

 

[kronoSX]

try using xvid4psp,with your files.Its a very in detail program.give it a wirl

 

[Random717]

Are you using GK or AutoGK?
don't have it installed atm, and last time I used GK was ages ago... but I remember you could set the aspect ration under the resolution tab (?). I used to set it to 1:1 and then set the resolution on the right hand side of the screen to match the vob file.

With the sound, I would manually add the mp3 file to the avi file with avimux which allows you to set delays.

 

[Spark]

Are you using GK or AutoGK?
don't have it installed atm, and last time I used GK was ages ago... but I remember you could set the aspect ration under the resolution tab (?). I used to set it to 1:1 and then set the resolution on the right hand side of the screen to match the vob file.

With the sound, I would manually add the mp3 file to the avi file with avimux which allows you to set delays.

I am using GK atm. Yes I also tried setting as you suggest but the reason I was not happy doing so is it seemed as though I would be "fooling" the program into thinking the input resolution was somthing it wasn't. Why would it be reading it as 720 by 576 if infact it is 1024 by 576? Can DGindex downscale the resolution when it converts the vob files into a d2v file?

Thanx for the answers guys.

 

[Random717]

Is 720 by 576 the default resolution? I think I ripped the same dvd 5 times before I got it right, and then I stuck to what worked, without spending more time figuring out why

 

[Spark]

Is 720 by 576 the default resolution? I think I ripped the same dvd 5 times before I got it right, and then I stuck to what worked, without spending more time figuring out why

Yes it is the default resolution. DGindex seems to be converting it to that. Thats what it looks like anyways. Thing is I want to do it right as I'm after a best quality rip.

 

[bwana]

1024 by 576 - does that include black bars?

How does it look when you're done?

 

[Spark]

1024 by 576 - does that include black bars?

How does it look when you're done?

Thats with no black bars, there were none to begin with. I thought it was strange but a few of the vids I have ripped are odd sizes like that. If I rip in Dr.Divx it is a perfect replica of the original, GK resizes it.

 

[bwana]

Thats with no black bars, there were none to begin with. I thought it was strange but a few of the vids I have ripped are odd sizes like that. If I rip in Dr.Divx it is a perfect replica of the original, GK resizes it.

Does it look bad then? Distorted?

 

[Rkootknir]

I am using GK atm. Yes I also tried setting as you suggest but the reason I was not happy doing so is it seemed as though I would be "fooling" the program into thinking the input resolution was somthing it wasn't. Why would it be reading it as 720 by 576 if infact it is 1024 by 576? Can DGindex downscale the resolution when it converts the vob files into a d2v file?

Thanx for the answers guys.

If it's a DVD rip then it can only be one of 2 resolutions: 720x480 for NTSC or 720x576 for PAL. The 1024x576 you're seeing is the result of AR signaling and is not the original source resolution.

[edit]
Try using meGUI as the frontend for AVIsynth and the codecs. It was also written by the doom9 guys and it's much more up to date than GK.

 

[w1z4rd]

Use a Codecs pack called Ace Mega Codecs... got everything you need.

 

[Spark]

If it's a DVD rip then it can only be one of 2 resolutions: 720x480 for NTSC or 720x576 for PAL. The 1024x576 you're seeing is the result of AR signaling and is not the original source resolution.

[edit]
Try using meGUI as the frontend for AVIsynth and the codecs. It was also written by the doom9 guys and it's much more up to date than GK.

Well thats what I have been battling to understand, but if you look at the video you can actually see that it is 1024 by 576 and is not stretched or anything like that. If it gets corrected to 720 by 576 then it either stretches the film like the beginning of a Clint eastwood movie , or it would crop the ends. Unless I am misunderstanding?

Thanks for the hint on meGUI, I'll check it out.

 

[Fudzy]

Whats the difference between Gordian Knot and Dr. DivX?

 

[bwana]

Well thats what I have been battling to understand, but if you look at the video you can actually see that it is 1024 by 576 and is not stretched or anything like that. If it gets corrected to 720 by 576 then it either stretches the film like the beginning of a Clint eastwood movie , or it would crop the ends. Unless I am misunderstanding?

Thanks for the hint on meGUI, I'll check it out.

I cant see how it can be - as Rkootknir said dvds most commonly come in two formats - 720×480 (NTSC) or 720×576 (PAL).Resolution
The typical video resolution for an NTSC disc is 720 × 480, while a PAL disc is 720 × 576.

The specifications for video files on a DVD can be any of the following:
Up to 9.8 Mbit/s (9800 kbit/s) MPEG-2 video
Up to 1.856 Mbit/s (1856 kbit/s) MPEG-1 video
PAL:
720 × 576 pixels MPEG-2 (Called full D1)
704 × 576 pixels MPEG-2
352 × 576 pixels MPEG-2 (Called Half-D1, same as the China Video Disc standard)
352 × 288 pixels MPEG-2
352 × 288 pixels MPEG-1 (Same as the VCD Standard)
NTSC:
720 × 480 pixels MPEG-2 (Called full D1)
704 × 480 pixels MPEG-2
352 × 480 pixels MPEG-2 (Called Half-D1, same as the China Video Disc standard)
352 × 240 pixels MPEG-2
352 × 240 pixels MPEG-1 (Same as the VCD Standard)

Have you actually tried using the GK settings? What does it look like?

 

[Rkootknir]

Well thats what I have been battling to understand, but if you look at the video you can actually see that it is 1024 by 576 and is not stretched or anything like that. If it gets corrected to 720 by 576 then it either stretches the film like the beginning of a Clint eastwood movie , or it would crop the ends. Unless I am misunderstanding?

Thanks for the hint on meGUI, I'll check it out.

DGIndex will show actual source size. Almost all other ways of viewing it will take AR signaling into account.

It's most probably an anamorphic file and so the source is the distorted version, which then gets corrected by the AR signaling. I think you have a 16:9 PAL VOB (576*16/9=1024, which is your horisontal resolution), but it could possibly be something else.

See SeeMoreDigital's page on AR and anamorphic images here.

[edit]
Woohoo, 500 posts and I didn't even notice until now.

 

[Spark]

DGIndex will show actual source size. Almost all other ways of viewing it will take AR signaling into account.

It's most probably an anamorphic file and so the source is the distorted version, which then gets corrected by the AR signaling. I think you have a 16:9 PAL VOB (576*16/9=1024, which is your horisontal resolution), but it could possibly be something else.

See SeeMoreDigital's page on AR and anamorphic images here.

[edit]
Woohoo, 500 posts and I didn't even notice until now.

Ah ok now I think I know what is going on. Thanks a million for pointing me in the right direction! After reading your link i found another one with diagrams that makes it really easy to understand, I'll put it here incase anyone else is interested- http://gregl.net/videophile/anamorphic.htm.

I wasn't aware that they stretched the image vertically to store more data...
Ok so if my understanding is correct then the right way to encode would be to leave the input at 720 by 576 and set the output to 1024 by 576! Thanks again, I'll try it out and let you know how it goes.

Oh and congratulations on reaching 500 posts. Woah bwana, looks like you eat up 500 posts in a day .

 

[Spark]

I cant see how it can be - as Rkootknir said dvds most commonly come in two formats - 720×480 (NTSC) or 720×576 (PAL).Resolution
The typical video resolution for an NTSC disc is 720 × 480, while a PAL disc is 720 × 576. http://en.wikipedia.org/wiki/DVD-VideoHave you actually tried using the GK settings? What does it look like?

I have tried encoding it at 720 by 576 and set the output at 720 by 576, the image is stretched vertically.

If I force the input to 1024 by 576 and set the output at 1024 by 576 it comes out fine.

After reading up on it though it seems like the right way to do it is to leave the input at 720 by 576 and set the output to 1024 by 576.

 

[Spark]

Whats the difference between Gordian Knot and Dr. DivX?

From my understanding the main diference is that Dr.Divx uses the divx codec only. The divx codec is available for free, but with limited functionality.For example Insane quality ripping is disabled. You have to pay to get the pro codec with all the bells and whistles. The good thing about Dr.Divx is that it is very simple to use but yet quite nicely configurable. Gordian Knot is completely open source and we all know what open source projects can be like as far as ease of use and graphical interface is concerned. GK can use either DivX codec or the xvid (open source) codec and is highly configurable. I havent played round with it much so I cannot comment on quality but it is supposed to be as good as the divx codec.

The reason I am using GK and xvid is because the divx codec often fails jobs that the xvid codec does not. In my experience (not a lot...) divx seems to be fussier about the quality of the vob's. For example there is a movie I am trying to encode in divx atm, the sound and video are perfectly in sync at the beginning but by the end of the movie they are out by a second of so. The same movie encoded in GK using xvid is perfect.

 

[bwana]

/Slightly o/t

I started encoding with h264 instead of xvid/divx and while it might take longer the results are fantastic and certainly worth the effort if you're archiving a dvd. I even went back through my dvd collection and re-encoded the ones I had previously done with xvid.

 

[Spark]

/Slightly o/t

I started encoding with h264 instead of xvid/divx and while it might take longer the results are fantastic and certainly worth the effort if you're archiving a dvd. I even went back through my dvd collection and re-encoded the ones I had previously done with xvid.

Thats good to know, is the quality better and file size smaller as well? What application are you using to encode with h264? I would like to give it a bash.