The best method of IVTC.....

JayTray · 20th January 2002, 08:53

Hi all,

I have a question. I have used GKnot for Inverse telecine and it isn't flawless. Is TMPEG any better using the automatic settings. Or do you need to manually edit in TMPEG to get perfect results. I have heard GKNot is not the best method of IVTC. I just don't wanna use TMPEG auto settings and get the same results as GKnot. Because it takes a lot longer using TMPEG because you need to use the VFAPI codec to frameserve wich converts the color mode to RGB.

Any ideas?

Zarxrax · 20th January 2002, 17:00

No automatic configuration can do IVTC perfectly. If you care about quality, then you will have to go into tmpg and ivtc manually.

DJ Bobo · 21st January 2002, 21:04

Well, I think you should get rid of GKnot now.
I just use it to tell the crop values.
It can also help to tell an acceptable bitrate, but not more.
Now I make everything GKnot makes, without GKnot.
It's the same way using SmartRipper -> DVD2AVI -> AviSynth -> VirtualDub, all manually configured

You should modify the AVS script manually.
There are many IVTC plugins for AviSynth:
1) IVTC plugin
2) GreedyHMA
3) DeComb

Try everyone of them and use what gives you the best quality

JayTray · 25th January 2002, 11:32

That's Funny bobotns... Thats what I did..
I just went in and removed the # from two places where IVTC plug in was. Of course it wasn't perfect but it was definately the best AUTOMATIC solution for performing AUTO IVTC. TMPEG was a waste of time on the AUTO IVTC! And anytime I got the pattern down in manual method I would have to change something at the beginning of the file. Causing me to have to redo the whole flick.

As for GreedyHMA and DeComb, I think those are for 29.976 rate aren't they? I like 23.976 because you get more bits per frame. But I am totally happy with the results of just plain IVTC plugin.

Say, I wonder why you have to do that manually via Notepad? Why doesn't Gknot just have a Radio button to select if you want to perform IVTC. Or is there one and I'm just not seeing it? There are a lot of things G knot does that you can only do via editing the avs script. Like adding borders and GreedyHMA and DeComb. I only do like you say use Gknot for Clip and resize.

manono · 25th January 2002, 11:48

Hi-

As for GreedyHMA and DeComb, I think those are for 29.976 rate aren't they?

No.

Say, I wonder why you have to do that manually via Notepad?

You don't. You can edit it with the Edit button when setting up the .avs in GKnot. Pretty easy either way, though. He used to have an IVTC button, but I guess he took it out of this version.

JayTray · 26th January 2002, 08:00

Cool... That's good to know...... Thanks manono!

PeZzy · 25th February 2002, 03:54

Try using Decomb with postprocessing turned off. If it turns out you need post processing then you'll probably want to try something else.

Guest · 25th February 2002, 04:37

@PeZzy

Please explain your second sentence. Do you find a problem in Decomb's postprocessing? What "something else" are you referring to? Thank you.

poopity poop · 25th February 2002, 18:47

We are forgetting are-based deinterlacer too

I use tmpeg to ivtc but then run the area-based deinterlacer to get rid of the frames that sneak by

PeZzy · 26th February 2002, 05:30

Quote:

Originally posted by neuron2
@PeZzy

Please explain your second sentence. Do you find a problem in Decomb's postprocessing? What "something else" are you referring to? Thank you.

I have found that using Decomb without postprocessing is good because it catches interlaced frames that sneak past GreedyHMA. I generally have no need to turn postprocessing on. If I do turn it on, I have noticed that movement becomes somewhat choppy, particularly during slow, deliberate action.

Guest · 26th February 2002, 07:56

@pezzy

There is nothing in the postprocessing that can make a clip "choppy". I challenge you to produce a clip that demonstrates this claimed effect.

Just because your material doesn't need postprocessing, you can't generalize that to all material.

Hanty · 6th March 2002, 00:21

My method is do an auto IVTC in TMPGENC, do a quick and dirty encode of it in nandub and then QC this intensely, preferably having someone else look at it as well. If there's some interlacing I discover that has sneaked by I do it manually.

Certainly not a method I can recommend for the impatient, but for quality it has worked best for me.

poopity poop · 6th March 2002, 04:03

I agree with hanty.
The best is decomb, and its very very easy and fast. Takes about two times as long to learn than tmpeg if you want to spent the time.
Anyway...tmpeg is good, than just add an area-based deinterlacer to kill the frames that tmpeg skipped (tmpeg does this a lot)

Vdub filter set up:
area-deinterlacer
Resize
(optional:
noise filter
subtitle)

20th January 2002, 08:53	#1 \| Link
JayTray Registered User Join Date: Nov 2001 Posts: 52	The best method of IVTC..... Hi all, I have a question. I have used GKnot for Inverse telecine and it isn't flawless. Is TMPEG any better using the automatic settings. Or do you need to manually edit in TMPEG to get perfect results. I have heard GKNot is not the best method of IVTC. I just don't wanna use TMPEG auto settings and get the same results as GKnot. Because it takes a lot longer using TMPEG because you need to use the VFAPI codec to frameserve wich converts the color mode to RGB. Any ideas? __________________ Jay Tray

25th January 2002, 11:32	#4 \| Link
JayTray Registered User Join Date: Nov 2001 Posts: 52	That's Funny bobotns... Thats what I did.. I just went in and removed the # from two places where IVTC plug in was. Of course it wasn't perfect but it was definately the best AUTOMATIC solution for performing AUTO IVTC. TMPEG was a waste of time on the AUTO IVTC! And anytime I got the pattern down in manual method I would have to change something at the beginning of the file. Causing me to have to redo the whole flick. As for GreedyHMA and DeComb, I think those are for 29.976 rate aren't they? I like 23.976 because you get more bits per frame. But I am totally happy with the results of just plain IVTC plugin. Say, I wonder why you have to do that manually via Notepad? Why doesn't Gknot just have a Radio button to select if you want to perform IVTC. Or is there one and I'm just not seeing it? There are a lot of things G knot does that you can only do via editing the avs script. Like adding borders and GreedyHMA and DeComb. I only do like you say use Gknot for Clip and resize. __________________ Jay Tray

26th January 2002, 08:00	#6 \| Link
JayTray Registered User Join Date: Nov 2001 Posts: 52	Cool... That's good to know...... Thanks manono! __________________ Jay Tray

25th February 2002, 18:47	#9 \| Link
poopity poop Master of Poop! Join Date: Oct 2001 Location: NY state Posts: 352	We are forgetting are-based deinterlacer too I use tmpeg to ivtc but then run the area-based deinterlacer to get rid of the frames that sneak by __________________ Po[color=dark yellow]o[/color]pity Po[color= dark yellow]o[/color]p

6th March 2002, 00:21	#12 \| Link
Hanty Good cop Join Date: Nov 2001 Posts: 190	My method is do an auto IVTC in TMPGENC, do a quick and dirty encode of it in nandub and then QC this intensely, preferably having someone else look at it as well. If there's some interlacing I discover that has sneaked by I do it manually. Certainly not a method I can recommend for the impatient, but for quality it has worked best for me. __________________ << Have you cleaned your pipes today? >> "It's good to be king"

20th January 2002, 17:00	#2 \| Link
Zarxrax Registered User Join Date: Dec 2001 Posts: 1,229	No automatic configuration can do IVTC perfectly. If you care about quality, then you will have to go into tmpg and ivtc manually.

21st January 2002, 21:04	#3 \| Link
DJ Bobo Encoding Dinosaur! Join Date: Oct 2001 Location: Europe Posts: 1,710	Well, I think you should get rid of GKnot now. I just use it to tell the crop values. It can also help to tell an acceptable bitrate, but not more. Now I make everything GKnot makes, without GKnot. It's the same way using SmartRipper -> DVD2AVI -> AviSynth -> VirtualDub, all manually configured You should modify the AVS script manually. There are many IVTC plugins for AviSynth: 1) IVTC plugin 2) GreedyHMA 3) DeComb Try everyone of them and use what gives you the best quality

25th January 2002, 11:48	#5 \| Link
manono Moderator Join Date: Oct 2001 Location: Hawaii Posts: 7,406	Hi- As for GreedyHMA and DeComb, I think those are for 29.976 rate aren't they? No. Say, I wonder why you have to do that manually via Notepad? You don't. You can edit it with the Edit button when setting up the .avs in GKnot. Pretty easy either way, though. He used to have an IVTC button, but I guess he took it out of this version.

25th February 2002, 03:54	#7 \| Link
PeZzy Registered User Join Date: Feb 2002 Posts: 7	Try using Decomb with postprocessing turned off. If it turns out you need post processing then you'll probably want to try something else.

25th February 2002, 04:37	#8 \| Link
Guest Guest Join Date: Jan 2002 Posts: 21,901	@PeZzy Please explain your second sentence. Do you find a problem in Decomb's postprocessing? What "something else" are you referring to? Thank you.

26th February 2002, 07:56	#11 \| Link
Guest Guest Join Date: Jan 2002 Posts: 21,901	@pezzy There is nothing in the postprocessing that can make a clip "choppy". I challenge you to produce a clip that demonstrates this claimed effect. Just because your material doesn't need postprocessing, you can't generalize that to all material.

6th March 2002, 04:03	#13 \| Link
poopity poop Master of Poop! Join Date: Oct 2001 Location: NY state Posts: 352	I agree with hanty. The best is decomb, and its very very easy and fast. Takes about two times as long to learn than tmpeg if you want to spent the time. Anyway...tmpeg is good, than just add an area-based deinterlacer to kill the frames that tmpeg skipped (tmpeg does this a lot) Vdub filter set up: area-deinterlacer Resize (optional: noise filter subtitle) __________________ Po[color=dark yellow]o[/color]pity Po[color= dark yellow]o[/color]p