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Old 24th July 2005, 09:26   #1  |  Link
Deckerr
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Crop & deinterlace

Hi

I have got a video I want to crop and add borders to. From what I understand if the video is interlaced you should keep it that way. But the only way I can get it look right during playback is to deinterlace it. Is there another way to do it? Below is my script I used.

Thanks


MPEG2Source("c test.d2v")
FieldDeinterlace()
Crop(4,122,-0,-126)
BicubicResize(720,436)
AddBorders(0,70,0,70)
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Old 24th July 2005, 11:00   #2  |  Link
Mug Funky
interlace this!
 
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if you're cropping by even numbers (inevitable in YV12...) you can get a speed increase by cropping before deinterlacing - field-order will be preserved.
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Old 24th July 2005, 13:43   #3  |  Link
Guest
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Quote:
Originally Posted by Deckerr
I have got a video I want to crop and add borders to. From what I understand if the video is interlaced you should keep it that way.
That's true only if you want to display the video on an interlaced device. If you want to watch it on a progressive display, such as a PC monitor, you'll want to decomb it.

Quote:
But the only way I can get it look right during playback is to deinterlace it. Is there another way to do it? Below is my script I used.
The script is OK and Mug Funky's suggestion is correct and useful.
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Old 24th July 2005, 14:23   #4  |  Link
Deckerr
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Yep I changed it to the Mug Funky's suggestion.

But now I'm confused... From reading your answer's before neuron2 are you calling my "FieldDeinterlace()" as your "decomb" because this is your prefered term of use? And if so a PAL TV is progressive right and I can encode the video as progressive with my encoding software?
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Old 24th July 2005, 15:02   #5  |  Link
Video Dude
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PAL TVs are interlaced. If you play deinterlaced video on an interlace TV your results will look bad.

FieldDeinterlace() is only one part of Decomb
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Old 25th July 2005, 17:40   #6  |  Link
Deckerr
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So do I have to deinterlace and decomb? I did some reading on decomb but I'm still lost. If decomb should be used can you show me a script example please.

I've also realised that there is no reason to crop all the film and add borders again, just cropping some of it and leaving some of the borders seems a better option. This is the latest script that works ATM.


MPEG2Source("c test.d2v")
Crop(4,56,-0,-60)
FieldDeinterlace()
BicubicResize(720,576)
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