Interlaced or De-Interlaced

[Fozzee]

Hi

Is there a program which you can input your capture into, and it will tell you whether or not the video is interlaced??

Fozzee

[racer-x]

Why not extract a frame from the video. The image will have horizontal lines if it is interlaced and will be clear if not.

PowerDVD has a built in Deinterlace filter. WMP does not.

[Fozzee]

How do I EXTRACT a frame??

Cheers

Fozzee

[pijetro]

Your question is self explanitory.

1) If you capture at 352x240, then you won't have interlace.

2) Anything captured at ???x480, is interlaced.

Unless you're capping DVD. But why would anybody do that?

[Fozzee]

Your question is self explanitory.

1) If you capture at 352x240, then you won't have interlace.

2) Anything captured at ???x480, is interlaced.

Unless you're capping DVD. But why would anybody do that?

I'm talking about mpeg2 capture.
And I've been told most of them capture deinterlaced!!
Including PowerVCR2, PowerDirector Pro (has option to turn off not sure if it works) and WinDVR.

So I wanted to check my captures.
So not self explanatory at all !!

Fozzee

[racer-x]

You can use Vitualdub mod (and many others) to extract a frame.

[dcsos]

Can someone help FOZEE and ME this doesn't seem evident to me either

[Will Hay]

I would imagine extracting a frame, in principle, is the same as sourcing a range in TMPGEnc.
You should select the first frame you want, hit [ in Vdub and then go to the next frame and hit ]
All you're doing is creating an avi consisting of one frame.
Then you just save and view the saved stil image.
Will

[Will Hay]

I'm talking about mpeg2 capture.
And I've been told most of them capture deinterlaced!!
Including PowerVCR2, PowerDirector Pro (has option to turn off not sure if it works) and WinDVR.

So I wanted to check my captures.
So not self explanatory at all !!

Interlace or deinterlaced depends on the source, not the capture software, or am I reading your message wrong?

Interlace
This refers to your original footage. The vast majority of video cameras records in interlaced mode. Some cameras can optionally record in a non-interlaced mode called progressive scan. If your source footage is progressive scan video, film or non-interlaced animation, select Non-interlace.

That may or may not help, but it's brought to you courtesy of Rui del-*****, author of this superb guide on configuring TMPGEnc for optimal mpeg2 results.
Will

[Fozzee]

[Interlace or deinterlaced depends on the source, not the capture software, or am I reading your message wrong?

Interlace
This refers to your original footage. The vast majority of video cameras records in interlaced mode. Some cameras can optionally record in a non-interlaced mode called progressive scan. If your source footage is progressive scan video, film or non-interlaced animation, select Non-interlace.

Hi
Either I'm not explaining myself properly or I am completely lost.
(More likely the later)

I have been told most mpeg2 capture programs only capture de-interlaced.
In other words even if the source is interlaced it will de-interlace it.
But no-one seems able to confirm or deny this.
I've been at this question for 2 days solid searching everywhere.
I think because most of these mpeg2 capture programs are also for displaying tv on your pc. They assume that you will watch your captures on the pc, hence de-interlaced they will look better.

So as you can see the source is irrelevant it seems the programs de-interlace the source anyway.

Can anyone end this mission by confirming or denying this.

Fozzee

[racer-x]

Fozzee, You may be right in that capturing MPG-2 Deinterlaces the video. When you view a video in Power DVD it deinerlaces it for you. That is why a DV-AVI always looks better in Power dvd than in WMP.

Here is a clip of a frame I extracted from DV-AVI. I then Deinterlaced half of it in Photoshop to show the difference.

[Fozzee]

Hi

When I capture with avi I see the effect on the left.
But with mpeg2 my captures look like the one on the right.
But..... With powerDirector Pro is has the option to untick the de-interlace box and I do that but it still looks smooth.
Would i see the lined affect in an mpeg2 interlaced capture??
I know PowerDVD shows you the video de-interlaced (even if source is interlaced) But WMP shows it smooth too and that doesn't de-interlace.

So would I see the lines with mpeg2 like you do with avi??

And does it really make that much difference to your encoder??

Cheers

Fozz

[racer-x]

I usually only extract frames from AVI because it gives best quality. As far as I know, the only time an interlaced video effects an encoder, is if you have the wrong field order first. In that case you'll notice that the video will play very jerky on TV but not on PC.

[Amontillado]

you can test it with PowerDVD.
Play the file with powerDVD and set the video Mode (in video settings, advanced) to "Weave", wich is normaly set to autoselect, or Bob.
If you now see interlace lines the files are interlaced, if you don't that means that either the source was not interlaced, or the file is deinterlaced.

[Fozzee]

Hi
How do I post pictures??
So someone with a more experienced eye can tell me if they are or not.
I know I can capture stills with powerDVD but how do I post them?

Cheers

Fozzee

[Will Hay]

How do I post pictures??
So someone with a more experienced eye can tell me if they are or not.
I know I can capture stills with powerDVD but how do I post them

Will

[Fozzee]

I can't get the image to show!

[Fozzee]

PowewDirector Pro I think this image is interlaced

[Ufit]

Best way to get perfect results in image is to capture INTERLACED and
than filter with Dynamic Field Order Correction filter (VDub). GREAT results
especially for TV. If you just deinterlace it wil remove EVEN or ODD lines and substitute them with next frame which gives you always pixelation.
Of course some progs play further with that BS blurring and blending them.
But that's not the way for good image. Works great with TV captures.
see it for yourself

[mgh]

All MPEG2 playback codecs for the PC have built in de-interlacing as has been mentioned in the forum before. So if it is a MPEG2-almost impossible to find out whether it is interlaced. Anything with less than or equal to 240 pixel v resolution for NTSC or 288 pixels v resolution for PAL is non-interlaced.
With AVIs it is possible to find out by loading it in TMPGEnc and checking out the video in the Deinterlace filter dialog box with None selected.

[racer-x]

Fozzee, You can open the MPG in DVD2AVI - hit F6 to get statistics - then hit F5 to preview the video. In the statistics (on the right) it will say if it is Interlaced or Progesive (Non interlaced). You can find it in the tools section of this site.

Hope that will help you.