statistics window

[Gorr]

There's a guide http://www.doom9.org/mpg/dvd2avi2.htm.
I dont quite understand the meaning of Video Type field in statistics window.

Could anyone clear this up for me please.

Thanks

[Mac Sidewinder]

Once you have loaded the vob files press the F5 key and a statistics window appears while the film plays. This is the window that will tell you if it is in NTSC, FILM, etc.

Mac

[hakko504]

This post has led to the creation of this article, posted at Doom9's site (http://www.doom9.org/ivtc-tut.htm):

Force Film, IVTC, and Deinterlacing - what is DVD2AVI trying to tell you and what can you do about it? (http://www.doom9.org/ivtc-tut.htm)

[jggimi]

Hakko, your post ought to be placed in Doom9's GUIDE, Doom9's FAQ, and as a Sticky thread on every forum!

[hakko504]

Thank you jiggimi :D

This was only written with the idea that it should explain when to use Force FILM or IVTC. If it should be useful for general use then it should probably explain what interlaceing is, what the theory is behind de-interlacing and something intelligent on different resolutions too. I will try to update the post later this week with that kind of information.

Edit: lo and behold, it has been done.

[Gorr]

Thanks hakko504 that puts everything at place to me now.
Telecining was exactily what I was doing when making dvds out of 24 fps sources. <G>

Guides sometimes lacking the description of the base concepts and theories befor diving into detail dense. Then it becomes extrimely difficult to get around without a human assistance.

Thanks again for the help.

[hakko504]

Previuos post updated.

[FreierGeist]

just one question...
When we can't IVTC a source that DVD2AVI says that it's 29.970 fps?
When the IVTC (even well configurated) will screw up the "sequence" and become a "bad ivtc"?

i thought that its when the source was PURE Interlaced, am i right?

thanks!

[]s

[hakko504]

@freiergeist

You're right, bad IVTC will most of the time show up as FILM xx% or NTSC yy%, not as pure NTSC in the preview window. I'm not very clear at this point so I'll try to fix it.

Edit: Force FILM entry updated with this info.

[FreierGeist]

http://forum.doom9.org/showthread.php?s=&threadid=24411

i'm not completely sure about it too

but i think that the "impossibility" of an IVTC it's related with the source being INTERLACED or not...

:confused:

[]s

[hakko504]

Originally posted by FreierGeist
but i think that the "impossibility" of an IVTC it's related with the source being INTERLACED or not...

:confused:
Correct, a truly interlaced source can not be IVTC'd. Unfortunately for us, DVD2AVI can not distinguish between bad telecining and genuine interlace. They will both appear in the statistics window as NTSC. One way of finding which is wich is first using DVD2AVI to approximately find the NTSC parts of the film. Then use look at the following .avs in VirtualDub:LoadPlugin("mpeg2dec.dll")
LoadPlugin("Decomb.dll")
MpegSource("clip.d2v")
Telecide(post=false)
If the parts that DVD2AVI identified as NTSC mostly appear correct when studying the .avs then the film can be IVTC'd, otherwise it's interlaced and you must de-interlace it.

[clima]

Excellent lexicon hakko :)

[1loser]

Originally posted by hakko504
If the parts that DVD2AVI identified as NTSC mostly appear correct when studying the .avs then the film can be IVTC'd, otherwise it's interlaced and you must de-interlace it. We all appreciated all the time you put into this valuable post. Could you please better explain "mostly appear correct"? As a newbie I don't understand what to look for. Seeing what would be NOT correct? An image would be the best way to make this real clear. Thx.

[hakko504]

Originally posted by 1loser
We all appreciated all the time you put into this valuable post.Thank you. Could you please better explain "mostly appear correct"? As a newbie I don't understand what to look for. Seeing what would be NOT correct? An image would be the best way to make this real clear. Thx. You should look for interlaced picture, they mostly come out with jagged edges. If you only get 1 (or 2) with long unregular intervals together with repeated frames (1 in 5) then you can safely use IVTC on the film.
If however almost every frame shows signs of interlacing then you must use a real de-interlacer instead.
Manono (thanks) pointed me to this article by robshot (http://www.doom9.org/synch.htm) that explains a lot about telecining, unfortunately without pictures. Nicky Page (http://nickyguides.digital-digest.com) also has some good information on the subject in this article (http://nickyguides.digital-digest.com/interlace.htm). Nicky's site is a good resource for basic DVD information, very well written and with relevant pictures. Unfortunately he doesn't maintain it any longer and therefor a lot of info is out of date (and there is a few errors as well, but hey, nobody's perfect.:devil: )

[1loser]

Originally posted by hakko504
You should look for interlaced picture, they mostly come out with jagged edges. If you only get 1 (or 2) with long unregular intervals together with repeated frames (1 in 5) then you can safely use IVTC on the film.
If however almost every frame shows signs of interlacing then you must use a real de-interlacer instead.
That's exactly what I needed to know, now it's clear to me. :)

[1loser]

When using DVD2AVI the statistics window says FILM.

I than create a project with DVD2AVI and get:
Stream_Type=1,0,0
iDCT_Algorithm=2
YUVRGB_Scale=0
Luminance=128,0
Picture_Size=0,0,0,0,0,0
Field_Operation=0
Frame_Rate=29970
Location=0,0,5,6A312

When I use DVD2SVCD and let it create a project file I get:
Stream_Type=1,0,0
iDCT_Algorithm=2
YUVRGB_Scale=1
Luminance=128,0
Picture_Size=0,0,0,0,0,0
Field_Operation=1
Frame_Rate=23976
Location=0,0,5,6A312

How do I determine which is correct? If DVD2SVCD is correct with 23.976 fps is there a way to encode so I don't have to use the 3:2 pulldown? Is using 3:2 pulldown always necessary when the source is 23.976 fps and you need it to be 29.970? I realize that DVD2SVCD will use the pulldown.

[hakko504]

I think you forgot to check 'Force FILM' in the first case...
:cool:

[1loser]

Originally posted by hakko504
I think you forgot to check 'Force FILM' in the first case...
:cool: Since I'm a newbie, just about everything is new to me including force film. How do I know when to select force film? Now when I create the project in DVD2AVI it tells me fps 23.976 FILM 99%. I guess all I need to do is a 3:2 pulldown after video is encoded.

[hakko504]

First a reminder about the forum rules, (http://forum.doom9.org/forum-rules.htm) #1 in particular.

A quote from Doom9's guide on DVD2AVI: (http://www.doom9.org/mpg/dvd2avi.htm) If it's FILM at a percentage higher or equal to 95% you can activate Forced FILM as shown below. IF it only shows FILM the same applies!

[hakko504]

Could a moderator please unsticky this thread and instead sticky the new thread http://forum.doom9.org/showthread.php?s=&threadid=34696 and close it at the same time.