Interlaced vobs HOW do I...

[davidrose9]

...take those nasty lines out of my Xvid movie I used dvd2avi unchecked force film. I tried useing smart deinterlace I checked (Frame-only differencing), (Use cubic for interpolation) and default settings at 15 for Motion threshold and 100 for Scene change threshold, it changed the lines made them fatter infact. Please is there a simplified method?
I am useing virtualdub with Xvid compression I have not had any trouble until this point. The dreaded Frame Type is Interlaced and Video Type is either NTSC I am certian someone knows the best way.


Thank you I love these forums I started only a few months ago and have rad alot here learned some and am makeing some awesome backup that I play on my new 16.9 HD tv from my pc I love the quality and sound thank God for all of you.

[Jan Marijniszoon]

I am a PAL-user, so I don't know everything about NTSC.
But if it is a real interlaced-source then it has in fact 59.94 fields.

If you have got the bitrate for it, you could try progressive scan on it. Amazing smooth playback with 59.94 frames per sec :-)

A good simple de-interlacer to my opinion is Decomb. Quite simple options; standard option works good enough for me. This is not progressive scan, you only get 'clean' 29.97 fps with this one.

What also could work great is just to encode it interlaced with XviD (so leave the 'lines' intact) and use a deinterlace-filter from ffdshow, so you can de-interlace it while decoding.

For more info be sure to check out this site:

http://www.100fps.com

It describes what interlaced material actually is and it also describes some of the best methods of de-interlacing!

Good luck!

Greetings,
Jan.

[mf]

Originally posted by Jan Marijniszoon
For more info be sure to check out this site:

http://www.100fps.com

It describes what interlaced material actually is and it also describes some of the best methods of de-interlacing!
And has some of the simplest and stupidest misassumptions I've ever seen, which the author does not acknowledge.

[Jan Marijniszoon]

Originally posted by mf
And has some of the simplest and stupidest misassumptions I've ever seen, which the author does not acknowledge.

I've heard that one before yes.
But could you name some things?

I do not have real technical knowledge on this field, but thanks to his site I finally understand interlacing and most of the methods he describes do work.

I still think this person deserves credit!
He took the time to make this site and for a lot of people (especially newbies) it is very educating.

Greetings,
Jan.

[Stranger]

If you have a 29.97 fps movie this is not interlaced but telecined.

If this is the case you can safely use telecide from decomb.dll (to perform inverse telecine obtaining a 29.97 fps video with some repeated frame) followed by decimation(5) to obtain a progressive 23.976 fps video.

If your source was badly telecined (like some anime, NGE DVD is a good expample) probably you will need some postprocessing in telecide, but you can check in VirtualDub viewing frame-by-frame some lateral (vertical) pan of the camera.

For PAL interlaced video solution is the FieldDeinterlace, always from decomb.dll


Anyway, this is far away from XviD forum...


Bye for now.
Stranger

[Jan Marijniszoon]

Originally posted by Stranger
If you have a 29.97 fps movie this is not interlaced but telecined.
If this is the case you can safely use telecide from decomb.dll (to perform inverse telecine obtaining a 29.97 fps video with some repeated frame) followed by decimation(5) to obtain a progressive 23.976 fps video.

This is true...but he already tried "Force Film" in DVD2AVI.
I never use this option, so I don't know if it works or not.
But seems to me it is true interlaced-material.
What kind of material is it?
TV-episodes or p*rn are almost always interlaced.

For PAL interlaced video solution is the FieldDeinterlace, always from decomb.dll

This is true!
You can use FieldDeinterlace(blend=false) to interpolate the line-areas (interpolating is better quality then blending)

Anyway, this is far away from XviD forum...

Also true :-) although he is encoding with XviD and that codec has an interlaced-option.

Greetings,
Jan.

[mf]

Originally posted by Jan Marijniszoon
He took the time to make this site and for a lot of people (especially newbies) it is very educating.
Well that's the problem. After initial miseducation it's hard to bash things out of someone's mind. I could look up some stuff for you later, I sent a mail to the guy once.

[davidrose9]

Thanks alot for the help I am working with a REO Speedwagon and Styx reunion concert DVD I will try all these sug.. and try to get this to look a bit better

Regards David

[BoNz1]

Something else you may want to check out if you are using mpeg2dec3 and avisynth you can try field based postprocessing, something like MPEG2Source("movie.d2v",cpu=4,iPP=true) then use a deinterlacer of your choice. You can use lower values for cpu as well since 4 might be a little strong, or you can always use 0. ;)

[Jan Marijniszoon]

Originally posted by davidrose9
Thanks alot for the help I am working with a REO Speedwagon and Styx reunion concert DVD I will try all these sug.. and try to get this to look a bit better

I was playing with a concert-dvd recently. These are indeed truely interlaced-material. Telecine won't help you then I'm afraid.

@mf
Interlaced sources and de-interlacing are subjects that interest me.
Would appreciate it if you could indeed give me some links to technical correct information.

Greetings,
Jan.

[symonjfox]

For PAL users: you could keep the interlaced frames (using Xvid option). You just resize it orizzontally, and use FFDSHOW for playback on PC monitor (setting aspect ratio and a deinterlacing filter).

You'd say: "why"? Because these encodes will look bad in a PC monitor, but they will look great while played on a TV (using the TV out of your Video Card).

For NTSC: sorry, I don't know. I think that it would be possible keeping telecined frames, but, I live in Italy ... PAL ... you understand ;)

[Stranger]

Originally posted by Jan Marijniszoon
I was playing with a concert-dvd recently. These are indeed truely interlaced-material. Telecine won't help you then I'm afraid.


If this is an interlaced input it could be useful the fileddeinterlace filter inside the decomb.dll

for instance try this avs script:

LoadPlugin(decomb.dll)
LoadPlugin(Mpeg2dec3)
mpeg2source("yourmovie.d2v")
crop(...)
FieldDeinterlace(full=true, dthreshold=3, blend=false, chroma=true)
LanczosResize(...)

After this operation you get a deinterlaced 29.97 fps video and can compress with xvid or any other video codec you like.

You can simply distinguish between a telecined video from an interlaced video looking frame-by-frame in VD: if 2 frame every 5 seems interlaced then it is probably a telecined source. Obviously you have to make a d2v project without Force Film option.

[Guest]

Originally posted by davidrose9
I used dvd2avi unchecked force film. I tried useing smart deinterlace I checked (Frame-only differencing), (Use cubic for interpolation) and default settings at 15 for Motion threshold and 100 for Scene change threshold, it changed the lines made them fatter infact.What color space did you deliver from the mpeg decoder and were you using VirtualDubMod? There is an explanation of this based on incorrect YV12 upsampling (the sampling is interlaced but the codec uses progressive). Try delivering YUY2 from the mpeg decoder if you want to filter in VirtualDub(Mod).

[Guest]

Originally posted by mf
And has some of the simplest and stupidest misassumptions I've ever seen, which the author does not acknowledge. Ah, someone else noticed that too! I feel vindicated. :)