Is it possible to interlace the interlace?

[drewzor]

I have some older footage which appeared to be interlace, everyone here seems to recommend that you leave interlace sources the way they are. So I did, I ripped my old DVD backup of my VHS tape and did alittle cut here improved audio there recoded to DV.
I just burned the disk and its come out like ... well you know what your pcworld magazine looks like after you spilt your morning coffee on it.. rippled? a screen shot of it looks very different to what it looks like to watch.


Now I have done some resize to this file. Is it more likely that the image has "fragmented" like this from the resizings?

Have you seen this before?

[lordsmurf]

You may have the field order wrong.

Or you may have the field order wrong and embedded it as an error.

Or you may have caused problems resizing.

Not enough details to decide which one it is.

At any rate, it's your fault, some wrong settings. Leaving interlaced footage as interlaced is the correct advice and should not result in the mess pictured above.

[drewzor]

To be honest I think that its a resize issue, We orignally filmed this as 4:3 but with an anamorphic lens. (see the fisheye'n)
So this is what i have done.
vob to dvsd 720x576
Resized to WS 768x432 (aspect becomes correct) to the eye that is
Burned to 720x576 anamorphic
Does this help?
I have seen the field order option (first feild) but I leave it at default cos i dont know how to identify what order i should use?

[manono]

Yes, it's a resize issue. You destroyed the field structure when you did what you did. The best way to do an interlaced resize is through AviSynth. One way would be like this:

KernelBob(Order=1)#if TFF
Crop(0,72,0,-72)
LanczosResize(720,576)
SeparateFields()
SelectEvery(4,0,3)#if TFF
Weave()
ConvertToYUY2(Interlaced=True)#if for CCE encoding

[drewzor]

I'm only new to avisynth, cant say I'm a fan yet. the yuy2 issue nearly totalled my puter today.. thats the dangour of a small amount of knowledge.
Could you please explain bob instruction and line 5 of your code?
if you have time that is.. or just post a link to information for me.thanks

remember that the footage was recorded with an anamorphic lens. If i clip 72 off the top and bottom to make it widescreen it will still look stretched tall.. It was my understanding that the footage needed to be pushed down 72pix to look right.

[thecoalman]

edit

[thecoalman]

I'd suggest not cropping and leaving it 4:3, zoom if you watch it on a widesceen TV. As far as watching it on a 4:3 TV there is no benefit in cropping and resizing it, this will actually produce worse results. This is under the assumption that what you are cropping is black bars from the top and bottom???

[jagabo]

Since your anamorphic lens is 16:9 all you have to do is specify 16:9 picture aspect ratio when you create the DVD. Leave the video as it is. That's the point of using an anamorphic lens!

[drewzor]

I have had good results from deinterlace and then resizing the way i did. Aspect look right and footage is ok. But to retain video quality then yes I have left it at 4:3 even though it looks stretched tall, it looks much clearer. lesson here is dont add these types of lens to your camera

Added edit*
DER!
your right you know, that would work.
Thank you for a simple solution.
Sorry I am waisting forum resources