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Interlace artifacts after crop
vegas pro 10d, Win XP SP3, 4GB Ram, PAL
Dropped an AVI onto the timeline, clip contains footage for greenscreening. project properties set to PAL DV, and media recorded from camera using same settings.
Footage shows fine when scrolling through the timeline.
I want to crop it slightly to get rid of the edge of the greenscreen – no more than about 5%. As soon as I crop I get interface artifacts.
Once cropped, I have checked that the properties of the project and media still match – and they do.
has anybody noticed similar behavior? i.e. once you crop a clip, interlace artifacts are introduced – and once I right-click and ‘restore’ in the pan/crop dialogue, the interlace artifacts disappear. Interestingly, as I alter the crop ratio, the interlacing artifacts seem to ‘rotate’. Also, if you set ‘stretch to fill frame’ to ‘no’ – the interface artifacts disappear, but obviously the picture is much smaller.
Any suggestions/thoughts welcome as to why this is?
gspot tells me the avi contains dvc/dv video which is interlaced
Thank you.
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4 Replies
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Use the bezier mask tool in Pan/Crop to get rid of any unwanted garbage.
I’ve done this a number of times on green screen shoots where I had to overshoot the green screen to get the shot I wanted. -
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I had the same problem but it isnt just the case of Vegas. Basically interlaced footage can’t be scaled because there is something going wrong with half fields. In order to do it you should deinterlace the footage (blend or interpolate fields) and then scale it.
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Yeah, I’ve noticed that too with interlace footage. It’s a pain in the a**. If scaling or using track motion with interlace footage in sony Vegas, use deinterlace in the project properties or render progressive with either Vegas’s deinterlace options or a third party deinterlace plugin as a media effect.
If you’re using scaling or track motion only in a small portion of your footage, split it and render that clip with deinterlace enabled in the project properties, either Interpolate or Blend, which ever suits your footage, in a lossless AVI. Then drop that rendered clip back in your timeline where it belongs and disable deinterlace. That clip will still be interlaced.
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