Movie Clip encoded as interlanced yet output 'seems' de-interlanced

[ZenMystic]

After reading about capturing I thought I'd try it I captured a family clip using the Morgan jpeg codec. I then used TMPGEnc to encode it to mpg2 it said the source was 29.97 fps and interlaced which for the USA that is correct as far as I knew. So I let it out put it as interlaced using the NTSC DVD template. Now I had read that to expect it to look a bit 'liney' on my monitor as that was interlace at work but not to worry, it would look ok my TV.

I then authored the clip using spruceup and burned to DVD. So far so good I thought...

However when I play the DVD on my standard DVD player on my TV its very very liney when there is movement and again from what I read this is interlace at work....

What is wrong? I thought clips that were going to be viewed on TV had to be interlaced? And as far as I know the clip is.... Is it trying to interlace again on play back to my TV? Did spruceup perhaps de-interlace it? Or is the trace lines during movement something else? bitrate too high maybe????? I just don't know

How do I track the problem down?

oh yes... the movie is at 7000kbps and the sound is AC3 2 ch 256kbps

[Mug Funky]

did the video get resized at any point? that'll do it...

interlace lines as you see them on a computer are not visible on a standard TV (that is a regular run-of-the-mill CRT). the interlace is perceived as smoother motion. if you see them on the TV then something's definitely wrong.

easiest way to solve your problem is either:

- post a sample

- run us through your encoding process as concisely as possible.

just fyi: i'm pretty sure spruceup can't do any encoding at all, let alone filtering such as deinterlacing. Not even the Spruce hardware encoder cards do that as they're designed for interlaced footage and take it nearly as well as progressive - there's no point in deinterlacing at the encoding/authoring stage IMHO.

my bet is that there's vertical resizing going on, and that's blurring the fields together (fields = groups of odd or even lines. even and odd must never meet - it's like crossing the streams if you're a ghostbuster).

[ZenMystic]

yes I resized it.....

I wrote a simple script as am new to AVISynth too

# AVI
AviSource("G:\Pigley\Capture.avi",audio=false,pixel_type="YUY2")

# CROPPING
crop(0,34,720,414)

# RESIZING
LanczosResize(720,480)

Its the avs script TMPPGEnc loads...

The thing is I told TMPGEnc to make the output interlacded as well....
I chose 720 so as to be like a dvd But based on what you have said maybe its resizing to 640?

Should I just make it 640x480 then you think?

[Video Dude]

You messed up the interlace by resizing. You must take LanczosResize out of your script. Your script is for progressive material while you have an interlace clip. Don't resize clips that are interlaced!!!

If you must crop, then use AddBorders after it to make it 720x480.


Should I just make it 640x480 then you think?No.

[ZenMystic]

What can I say am a noob......

Thanks for taking the the time with a newbie Appreicate it thanks guys....

The reason I croped and resized in the first place was to get rid of 2 thin black boarders at the top and bottom.

But am guessing from what you said they are supposed to be there... which is ok... I just dont remember them being there when viewed on my tv....

[Guest]

I just dont remember them being there when viewed on my tv.... That's because they are in the overscan area. Read about it here:

http://www.hkflix.com/xq/asp/infoID.27/qx/info.htm