DVD-RB resize problems

[romi7519]

Im encoding a dvd with a 4:3 A/R to 16:9.

When I select the option to do this in DVD-RB, its doesn't look right so I'm trying to enter my own params with cropping.

Here is what DVD-RB inputs:

SeparateFields().LanczosResize(720,240,0,30,720,180).Weave()

And here is what I would like to input:

SeparateFields().LanczosResize(720,480,12,64,702,352).Weave()

Problem is I don't know the correct values to enter as its separating the fields and then weaving them back together, so with my script, size is coming out double the height..
I can see that the DVD-RB script has halved the values so I know my script should be changed.

Any help appreciated..

[45tripp]

SeparateFields().LanczosResize(720,240,0,60,720,180).Weave()

SeparateFields().LanczosResize(720,240,0,32,0,-88).Weave()

SeparateFields().LanczosResize(720,240,8,60,704,180).Weave()

[romi7519]

Can u pls explain a bit more on the above?

Thanks.

[45tripp]

Can you provide more info on your source and the problem you're having with the target result?
Pictures even.
Have you tried any of the above?

4/3 dvd has an actual width of 640.
640/1.78=360.
480-360=120. Crop 60 off bottom and 60 off top.
Letterbox?
If you're actually cutting into the image, then you're more likely to lose valuable image from the top, so you crop 32 (less) from the top and 88 (more) from the bottom.

Separating a frame you get it's two fields; each with half the vertical resolution.
480/2=240.
360/2=180.

http://avisynth.org/Resize

https://www.videohelp.com/forum/archive/determining-aspect-ratios-and-resolutions-t174200.html

[romi7519]

My source is 4:3 original resolution, Im trying to encode to 16:9 using the DVD-RB in built feature. I can add just

LanczosResize(720,480,12,64,702,352)

and it looks fine but if I add

SeparateFields().LanczosResize(720,480,12,64,702,352).Weave()

it comes out double the height. I wanted more info on the numbers and what they mean.

I'll read up on the links you have given and post back if I still need help.

Thanks mate.

[45tripp]

regarding more info,
You could provide gspot/mediainfo info, screenshots, a video sample even.

SeparateFields().LanczosResize(720,480,12,64,702,352).Weave()

it comes out double the height.

Separating a frame you get it's two fields; each with half the vertical resolution.
480/2=240
360/2=180

vertical=height
720,480 frame splits to two 720,240 fields.

I can add just

LanczosResize(720,480,12,64,702,352)

and it looks fine

separatefields().resize().weave() is an easy way to resize interlaced material.
If your source is interlaced it shouldn't look ok.
If it's not there is no reason to seperate fields, resize and weave.

gl

[romi7519]

I wouldve provided sample in the 1st post but I thought it would be a pretty straightforward answer to my question.

Heres the sample: http://maxupload.com/799560F0

I would like to crop the excess bits to the left & right and resize to 16:9 AR (720x480)

This is what I got from PARonoia

LanczosResize(720,480,12,64,702,352)

but my material is interlaced.

Cheers!

[manono]

SeparateFields().LanczosResize(720,240,12,34,702,1 76).Weave()

If it's not interlaced (Are you sure it's interlaced? How are you figuring that out?), then:

LanczosResize(720,480,12,64,702,352)

[romi7519]

^ tried that, didnt work in dvd-rb. that was actually the 1st thing I tried.

EDIT: Ignore the above, just noticed a diff

SeparateFields().LanczosResize(720,240,12,34,702,176).Weave()

I was trying:

SeparateFields().LanczosResize(720,240,12,64,702,176).Weave()

Lemme see...

[manono]

I tested it myself. It works. Except I made a mistake also, but not enough to throw off DVD-RB; just enough to crop more than necessary. Do this:

SeparateFields().LanczosResize(720,240,12,32,702,1 76).Weave()

[romi7519]

manono, is there a better way to go about resizing interlaced material?

How would I go about using this: http://forum.doom9.org/showthread.php?t=74906 with the above?

[manono]

Yeah, there's a better way, as scharfi explains in the thread. You SmartBob, filter (crop and resize), Separate the fields, choose the ones you want (SelectEvery), and Weave them back together again:

LeakKernelBob(Order=1)#if TFF
LanczosResize(720,480,12,64,702,352)
SeparateFields()
SelectEvery(4,0,3)#if TFF
Weave()
ConvertToYUY2(Interlaced=True)#for CCE, although DVD-RB adds it, I think

Again I ask though, if you're sure it's interlaced and how you're telling. Don't rely on DGIndex or some other software, is what I'm getting at. Check with your eyes.

[45tripp]

it's interlaced
SeparateFields().LanczosResize(720,240,16,34,-8,-34).Weave()

edit:
for bob
LanczosResize(720,480,16,64,-8,-64)

[romi7519]

Yes its interlaced, the sample is there. Thank you 45tripp and manono for your help. I think I have got to grips with this method of resizing now.

Cheers!

[manono]

Yes its interlaced...

Well, not exactly. It's a typical Indian DVD converted to NTSC by field-blending a PAL source. It can be made progressive again using the RePAL filter, or a number of other unblenders. The script goes something like this:

SetMTMode(2)#For dual core CPUs
LoadPlugin("C:\Path\To\DGDecode.dll")
LoadPlugin("C:\Path\To\RePAL.dll")
LoadCPlugin("C:\Path\To\Yadif.dll")
LoadPlugin("C:\Path\To\ColorMatrix.dll")
MPEG2Source("C:\Path\To\Sample.d2v",Info=3)
ColorMatrix (mode="Rec.601->Rec.709", hints=true,Interlaced=True)
Yadif(Order=1,Mode=1)#or any other SmartBobber you prefer
RePAL()
Crop(16,64,-8,-64)#or use your crop/resize settings
Lanczos4Resize(720,480)
ConvertToYUY2()#for CCE

You need the ColorMatrix filter because the source is SMPTE 170M and CCE expects BT.709. The result is a progressive 24.975fps MPV which can be made DVD compliant by running it through DGPulldown set for 24.975->29.97fps. This is nothing you can do using DVD-Rebuilder, though. You'll have to do it manually. Also, I'm not convinced the AR as on that DVD is even correct. That guy is mighty thin, and the fan, which is pointed straight at us, I think, is oval shaped. I didn't mess with that, though. Here's the progressively reencoded 16:9 and pulled down M2V:

http://www.badongo.com/file/3246017

[romi7519]

In the clip you uploaded, the A/R seems OK. What would you say it should be if you don't mind taking a dig at it pls?

Cheers for taking the time to provide that script!

[manono]

Hi-

What would you say it should be if you don't mind taking a dig at it pls?

I don't really know, as all I really have to go on is the fan and the very thin man. And the man really could be that thin. You have the complete movie, and if you wanted to be sure, go and find something round, like a sun, moon, a ball, or clock or something like that. If they look like ovals rather than like circles, then you'll know you're onto something. And it's not at all unusual for Indian DVDs to get the AR wrong. Eros is notorious for it.

[45tripp]

Change the end of the script with these,
with the last being most probable.

Crop(16,64,-8,-64)#or use your crop/resize settings
Lanczos4Resize(720,462)
addborders(0,8,0,10)
ConvertToYUY2()#for CCE

Crop(16,64,-8,-64)#or use your crop/resize settings
Lanczos4Resize(720,412)
addborders(0,34,0,34)
ConvertToYUY2()#for CCE

Crop(16,64,-8,-64)#or use your crop/resize settings
Lanczos4Resize(720,392)
addborders(0,44,0,44)
ConvertToYUY2()#for CCE

[romi7519]

Guys, I'm really grateful to you for helping me out here.
Just one lil question @ 45tripp.

I'm guessing I need to adjust the params to fit between SeparateFields() & Weave() as I don't want to deinterlace and just do a str8forward encode using DVD-RB.

[45tripp]

yes,
it's worth doing it manono's way though.

SeparateFields().LanczosResize(720,230,16,34,-8,-34).Weave()
addborders(0,10,0,10)

SeparateFields().LanczosResize(720,206,16,34,-8,-34).Weave()
addborders(0,34,0,34)

SeparateFields().LanczosResize(720,196,16,34,-8,-34).Weave()
addborders(0,44,0,44)

[romi7519]

^ cheers 45tripp!

[Alex_ander]

Manono, is there a way to make CCE encode at 24.975? It always uses 'legal' numbers like 25 but this changes video duration. I once wanted it for PAL restoration but finally had to speed up audio by 0.1% instead of planned pulldown (got progressive PAL at least). Previously tried to 'fool' DGPulldown by typing input 24.975 instead of actual 25 (assumed by Avisynth before encoding) but it kept video duration.

[romi7519]

U need to add

assumefps(25)

to your script and do the lil trick as u mentioned in dgpulldown.

[Alex_ander]

U need to add

assumefps(25)

to your script and do the lil trick as u mentioned in dgpulldown.

That was what I tried to do.
If that trick worked (I had some hope that DGPulldown like Avisynth could assume a different framerate/length for the input number of frames) I'd get video length corrected back (after I had changed it in Avisynth by assuming 25 for originally 24.975 video) but I didn't. Also tested on bigger numbers by typing pulldown settings 25=>29.97 for a 23.976 video - the output duration was the same with both 'correct' and 'incorrect' settings. Do you get other results?

[romi7519]

I have done 24.975 using assumefps(25) in my scripts then feeding it to dgpulldown using 24.975-->29.97

works fine so far..

[Alex_ander]

works fine so far..

AssumeFPS() changes video duration (0.1% in our case). Do you mean you have audio in synch (in the end of your movie) at this?

[manono]

Manono, is there a way to make CCE encode at 24.975?

No, but you don't have to. It comes out OK in the end after running it through DGPulldown set for 24.975->29.97fps. That will reset the framerate/length. I see the recommendation to add AssumeFPS(25) to the script, but I've never done that. The audio always comes out in synch.

If you're converting to PAL and don't want to stretch the audio, then you'd do 24.975->25.

[romi7519]

^ CCE wont accept it if assumefps(25) isn't added.

[Alex_ander]

@romi7519: from what I've tried, it does accept 24.975 for encoding at 25 (I use 2.70 SP) and does it the same way as if the source were 25fps.

@manono: thanks for the answer but I still get the original length with 24.975 =>25 setting for 25fps source (DGPulldown 1.0.11); tried to check/uncheck 'set timecodes'. Same with 29.97 target.

[manono]

^ CCE wont accept it if assumefps(25) isn't added.

I never add it, and I've done maybe 150 of these things. Uncheck "For DVD" at the top. I told you you can't do it within DVD-RB. Or are you experimenting doing it on your own?

@manono: thanks for the answer but I still get the original length with 24.975 =>25 setting for 25fps source (DGPulldown 1.0.11); tried to check/uncheck 'set timecodes'. Same with 29.97 target.

I thought original length was the whole idea. That way you don't have to stretch the audio. If you add AssumeFPS(25) and stretch the audio a bit, then you have no need to apply pulldown at all (if making a PAL 720x576 DVD).

If you add AssumeFPS(23.976) to the script for 720x480 NTSC DVD and stretch the audio, then you apply DGPulldown (or use the 2:3 or 3:2 pulldown available within CCE) at the default 23.976->29.97fps. Either way, you don't check the Custom box and fill in 24.975->Whatever.

Did I not understand something?