little bit of help please...

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DarkPrinceOtaku
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little bit of help please...

Post by DarkPrinceOtaku » Wed Aug 04, 2004 3:47 pm

i know that this question/topic has probably already been asked or explained....but im not willing to go searching through all of the posts..
anyway...when im extracting clips from my dvds...how do i get rid of the lines that goes through the animation when ever i convert the video to a high quality file? its really annoyin & spoils the pictures....
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Post by AMVfreak » Wed Aug 04, 2004 3:49 pm

If you followed these instructions here you shouldnt have any problems.
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Post by DarkPrinceOtaku » Wed Aug 04, 2004 3:58 pm

ok now im confused about what im looking for....is it the interlacing part that i should be looking at?
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Post by kitsunebeolnet » Wed Aug 04, 2004 4:00 pm

DarkPrinceOtaku wrote:ok now im confused about what im looking for....is it the interlacing part that i should be looking at?
Yup.

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Post by DarkPrinceOtaku » Wed Aug 04, 2004 4:01 pm

ok thanks very much ('',)
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Post by Maverick-Rubik » Wed Aug 04, 2004 5:37 pm

I know this is all in the guides, but I feel like breaking down basically why those lines are there and how you can easily get rid of them. If you don't like this, read the guides. It's in your favor. :wink:

Those jaggy lines that are annoying you are a size-reducing algorithm invented by people in order to distribute NTSC television quicker. Thusly, it's used on the mass majority of how dvd's are encoded.

Basically, interlacing compromizes all the frames in the video in half by rendering the odd digits (of the pixels) in one frame and then the even digits in the next.

This is why it looks alright when the animation is still, but only is noticable when things like a mouth is moving or an arm is lifting. The stills basically look the same frame by frame so there's no noticable difference. Anything that moves requires a new frame, thus it has the lines around it since you only see the odd or even pixels being lined up.

We cannot bring these lines back to the way they were 100% progressive. But to get rid of these lines with some well-scripted algorithms, you can simply bring this into vdub (Footnote for those that know more than me: I know about avisynth filters but I'm just going to use vdub's filter as an example, for now); go to "Video" at the top, and select "Filters." Click "Add" and select the "Deinterlace" filter.

It will then give you options on HOW you want it deinterlaced.

1. Blend (recommended) - this basically takes the fields and guesses at what it would look like with whole frames, and then blends the odd and even fields into progressive, complete (in theory) frames.

BEFORE
Image

AFTER
Image

2. Duplicate Field 1 - This pretty much takes the first field and duplicates it to fill in the missing lines (again, in theory).

BEFORE
Image

AFTER
Image
(As you can see, the second frame that should be zoomed in is no longer there since the first field has been copied over to replace it)

3. Duplicate Field 2 - Basically the same premise as with Duplicate Field 1, except the second field is being copied over to fill the gaps where the first field would be this time.

BEFORE
Image

AFTER
Image
(See? The second frame is there now since the first field has been replaced with the second field. The reason why it's half faded is because I faded it in my video, btw)

4. Discard Field 1 - You'll get the same effect with this one as with Duplicate Field 2; however instead of just replacing the gaps in the second field, it's now taking the second field and copying it over twice as well as replacing all the first fields.

BEFORE
Image

AFTER
Image
(As you can see, it has a similar effect to duplicating the second field)

5. Discard Field 2 - Inversive to Discard Field 1, you'll get results similar to Duplicate Field 1. Since, in essence, it's nearly doing the same operation.

BEFORE
Image

AFTER
Image
(As you can see, it has a similar effect to duplicating the first field; we're missing the second frame again)

And 6thly and 7thly we have Unfold fields side-by-side and Fold Fields side-by-side; which I do not think are suitable your predicament.

I hope I helped you in addition to the guides. :wink:

Examples used from the 1335th frame of Another World

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Post by trythil » Wed Aug 04, 2004 7:23 pm

Maverick7013 wrote: We cannot bring these lines back to the way they were 100% progressive. But to get rid of these lines with some well-scripted algorithms, you can simply bring this into vdub (Footnote for those that know more than me: I know about avisynth filters but I'm just going to use vdub's filter as an example, for now); go to "Video" at the top, and select "Filters." Click "Add" and select the "Deinterlace" filter.
You're full of shit.

We don't know if this is telecined or interlaced footage, and what you're telling her, assuming it's interlaced, is harmful.

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Post by trythil » Wed Aug 04, 2004 7:37 pm

trythil wrote:
Maverick7013 wrote: We cannot bring these lines back to the way they were 100% progressive. But to get rid of these lines with some well-scripted algorithms, you can simply bring this into vdub (Footnote for those that know more than me: I know about avisynth filters but I'm just going to use vdub's filter as an example, for now); go to "Video" at the top, and select "Filters." Click "Add" and select the "Deinterlace" filter.
You're full of shit.

We don't know if this is telecined or interlaced footage, and what you're telling her, assuming it's interlaced, is harmful.
Eh, I guess that was a little harsh.

The thing is, you should treat telecined and interlaced footage differently, as it is usually possible to restore a telecined video stream to progressive frames.

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Post by Scintilla » Wed Aug 04, 2004 7:42 pm

Maverick7013 wrote:Basically, interlacing compromizes all the frames in the video in half by rendering the odd digits (of the pixels) in one frame and then the even digits in the next.
If by "digits (of the pixels)" you mean "horizontal lines", then yes.

And the way you explain it, you make it sound like each field is only updated every other frame.
Maverick7013 wrote:We cannot bring these lines back to the way they were 100% progressive.
What the hell? You can if it's a reasonably clean telecine. That's what IVTC is for.
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Post by SpYdEr_Dan » Wed Aug 04, 2004 7:48 pm

Maverick7013 wrote:I know this is all in the guides, but I feel like breaking down basically why those lines are there and how you can easily get rid of them. If you don't like this, read the guides. It's in your favor. :wink:

Those jaggy lines that are annoying you are a size-reducing algorithm invented by people in order to distribute NTSC television quicker. Thusly, it's used on the mass majority of how dvd's are encoded.

Basically, interlacing compromizes all the frames in the video in half by rendering the odd digits (of the pixels) in one frame and then the even digits in the next.

This is why it looks alright when the animation is still, but only is noticable when things like a mouth is moving or an arm is lifting. The stills basically look the same frame by frame so there's no noticable difference. Anything that moves requires a new frame, thus it has the lines around it since you only see the odd or even pixels being lined up.

We cannot bring these lines back to the way they were 100% progressive. But to get rid of these lines with some well-scripted algorithms, you can simply bring this into vdub (Footnote for those that know more than me: I know about avisynth filters but I'm just going to use vdub's filter as an example, for now); go to "Video" at the top, and select "Filters." Click "Add" and select the "Deinterlace" filter.

It will then give you options on HOW you want it deinterlaced.

1. Blend (recommended) - this basically takes the fields and guesses at what it would look like with whole frames, and then blends the odd and even fields into progressive, complete (in theory) frames.

BEFORE
Image

AFTER
Image

2. Duplicate Field 1 - This pretty much takes the first field and duplicates it to fill in the missing lines (again, in theory).

BEFORE
Image

AFTER
Image
(As you can see, the second frame that should be zoomed in is no longer there since the first field has been copied over to replace it)

3. Duplicate Field 2 - Basically the same premise as with Duplicate Field 1, except the second field is being copied over to fill the gaps where the first field would be this time.

BEFORE
Image

AFTER
Image
(See? The second frame is there now since the first field has been replaced with the second field. The reason why it's half faded is because I faded it in my video, btw)

4. Discard Field 1 - You'll get the same effect with this one as with Duplicate Field 2; however instead of just replacing the gaps in the second field, it's now taking the second field and copying it over twice as well as replacing all the first fields.

BEFORE
Image

AFTER
Image
(As you can see, it has a similar effect to duplicating the second field)

5. Discard Field 2 - Inversive to Discard Field 1, you'll get results similar to Duplicate Field 1. Since, in essence, it's nearly doing the same operation.

BEFORE
Image

AFTER
Image
(As you can see, it has a similar effect to duplicating the first field; we're missing the second frame again)

And 6thly and 7thly we have Unfold fields side-by-side and Fold Fields side-by-side; which I do not think are suitable your predicament.

I hope I helped you in addition to the guides. :wink:

Examples used from the 1335th frame of Another World
personally, for somebody who hasnt a clue in hell how to clean up those naughty interlacing lines, this can be quite helpful.

not everyone knows of the wonders of NTSC or IVTC or whatever they are actually....some people want a quick fix, where as others want things properly done. while i do not know of the ways to do things properly, i will certainly make note of this to use for things when such a problem presents itself again.

good lookin out
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